View source for Senate of the Philippines

{{short description|Upper house of the Congress of the Philippines}}
{{Use mdy dates|date=September 2019}}
{{Use Philippine English|date=September 2022}}
{{infobox legislature
| background_color = firebrick
| name = Senate of the Philippines
| native_name = <small>''Senado ng Pilipinas''</small>
| legislature = [[20th Congress of the Philippines]]
| coa_pic = Seal of the Philippine Senate.svg
| coa_caption = [[Seal of the Senate of the Philippines]]
| logo_pic = Flag of the Senate President of the Philippines.svg{{!}}border
| logo_caption = Flag of the Senate of the Philippines
| house_type = Upper house
| body = Congress of the Philippines
| motto = ''Legis Servitae Pax Fiat''<br><small>(Law Serves Peace, Let It Be Done)</small>
{{listen|embed=yes
| filename     = Senadong Marangal - Hymn of the Senate of the Philippines.mp3
| title        = ''Senadong Marangal''<br><small>(The Honorable Senate)</small>
| description  = <small>Anthem of the Senate of the Philippines. Musical composition by Felipe de Leon Jr., lyrics written by National Artist [[Virgilio S. Almario]], <br> played by the [[Philippine Philharmonic Orchestra]] and sung by Bernadette Mamauag.</small>
}}  
| term_limits = 2 consecutive terms (12 years)
| foundation = {{Start date|1916|10|16}}
| preceded_by = [[Taft Commission|Second Philippine Commission]]
| leader1_type = [[President of the Senate of the Philippines|Senate President]]
| leader1 = [[Tito Sotto]] ([[Nationalist People's Coalition|NPC]])
| election1 = September 8, 2025
| leader2_type = [[President pro tempore of the Senate of the Philippines|President ''pro tempore'']]
| leader2 = [[Panfilo Lacson]] ([[Independent politician|Independent]])
| election2 = September 8, 2025
| leader3_type = [[Majority Floor Leader of the Senate of the Philippines|Majority Leader]]
| leader3 = [[Juan Miguel Zubiri]] ([[Independent politician|Independent]])
| election3 = September 8, 2025
| leader4_type = [[Minority Floor Leader of the Senate of the Philippines|Minority Leader]]
| leader4 = [[Alan Peter Cayetano]] ([[Independent politician|Independent]])
| election4 = September 9, 2025
| term_length = 6 years, renewable once
| authority = Article VI, [[Constitution of the Philippines]]
| members = 24 senators
| structure1 = File:Philippine Senate composition.svg
| structure1_res = 250px
| political_groups1 =
'''Majority (15)'''
*{{Color box|{{party color|Nationalist People's Coalition}}|border=darkgray}} [[Nationalist People's Coalition|NPC]] (5)
*{{Color box|{{party color|Nacionalista Party}}|border=darkgray}} [[Nacionalista Party|Nacionalista]] (3)
*{{Color box|{{party color|Akbayan}}|border=darkgray}} [[Akbayan]] (1)
*{{Color box|{{party color|Katipunan ng Nagkakaisang Pilipino}}|border=darkgray}} [[Katipunan ng Nagkakaisang Pilipino|KNP]] (1)
*{{Color box|{{party color|Lakas-CMD}}|border=darkgray}} [[Lakas–CMD|Lakas]] (1)
*{{Color box|{{party color|Liberal Party (Philippines)}}|border=darkgray}} [[Liberal Party (Philippines)|Liberal]] (1)
*{{Color box|{{party color|Independent}}|border=darkgray}} [[Independent politician|Independent]] (3)
'''Minority (9)'''
*{{Color box|{{party color|Partido Demokratiko Pilipino-Lakas ng Bayan}}|border=darkgray}} [[Partido Demokratiko Pilipino|PDP]] (3)
*{{Color box|{{party color|Nacionalista Party}}|border=darkgray}} [[Nacionalista Party|Nacionalista]] (1)
*{{Color box|{{party color|Nationalist People's Coalition}}|border=darkgray}} [[Nationalist People's Coalition|NPC]] (1)
*{{Color box|{{party color|Pwersa ng Masang Pilipino}}|border=darkgray}} [[Pwersa ng Masang Pilipino|PMP]] (1)
*{{Color box|{{party color|Independent}}|border=darkgray}} [[Independent politician|Independent]] (3)
| committees1 = [[List of Philippine Senate committees|41 standing committees and 18 congressional oversight and ad hoc committees]]
| voting_system1 = [[Plurality block voting|Plurality-at-large voting]]
| last_election1 = [[2025 Philippine Senate election|May 12, 2025]] (12 seats)
| next_election1 = [[2028 Philippine Senate election|2028]] (12 seats)
| session_room = Philippine Senate Session Hall.jpg
| meeting_place = [[GSIS Building]], Financial Center, [[Jose W. Diokno Boulevard]], [[Pasay]]
| website = {{URL|senate.gov.ph}}, {{URL|legacy.senate.gov.ph}}
| rules = [https://web.senate.gov.ph/rules%20of%20the%20senate-july%202025.pdf Rules of the Senate] (English)
}}
{{Politics of Philippines}}The '''Senate of the Philippines''' ({{langx|fil|Senado ng Pilipinas}}) is the [[upper house]] of [[Congress of the Philippines|Congress]], the bicameral [[legislature]] of the [[Philippines]], with the [[House of Representatives of the Philippines|House of Representatives]] as the [[lower house]]. The Senate is composed of 24 [[senator]]s who are elected [[at-large]] (the country forms one district in [[Philippine Senate elections|senatorial elections]]) under a [[Plurality block voting|plurality-at-large voting system]].

Senators serve six-year terms with a maximum of two consecutive terms, with half of the senators elected in [[staggered elections]] every three years. When the Senate was restored by the [[Constitution of the Philippines|1987 Constitution]], the 24 senators who were elected in 1987 served until 1992. In 1992, the 12 candidates for the Senate obtaining the highest number of votes served until 1998, while the next 12 served until 1995. This is in accordance with the transitory provisions of the Constitution.  Thereafter, each senator elected serves the full six years. From 1945 to 1972, the Senate was a continuing body, with only eight seats up every two years.

Aside from having its concurrence on every bill in order to be passed for the [[President of the Philippines|president]]'s signature to become a law, the Senate is the only body that can concur with [[Treaty|treaties]] and try [[Impeachment in the Philippines|impeachment]] cases. The [[President of the Senate of the Philippines|president of the Senate]] is the presiding officer and highest-ranking official of the Senate. They are elected by the entire body to be their leader and are second in the [[Philippine presidential line of succession]]. The current officeholder is [[Tito Sotto|Vicente Sotto III]].

== History ==
[[File:Joint session of Philippine Legislature.jpg|thumbnail|left|Joint session of the [[Philippine Legislature]] including the newly-elected Senate, November 15, 1916.]]
[[Image:Sen. Primcias debates Sen. Paredes.jpg|thumb|left|The post–World War II Philippine Senate in 1951: [[Cipriano Primicias Sr.]], far left, debates [[Quintín Paredes]], far right. In the middle are [[Justiniano Montano]], [[Mariano Jesús Cuenco]], [[Enrique Magalona]], and [[Francisco Delgado]]; in the foreground is [[Edmundo Cea]]. Deliberations were once held at the [[Old Legislative Building (Manila)|Old Legislative Building]].]]

The Senate has its roots in the [[Philippine Commission]] of the [[Insular Government]]. Under the [[Philippine Organic Act]], from 1907 to 1916, the [[Philippine Commission]] headed by the [[governor-general of the Philippines]] served as the upper chamber of the [[Philippine Legislature]], with the [[Philippine Assembly]] as the elected [[lower house]]. At the same time the governor-general also exercised executive powers.

In August 1916 the [[United States Congress]] enacted the [[Philippine Autonomy Act]] or popularly known as the "Jones Law", which created an elected bicameral [[Philippine Legislature]] with the Senate as the [[upper chamber]] and with the [[House of Representatives of the Philippines]], previously called the Philippine Assembly, as the [[lower chamber]]. The governor-general continued to be the head of the [[executive branch]] of the Insular Government. Senators then were elected via [[Senatorial districts of the Philippines|senatorial districts]] via [[plurality-at-large voting]]; each district grouped several provinces and each elected two senators except for "non-Christian" provinces where the governor-general of the Philippines appointed the senators for the district.

Future president [[Manuel L. Quezon]], who was then [[Philippine Resident Commissioner]], encouraged future president [[Sergio Osmeña]], then [[Speaker (politics)|Speaker]] of the House, to run for the leadership of the Senate, but Osmeña preferred to continue leading the lower house. Quezon then ran for the Senate and became its president serving for 19 years (1916–1935).

This setup continued until 1935, when the [[Philippine Independence Act]] or the "Tydings–McDuffie Act" was passed by the [[U.S. Congress]] which granted the Filipinos the right to frame their own constitution in preparation for their independence, wherein they established a unicameral [[National Assembly of the Philippines]], effectively abolishing the Senate. Not long after the adoption of the 1935 Constitution several amendments began to be proposed. By 1938, the National Assembly began consideration of these proposals, which included restoring the Senate as the upper chamber of Congress. The amendment of the 1935 Constitution to have a bicameral legislature was approved in 1940 and the [[1941 Philippine Senate election|first biennial elections]] for the restored upper house was held in November 1941. Instead of the old senatorial districts, senators were elected via the entire country serving as an [[at-large]] district, although still under plurality-at-large voting, with voters voting up to eight candidates, and the eight candidates with the highest number of votes being elected. While the Senate from 1916 to 1935 had exclusive confirmation rights over executive appointments, as part of the compromises that restored the Senate in 1941, the power of confirming executive appointments has been exercised by a joint [[Commission on Appointments (Philippines)|Commission on Appointments]] composed of members of both houses. However, the Senate since its restoration and the independence of the Philippines in 1946 has the power to ratify treaties.

The Senate finally convened in 1945 and served as the upper chamber of Congress from thereon until the declaration of [[martial law]] by President [[Ferdinand Marcos]] in 1972, which shut down Congress. The Senate was resurrected in 1987 upon the ratification of the [[Constitution of the Philippines|1987 Constitution]]. However, instead of eight senators being replaced after every election, it was changed to twelve.

==Composition==
{{see also|Philippine senatorial elections}}
Article VI, Section 2 of the [[Constitution of the Philippines|1987 Philippine Constitution]] provides that the Senate shall be composed of 24 senators who shall be elected at-large by the qualified voters of the [[Philippines]], as may be provided by law.

The composition of the Senate is smaller in number as compared to the [[House of Representatives of the Philippines|House of Representatives]]. The members of this chamber are elected at large by the entire electorate. The rationale for this rule intends to make the Senate a training ground for national leaders and possibly a springboard for the [[President of the Philippines|presidency]].<ref name=":0">{{Cite web |title=Composition of the Senate |url=https://legacy.senate.gov.ph/senators/composition.asp |website=Senate of the Philippines}}</ref>

It follows also that the senator will have a broader outlook of the problems of the country, instead of being restricted by narrow viewpoints and interests by having a national rather than only a district constituency.<ref name=":0" />

The [[Senate Electoral Tribunal]] (SET) composed of three [[Supreme Court of the Philippines|Supreme Court]] justices and six senators determines election protests on already-seated senators. There had been three instances where the SET has replaced senators due to election protests, the last of which was in 2011 when the tribunal [[Pimentel III vs. Zubiri Senate Electoral Protest|awarded the protest]] of [[Koko Pimentel]] against [[Migz Zubiri]].<ref name="proclamation">{{cite news|last=Calonzo |first=Andero |title=Pimentel proclaimed 12th winning senator in '07 polls |work=GMA News Online |date=August 11, 2011 |access-date=August 11, 2011 |url=http://www.gmanews.tv/story/229132/nation/pimentel-proclaimed-12th-winning-senator-in-07-polls}}</ref>

==Qualifications==
The qualifications for membership in the Senate are expressly stated in Section 3, Article VI of the [[Constitution of the Philippines|1987 Philippine Constitution]], as follows:

No person shall be a Senator unless he is a
*natural-born citizen of the [[Philippines]], and on the day of the election, is
**at least 35 years of age,
**able to read and write,
**a registered voter, and
*a resident of the [[Philippines]] for not less than two years immediately preceding the day of the election.
The age is fixed at 35 and must be possessed on the day of the election, that is, when the polls are opened and the votes cast, and not on the day of the proclamation of the winners by the board of canvassers.

With regard to the residence requirements, it was ruled in the case of ''Lim v. Pelaez'' that it must be the place where one habitually resides and to which he, after absence, has the intention of returning.

The enumeration laid down by the [[Constitution of the Philippines|1987 Philippine Constitution]] is exclusive under the Latin principle of ''[[expressio unius est exclusio alterius]]''. This means that [[Congress of the Philippines|Congress]] cannot anymore add additional qualifications other than those provided by the [[Constitution of the Philippines|1987 Philippine Constitution]].

==Organization==
Under the [[Constitution of the Philippines|Constitution]], "[[Congress of the Philippines|Congress]] shall convene once every year on the fourth Monday of July for its regular session...". During this time, the Senate is organized to elect its officers. Specifically, the [[Constitution of the Philippines|1987 Philippine Constitution]] provides a definite statement to it:

{{blockquote
|text=

(1) The Senate shall elect its [[President of the Senate of the Philippines|President]] and the [[House of Representatives of the Philippines|House of Representatives]] its [[Speaker of the Philippine House of Representatives|Speaker]] by a vote of all its respective members.

(2) Each House shall choose such other officers as it may deem necessary.

(3) Each House may determine the rules of its proceedings, punish its Members for disorderly behavior, and, with the concurrence of two-thirds of all its Members, suspend or expel a Member. A penalty of suspension, when imposed, shall not exceed sixty days.

|multiline=true
|title=Article VI, Section 16, paragraphs 1 to 3
|source=The Constitution of the Philippines
}}

By virtue of these provisions of the Constitution, the Senate adopts its own rules, otherwise known as the "Rules of the Senate." The rules of the Senate provide the following officers: a [[President of the Senate of the Philippines|president]], a [[President pro tempore of the Senate of the Philippines|president pro tempore]], a [[Secretary of the Senate of the Philippines|secretary]] and a [[Sergeant-at-Arms of the Senate of the Philippines|sergeant-at-arms]].

Following this set of officers, the Senate as an institution can then be grouped into the Senate proper and the secretariat. The former belongs exclusively to the members of the Senate as well as its committees, while the latter renders support services to the members of the Senate.

The secretary and sergeant-at-arms are elected by the senators from among the employees and staff of the Senate. Meanwhile, the Senate president, the Senate president pro tempore, the majority floor leader, and the minority floor leader are elected from among the senators themselves.

Within the Senate, senators organize themselves into two main coalitions or blocs: the majority bloc and the minority bloc. These blocs are roughly analogous to the ruling coalition and the opposition in other legislatures. The majority and minority groupings help streamline legislative business by aligning members into those who support the chamber's leadership and those who constitute the opposition. Each bloc selects its own leaders to speak and act on its behalf during Senate sessions. This majority–minority structure is central to how the Philippine Senate operates, shaping everything from leadership positions to committee control and the flow of legislation.<ref name="Standard">{{cite news |last1=Taculao |first1=Patricia S. |title=The Majority and Minority: United as one |url=https://manilastandard.net/?p=314272123 |access-date=July 18, 2025 |work=Manila Standard |date=October 25, 2022}}</ref>

At the start of each new Congress (every three years when the Senate convenes after an election), senators decide whether to join the majority or minority. By longstanding practice, those who vote for the winning candidate for Senate president—the chamber's presiding officer—form the majority bloc, while those who vote for a different candidate (or otherwise choose not to align with the winner) form the minority bloc.<ref>{{cite news |last1=Servallos |first1=Neil Jason |title=7-member Duterte bloc backs Escudero for SP |url=https://www.philstar.com/headlines/2025/07/10/2456867/7-member-duterte-bloc-backs-escudero-sp |access-date=July 18, 2025 |work=The Philippine Star |date=July 10, 2025}}</ref> This tradition means bloc affiliation is not strictly based on [[List of political parties in the Philippines|political party]], but rather on alliances and choices in the Senate's internal leadership elections. For example, in the [[19th Congress of the Philippines|19th Congress]] (2022), almost all senators voted for a single candidate for the Senate presidency, resulting in a [[supermajority]] coalition of about 20 senators, while only two senators opted to form the minority bloc.<ref name="Inquirer">{{cite news |title=Majority or minority? Still no word on Cayetano siblings' choice |url=https://newsinfo.inquirer.net/1625398/majority-or-minority-still-no-word-on-cayetano-siblings-choice |access-date=July 18, 2025 |work=Philippine Daily Inquirer |date=July 11, 2022}}</ref> In previous Congresses, minority blocs have typically ranged from around 4 up to 9 members out of the 24-seat Senate, depending on political alignments of the day.<ref>{{cite news |last1=Dela Peña |first1=Kurt |title=Diminishing opposition in Congress: The danger of a rubber stamp legislature |url=https://newsinfo.inquirer.net/1606095/diminishing-opposition-in-congress-the-danger-of-a-rubber-stamp-legislature |access-date=July 18, 2025 |work=Philippine Daily Inquirer |date=June 3, 2022}}</ref> The rest of the Senate (usually the larger share) joins the majority. It is unusual for a senator to remain outside both blocs—those who attempt to be "independent" of either side often end up with no committee positions or influence until they align with one of the blocs.<ref name="Inquirer"/>

Because Philippine senators come from diverse parties (the Senate uses a [[multi-party system]] with senators elected [[at-large]]), both the majority and minority blocs are usually coalitions of multiple parties and independents rather than single-party [[caucus]]es. Senators often shift alliances after elections—for instance, many will join the majority coalition supporting the Senate leadership (often aligned with the incumbent president's agenda), even if they campaigned under different parties. The minority bloc, on the other hand, is generally composed of those in opposition to the current administration or Senate leadership. In practice, this means the majority bloc can include a broad spectrum of parties united by convenience or common support for the leadership, while the minority bloc is a smaller cross-party group representing the legislative opposition.

Membership in the [[Commission on Appointments]] is proportional to the size of blocs. This means the Senate's majority bloc receives a larger share of seats in that commission, while the minority bloc gets a smaller representation.

===Majority bloc===
The majority bloc controls the Philippine Senate's leadership positions. Its members, being the larger group, elect the [[President of the Senate of the Philippines|Senate president]], who is the head of the chamber and typically a senior figure from the majority. The Senate president presides over sessions and is considered the most powerful individual in the Senate. The majority bloc also chooses the [[Majority Floor Leader of the Senate of the Philippines|Senate majority floor leader]] from among its ranks.<ref name="Standard"/> The majority leader serves as the [[floor leader]] for the majority coalition and the Senate's primary legislative manager. In the Senate, the majority leader's primary responsibility is to manage the chamber's legislative business—scheduling debates and steering the majority's bills through the Senate.<ref name=":0"/> By tradition, the majority leader is concurrently the chairperson of the [[Philippine Senate Committee on Rules|Senate Committee on Rules]], giving them significant influence over the calendar of bills and the rules of debate. This makes the majority leader the Senate's agenda-setter, coordinating closely with the Senate president to decide which bills are prioritized for debate and voting.<ref name="Standard"/>

Because the majority bloc has the numerical strength, it holds sway over decisions in the Senate. The majority elects other officers (such as the [[President pro tempore of the Senate of the Philippines|Senate president pro tempore]] and [[List of Philippine Senate committees|committee]] chairpersons) and generally has the votes to pass legislation it favors. In Philippine legislative practice, the majority bloc works to advance the administration or majority coalition's legislative program, using its superior numbers to approve bills, budgets, and confirmations. Senators in the majority often receive chairmanships or memberships in key committees, reflecting their bloc's dominance. The majority bloc, holding the Senate's top offices, also controls many internal resources—for instance, office budgets for committee work, staff support for committees, and the flow of official Senate communications. In essence, the majority bloc "controls" the Senate: it occupies the top posts and most committee leadership roles, it can prioritize bills for passage, and it controls many of the chamber's internal resources. However, the majority is expected to govern responsibly, as it faces oversight and debate from the minority.<ref name="Inquirer"/>

===Minority bloc===
The minority bloc is the officially recognized [[Opposition (politics)|opposition]] group in the Senate. Its members did not support the prevailing Senate president and thus organized themselves as a check on the majority. The [[Minority Floor Leader of the Senate of the Philippines|Senate minority floor leader]] is often informally called the Senate's "[[Shadow cabinet|shadow president]]", in the sense that they lead the opposition and can serve as an alternative voice to the Senate president's leadership.<ref name=":0"/> The minority leader's role is to be the chief spokesperson and strategist for the minority. They articulate the minority bloc's positions and are expected to constructively criticize the policies and programs advanced by the majority.<ref>{{cite news |last1=Mangaluz |first1=Jean |title=Majority or minority? Projected Senate blocs, committee alignments — and why they matter |url=https://www.philstar.com/headlines/2025/07/09/2456752/majority-or-minority-projected-senate-blocs-committee-alignments-and-why-they-matter |access-date=July 18, 2025 |work=The Philippine Star |date=July 9, 2025}}</ref> In Philippine legislative parlance, this duty of the minority to scrutinize and offer alternatives is sometimes referred to as "fiscalizing"—acting as fiscal watchdogs and critics of the government's proposals.<ref>{{cite news |last1=Yap |first1=DJ |title=Lone opposition senator can serve as fiscalizer – Drilon |url=https://newsinfo.inquirer.net/1602093/lone-opposition-senator-can-serve-as-fiscalizer-drilon |access-date=July 18, 2025 |work=Philippine Daily Inquirer |date=May 25, 2022}}</ref>

Even though they lack the votes to win on their own, the minority leader and the minority bloc provide [[checks and balances]] by debating bills, pointing out flaws or issues, and proposing amendments. The minority leader is typically given the floor to respond to major speeches by the majority and to represent the dissenting view. By tradition, the Senate minority leader does not hold any [[List of Philippine Senate committees|committee]] chairmanships, in order to focus on leading the opposition (and perhaps to avoid conflicts of interest in overseeing executive programs).<ref name="Inquirer"/> Instead, the minority leader is usually granted membership in all committees as an [[Ex officio member|''ex officio'' member]], ensuring the minority is represented in every committee's discussions.<ref>{{cite news |title=Two-member Senate minority bloc as Cayetanos identify as 'independent' |url=https://www.philstar.com/headlines/2022/07/25/2197853/two-member-senate-minority-bloc-cayetanos-identify-independent |access-date=July 18, 2025 |work=The Philippine Star |date=July 25, 2022}}</ref> Minority bloc members can sit in committees (and even head a few select committees on occasion if the majority permits), but in general the minority has fewer committee leadership positions. Minority senators use the committee platform to ask probing questions and air the opposition's concerns on legislation and public issues.<ref>{{cite news |last1=Magsambol |first1=Bonz |title=Will Kiko-Bam join the Senate majority? |url=https://www.rappler.com/newsbreak/inside-track/kiko-pangilinan-bam-aquino-senate-majority-risa-hontiveros/ |access-date=July 18, 2025 |work=Rappler |date=July 10, 2025}}</ref>

Even with limited numbers, a minority bloc can influence public opinion and sometimes sway legislation by building coalitions issue-by-issue. Political observers and scientists warn that if the minority bloc becomes too small or ineffective, the Senate could turn into a mere "[[Rubber stamp (politics)|rubber stamp]]" for the executive branch's agenda, undermining the principle of [[separation of powers]].<ref>{{cite news |last1=Dela Peña |first1=Kurt |title=Diminishing opposition in Congress: The danger of a rubber stamp legislature |url=https://newsinfo.inquirer.net/1606095/diminishing-opposition-in-congress-the-danger-of-a-rubber-stamp-legislature |access-date=July 18, 2025 |work=Philippine Daily Inquirer |date=June 3, 2022}}</ref>

==Legislative powers==
The Philippine Senate was modeled upon the [[United States Senate]]; the two chambers of Congress have roughly equal powers, and every bill or resolution that has to go through both houses needs the consent of both chambers before being passed for the [[President of the Philippines]]'s signature. Once a bill is defeated in the Senate, it is lost. Once a bill is approved by the Senate on [[third reading]], the bill is passed to the [[House of Representatives of the Philippines|House of Representatives]], unless an identical bill has also been passed by the lower house. When a counterpart bill in the lower house is different from the one passed by the Senate, either a bicameral conference committee is created consisting of members from both chambers of Congress to reconcile the differences,<ref name=":1">{{cite web |title=Legislative Process |url=https://web.senate.gov.ph/about/legpro.asp |website=Senate of the Philippines}}</ref> or either chamber may instead approve the other chamber's version to expedite passage.<ref name=":2">{{cite web |title=The Constitutional Mandate |url=https://www.congress.gov.ph/about/ |website=House of Representatives of the Philippines}}</ref> Aside from a few special cases of origination (discussed below), the Senate's legislative power is essentially equal to that of the lower house,<ref>{{cite news |last1=Bolledo |first1=Jairo |title='We're not equal' — Chiz says House can’t refuse to accept Senate remand of impeachment case |url=https://www.rappler.com/philippines/chiz-escudero-house-cannot-refuse-accept-senate-remand-sara-duterte-impeachment/ |access-date=July 19, 2025 |work=Rappler |date=June 11, 2025}}</ref> unlike in some parliamentary systems where an upper chamber may have limited [[veto]] power.<ref>{{Cite web |last=Russell |first=Meg |author-link=Meg Russell |date=2000 |title=REFORMING THE HOUSE OF LORDS: Lessons from Overseas |url=https://www.aspg.org.au/wp-content/uploads/2017/09/22-BookReview-Griffith.pdf |url-status=live |archive-url=https://web.archive.org/web/20221025000022/https://www.aspg.org.au/wp-content/uploads/2017/09/22-BookReview-Griffith.pdf |archive-date=October 25, 2022 |access-date=January 24, 2022 |website=Australasian Study of Parliament Group |format=PDF}}</ref> In early 2025, the Senate approved multiple priority bills aimed at improving governance, economic performance, environmental protection, and digital service delivery. One of these measures is the [[E-Governance Act]], which seeks to enhance public service delivery through secure and efficient digital platforms.<ref>{{Cite web |title=Senate approves 7 key measures |url=https://www.pna.gov.ph/articles/1242756 |access-date=2025-10-13 |website=www.pna.gov.ph |language=en}}</ref>

===Financial and appropriation measures===
One constitutional exception in the legislative process is that certain types of bills must originate in the House of Representatives. The 1987 Constitution provides that all "[[Appropriation bill|appropriation]], revenue or [[tariff]] bills, bills authorizing an increase of the [[public debt]], bills of local application, and private bills" (which include [[Broadcast law#Philippines|franchise]] bills for public utilities or corporations) shall start in the House. However, the Senate retains the right to "propose or concur with amendments" to these House-initiated measures.<ref name="Constitute">{{cite web |title=Philippines 1987 Constitution |url=https://www.constituteproject.org/constitution/Philippines_1987 |website=Constitute Project}}</ref> This means budget laws, tax measures, and franchise bills are first filed and approved in the House, but the Senate can fully scrutinize, modify, or even reject such bills when they reach its chamber. No [[money bill]] takes effect without the Senate's consent, ensuring a balance where neither chamber can legislate unilaterally on national laws.

===Public oversight===
Beyond lawmaking, the Senate helps oversee the executive branch and public agencies. Under Article VI, Section 21 of the Constitution, the Senate (or any of its committees) may conduct inquiries "in aid of legislation".<ref name="Constitute"/> In practice, this oversight power allows the Senate to hold hearings and investigations on matters of public interest, government performance, and potential wrongdoing by officials. Such legislative inquiries are meant to gather information for crafting laws or to monitor and check the implementation of existing laws. The Senate can compel officials or private citizens to testify and produce documents as needed for these investigations. The [[Supreme Court of the Philippines|Supreme Court]] has affirmed that the power to conduct inquiries carries implicit authority to enforce attendance and testimony—for example, the Senate may cite recalcitrant witnesses in contempt or order their arrest to ensure cooperation.<ref>{{cite news |author1=[[Nilo Divina|Divina, Nilo]] |title=Contempt powers of Congress |url=https://tribune.net.ph/2025/03/27/contempt-powers-of-congress |access-date=July 19, 2025 |work=Daily Tribune |date=March 27, 2025}}</ref> High-profile investigations (sometimes termed "[[Senate Blue Ribbon Committee|blue ribbon]]" inquiries) are conducted by the Senate into allegations of corruption, misuse of funds, or other national issues. Through its oversight functions, the Senate helps ensure that laws are faithfully executed by the executive and that government officials remain accountable to the public.

===Confirming executive appointments===
The Senate also exerts influence over executive and judicial appointments via its participation in the [[Commission on Appointments]] (CA), a constitutional body that reviews and approves certain presidential appointments. It is composed of 25 members: the [[President of the Senate of the Philippines|Senate president]] as ''[[Ex officio member|ex officio]]'' chairperson, plus 12 senators and 12 members of the House of Representatives (selected by their respective chambers proportionally from blocs). Under the Constitution, appointments to key government positions require the Commission's consent before the officials can fully assume office. These positions include the heads of executive departments ([[Cabinet of the Philippines|Cabinet Secretaries]]), ambassadors and other high-ranking diplomats, officers of the [[Armed Forces of the Philippines|armed forces]] above the [[Military ranks of the Philippines|rank]] of colonel, and heads or commissioners of independent constitutional bodies (such as the [[Commission on Elections (Philippines)|Commission on Elections]], [[Civil Service Commission (Philippines)|Civil Service Commission]], and [[Commission on Audit]]), among others. In performing this function, the senators (who form one-half of the CA's membership) have substantial say in confirming or rejecting presidential nominees. The Senate president presides over the CA but votes only to break ties. This process ensures legislative oversight of high-level appointments—it prevents the Philippine president from installing officials in important posts without bipartisan consent. If the Commission on Appointments disapproves an appointment, or if it fails to act within 30 session days, the appointment is not confirmed and the nominee cannot continue in office. Through the CA, the Senate (together with the House contingent) performs a critical [[Advice and consent|advise-and-consent]] function, similar to the confirmation powers of the U.S. Senate but exercised by a joint body in the Philippine system.<ref>{{cite news |last1=Romero |first1=Alexis |title=Palace sends Angara appointment to CA |url=https://www.philstar.com/headlines/2024/07/29/2373782/palace-sends-angara-appointment-ca |access-date=July 19, 2025 |work=The Philippine Star |date=July 29, 2024}}</ref>

===Treaty concurrence===
[[File:Senate of the Philippines Ratification of the Reciprocal Access Agreement (RAA) between the Defense forces of the Philippines and Japan - December 16, 2024.webm|thumb|right|280px|The Senate ratifies the [[reciprocal access agreement]] between the militaries of [[Japan–Philippines relations|the Philippines and Japan]], December 16, 2024.]]
The Senate of the Philippines has the authority to concur in [[Treaty|treaties]]. While the president holds the power to negotiate and sign treaties and international agreements, no treaty can take effect and bind the Philippines without the Senate's consent. The Constitution (Article VII, Section 21) states that "no treaty or international agreement shall be valid and effective unless concurred in by at least two-thirds of all the members of the Senate".<ref name="Constitute"/> Therefore, at least 16 affirmative votes are required to ratify a treaty. The House of Representatives is not involved in the treaty ratification process—this power resides solely in the Senate, a design inspired by the United States Senate's role in foreign treaties. For example, agreements on defense, trade, or diplomatic relations with other countries must be submitted to the Senate for its concurrence after presidential signing. If the Senate withholds its concurrence (or votes to reject a treaty), the treaty cannot become part of Philippine law or obligation. In contrast, purely executive agreements that do not rise to the level of a treaty may be entered by the president and are generally not subject to Senate approval.<ref>{{cite news |last1=Gatdula |first1=Jemy |title=Of treaties, the VFA, and presidential power |url=https://www.bworldonline.com/editors-picks/2020/02/20/279855/of-treaties-the-vfa-and-presidential-power/ |access-date=July 20, 2025 |work=BusinessWorld Online |date=February 20, 2020}}</ref>

===Impeachment trials===
[[File:Senate Impeachment Court Convenes on the Impeachment of Renato Corona.jpg|thumb|Senate President [[Juan Ponce Enrile]] administers the oath to the senators serving as judges in the [[Impeachment of Renato Corona|impeachment trial]] of Chief Justice [[Renato Corona]], December 11, 2011.]]
The Senate has an exclusive role in [[Impeachment in the Philippines|impeachment]] trials. Under the Constitution, the power to initiate an impeachment rests with the House of Representatives (which brings forward impeachment charges, called the [[articles of impeachment]]). However, once the House impeaches an official, the Senate alone has the authority to sit as the impeachment court to try the case and render judgment. Article XI, Section 3(6) of the Constitution vests in the Senate "the sole power to try and decide all cases of impeachment".<ref>{{cite news |title=Senate tribunal must prevail |url=https://tribune.net.ph/2025/06/14/senate-tribunal-must-prevail |access-date=July 20, 2025 |work=Daily Tribune |date=June 14, 2025}}</ref><ref name="UPD">{{cite web |last1=Tamase |first1=Paolo S. |last2=Castro |first2=Jan Aurel Nikolai M. |last3=Chua |first3=Jillian Rae R. |last4=Espino |first4=Enrique Julian |last5=Mercado |first5=Roberto Daniel |title=Impeachment Primer and Frequently Asked Questions |url=https://law.upd.edu.ph/wp-content/uploads/2025/02/UP-Law-Impeachment-Primer-and-FAQs-Feb-7-2025.pdf |website=University of the Philippines College of Law |access-date=July 20, 2025 |date=February 7, 2025}}</ref> All senators act as judges in impeachment trials, with the Senate president presiding—except when the president of the Philippines is on trial, in which case the [[Chief Justice of the Philippines|chief justice of the Supreme Court]] presides over the Senate impeachment court (although the chief justice does not vote). The Senate has broad authority to conduct a full trial—including summoning witnesses, receiving evidence, and ultimately deciding whether to convict the official from office. If convicted, the official is removed from office and may also be barred from holding any future public office. To convict an impeached official and remove them from office, a two-thirds vote of all senators (at least 16 out of 24 senators) is required. The Senate's judgment in impeachment is final as to removal, although the dismissed official may still face criminal or civil liability in the courts after removal. In exercising this power, the Senate serves as a [[Check and balance|check]] on the [[Executive departments of the Philippines|executive]] and [[Judiciary of the Philippines|judicial branches]], since it can hold the [[President of the Philippines|president]], [[Vice President of the Philippines|vice president]], [[List of justices of the Supreme Court of the Philippines|Supreme Court justices]], and other constitutional officers accountable for impeachable offenses (such as treason, bribery, graft and corruption, betrayal of public trust, or culpable violations of the Constitution).<ref name="UPD"/>

===Other powers and functions===
In addition to the major powers outlined above, the Senate shares in a number of other constitutional functions of Congress. For instance, only the Congress (Senate and House jointly) may declare the existence of a [[state of war]], which requires a two-thirds vote in joint session voting separately. The Senate also participates in Congress's authority to approve or revoke the president's suspension of civil liberties or declaration of [[Martial law in the Philippines|martial law]] in emergencies, by majority vote of all members voting jointly. Furthermore, an amnesty proclamation issued by the president requires concurrence of a majority of all members of Congress (senators and representatives voting together). These extraordinary powers, however, are exercised by the Senate collectively with the House, rather than by the Senate alone. The Senate's internal leadership also plays a role in the broader government (for example, the Senate president is third in the [[Philippine presidential line of succession|line of succession to the presidency]] and co-chairs the Joint Congressional Oversight Committees on certain laws).<ref name="Constitute"/>

== Current members ==
{{See also|List of current senators of the Philippines}}

=== Leadership ===
*[[President of the Senate of the Philippines|Senate President]]: [[Tito Sotto]] 
*[[President pro tempore of the Senate of the Philippines|Senate President ''pro tempore'']]: [[Panfilo Lacson]]
*[[Majority Floor Leader of the Senate of the Philippines|Majority Floor Leader]]: [[Juan Miguel Zubiri]]
*[[Majority Floor Leader of the Senate of the Philippines|Deputy Majority Floor Leaders]]: [[JV Ejercito]] and [[Risa Hontiveros]]
*[[Minority Floor Leader of the Senate of the Philippines|Minority Floor Leader]]: [[Alan Peter Cayetano]]
*[[Minority Floor Leader of the Senate of the Philippines|Deputy Minority Leader]]: [[Rodante Marcoleta]] and [[Joel Villanueva]]
<!-- As per MOS:CREDENTIAL, adding academic or professional titles should be used only with subjects of a biography that are widely known by a pseudonym or stage name containing the title (e.g. "Doc Willie"). In other words, only if the subject is exclusively known by that name. These persons are not known that way.-->
*[[Secretary of the Senate of the Philippines|Secretary]]: <!-- Hid "Atty" Subject does not go by at "Atty  >Renato N. Bantug Jr."-->[[Renato Bantug Jr.]]
*[[Sergeant-at-Arms of the Senate of the Philippines|Sergeant-at-Arms]]: <!-- Hid Ret. Police Maj. Gen.--> Mao Aplasca

=== Members ===
{|class="wikitable sortable" style="text-align:center;"
! colspan="2" | [[List of senators of the Philippines|Senator]]<ref>{{cite news|last1=Viray|first1=Patricia Lourdes|title=Comelec proclaims Senate 'Magic 12'|url=http://www.philstar.com/headlines/2016/05/19/1584838/comelec-proclaims-senate-magic-12|access-date=May 19, 2016|publisher=The Philippine Star|date=May 19, 2016}}</ref>
! [[List of political parties in the Philippines|Party]]
! Term<br/>number
! Bloc
! Starts
! Ends
|-
| {{party color cell|Independent politician}}
| align="left" | {{sortname|Alan Peter|Cayetano}}
| [[Independent politician|Independent]]
| 1
| Minority
| rowspan="12" | June 30, 2022
| rowspan="12" | June 30, 2028
|-
| {{party color cell|Nationalist People's Coalition}}
| align="left" | {{sortname|JV|Ejercito}}
| [[Nationalist People's Coalition|NPC]]
| 1
| Majority
|-
| {{party color cell|Nationalist People's Coalition}}
| align="left" | {{sortname|Francis|Escudero}}
| [[Nationalist People's Coalition|NPC]]
| 1
| Minority
|-
| {{party color cell|PMP}}
| align="left" | {{sortname|Jinggoy|Estrada}}
| [[Pwersa ng Masang Pilipino|PMP]]
| 1
| Minority
|-
| {{party color cell|Nationalist People's Coalition}}
| align="left" | {{sortname|Win|Gatchalian}}
| [[Nationalist People's Coalition|NPC]]
| 2
| Majority
|-
| {{party color cell|Akbayan}}
| align="left" | {{sortname|Risa|Hontiveros}}
| [[Akbayan]]
| 2
| Majority
|-
| {{party color cell|Nationalist People's Coalition}}
| align="left" | {{sortname|Loren|Legarda}}
| [[Nationalist People's Coalition|NPC]]
| 1
| Majority
|-
| {{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
| align="left" | {{sortname|Robin|Padilla}}
| [[Partido Demokratiko Pilipino|PDP]]
| 1
| Minority
|-
| {{party color cell|Independent politician}}
| align="left" | {{sortname|Raffy|Tulfo}}
| [[Independent politician|Independent]]
| 1
| Majority
|-
| {{party color cell|Independent politician}}
| align="left" | {{sortname|Joel|Villanueva}}
| [[Independent politician|Independent]]
| 2
| Minority
|-
| {{party color cell|Nacionalista Party}}
| align="left" | {{sortname|Mark|Villar}}
| [[Nacionalista Party|Nacionalista]]
| 1
| Majority
|-
| {{party color cell|Independent politician}}
| align="left" | {{sortname|Juan Miguel|Zubiri}}
| [[Independent politician|Independent]]
| 2
| Majority
|-
| {{party color cell|Katipunan ng Nagkakaisang Pilipino}}
| align="left" | {{sortname|Bam|Aquino}}
| [[Katipunan ng Nagkakaisang Pilipino|KANP]]
| 1
| Majority
| rowspan="12" | June 30, 2025
| rowspan="12" | June 30, 2031
|-
| {{party color cell|Nacionalista Party}}
| align="left" | {{sortname|Pia|Cayetano}}
| [[Nacionalista Party|Nacionalista]]
| 2
| Majority
|-
| {{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
| align="left" | {{sortname|Ronald|dela Rosa}}
| [[Partido Demokratiko Pilipino|PDP]]
| 2
| Minority
|-
| {{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
| align="left" | {{sortname|Bong|Go}}
| [[Partido Demokratiko Pilipino|PDP]]
| 2
| Minority
|-
| {{party color cell|Independent politician}}
| align="left" | {{sortname|Panfilo|Lacson}}
| [[Independent politician|Independent]]
| 1
| Majority
|-
| {{party color cell|Nationalist People's Coalition}}
| align="left" | {{sortname|Lito|Lapid}}
| [[Nationalist People's Coalition|NPC]]
| 2
| Majority
|-
| {{party color cell|Independent politician}}
| align="left" | {{sortname|Rodante|Marcoleta}}
| [[Independent politician|Independent]]
| 1
| Minority
|-
| {{party color cell|Nacionalista Party}}
| align="left" | {{sortname|Imee|Marcos}}
| [[Nacionalista Party|Nacionalista]]
| 2
| Minority
|-
| {{party color cell|Liberal Party (Philippines)}}
| align="left" | {{sortname|Kiko|Pangilinan}}
| [[Liberal Party (Philippines)|Liberal]]
| 1
| Majority
|-
| {{party color cell|Nationalist People's Coalition}}
| align="left" | {{sortname|Tito|Sotto}}
| [[Nationalist People's Coalition|NPC]]
| 1
| Majority
|-
| {{party color cell|Lakas–CMD}}
| align="left" | {{sortname|Erwin|Tulfo}}
| [[Lakas–CMD|Lakas]]
| 1
| Majority
|-
| {{party color cell|Nacionalista Party}}
| align="left" | {{sortname|Camille|Villar}}
| [[Nacionalista Party|Nacionalista]]
| 1
| Majority
|}
{{notelist}}

=== Per bloc and party ===
{| class="wikitable" style="text-align:center"
|+
! rowspan="2" colspan="2" | Party
! colspan="2" |Bloc
! colspan="2" |Total
|-
!Majority
!Minority
! Seats
! %
|-
| {{Party name with colour|Nationalist People's Coalition}}
|5
|1
| '''6'''
| 25%
|-
| {{Party name with colour|Nacionalista Party}}
|3
|1
| '''4'''
| 17%
|-
| {{Party name with colour|Partido Demokratiko Pilipino}}
|0
|3
| '''3'''
| 13%
|-
| {{Party name with colour|Akbayan}}
|1
|0
| '''1'''
| 4%
|-
| {{Party name with colour|Katipunan ng Nagkakaisang Pilipino}}
|1
|0
| '''1'''
| 4%
|-
| {{Party name with colour|Lakas–CMD}}
|1
|0
| '''1'''
| 4%
|-
| {{Party name with colour|Liberal Party (Philippines)}}
|1
|0
| '''1'''
| 4%
|-
| {{Party name with colour|Pwersa ng Masang Pilipino}}
|0
|1
| '''1'''
| 4%
|-
| {{Party name with colour|Independent politician}}
|3
|3
| '''6'''
| 25%
|-
! colspan="2" | Total
!15
!9
! 24
! 100%
|}

==Seat==
[[File:GSIS Building (Pasay; 12-13-2020).jpg|thumb|The [[GSIS Building]] (pictured in 2020), the current seat of the Philippine Senate]]
[[File:Montalban renaming from Rodriguez - House Bill 8899 - Senate of the Philippines Session 36 18th Congress - 27 January 2022.webm|280px|thumb|right|A Senate session during the [[18th Congress of the Philippines|18th Congress]] inside the GSIS Building with other senators on remote locations via virtual conference during the [[COVID-19 pandemic in the Philippines|COVID-19 pandemic]], January 27, 2022.]]

The Senate currently meets at the [[GSIS Building]] along [[Jose W. Diokno Boulevard]] in [[Pasay]]. Built on land reclaimed from [[Manila Bay]], the Senate shares the complex with the [[Government Service Insurance System]] (GSIS).

The Senate previously met at the [[Old Legislative Building (Manila)|Old Legislative Building]] in [[Manila]] until May 1997. The Senate occupied the upper floors (the session hall now restored to its semi-former glory) while the House of Representatives occupied the lower floors (now occupied by the permanent exhibit of [[Juan Luna]]'s [[Spoliarium]] as the museum's centerpiece), with the [[National Library of the Philippines|National Library]] at the basement. When the Legislative Building was ruined in World War II, the House of Representatives temporarily met at the Old Japanese Schoolhouse at Lepanto Street (modern-day S. H. Loyola Street),<ref>{{cite book|title=Quezon Memorial Book|date=1952|publisher=Quezon Memorial Committee}}</ref> while the Senate's temporary headquarters was at the half-ruined [[Manila City Hall]].<ref>Towards the south side, opposite the base of the famous clocktower. {{Cite web |last=Birns |first=Jack |last2=Tewell |first2=John |date=1948 |title=Congress of the Philippines, Senate, Manila, Philippines |url=https://www.flickr.com/photos/johntewell/20260722109/ |website=Flickr |postscript=,}} and {{Cite web |last=Birns |first=Jack |last2=Tewell |first2=John |date=May 1948 |title=Temporary Senate headquarters after WWII, Manila City Hall, Manila, Philippines |url=https://www.flickr.com/photos/johntewell/12627824664/ |website=Flickr }}</ref> Congress then returned to the Legislative Building in 1950 upon its reconstruction. When President [[Ferdinand Marcos]] dissolved Congress in 1972, he built a new legislative complex in [[Quezon City]]. The unicameral parliament known as the [[Batasang Pambansa]] eventually met there in 1978. With the restoration of the bicameral legislature in 1987, the House of Representatives inherited the complex at Quezon City, now called the [[Batasang Pambansa Complex]], while the Senate returned to the Congress Building, until the GSIS Building was finished in 1997. Thus, the country's two houses of Congress meet at different places in [[Metro Manila]].

The Senate would eventually move to the [[New Senate Building (Philippines)|New Senate Building]] at the Navy Village in [[Fort Bonifacio (barangay)|Fort Bonifacio]], [[Taguig]] by 2025 at the earliest.<ref name="chiz">{{cite news|url=https://www.abs-cbn.com/news/2024/5/27/chiz-senate-won-t-move-to-new-building-this-year-1626|title=Escudero: Senate won't move to new building this year|first=RG|last=Cruz|date=May 27, 2024|access-date=May 27, 2024|work=ABS-CBN News |url-status=live |archive-url=https://archive.today/20250205034253/https://www.abs-cbn.com/news/2024/5/27/chiz-senate-won-t-move-to-new-building-this-year-1626 |archive-date= 5 February 2025 }}</ref> As the Senate has rented GSIS for the office space, it asked the [[Bases Conversion and Development Authority]] (BCDA) to present suitable sites for it to move to, with the Senate eyeing the Navy Village property along [[Lawton Avenue]] as its favored site.<ref>{{cite news|title=Senate to move to Bonifacio Global City in Taguig by 2020 |url-access=subscription|url=http://www.manilatimes.net/senate-move-bonifacio-global-city-taguig-2020/308688/|access-date=29 January 2017|work=The Manila Times Online |date=2017-01-25 |first1=Jefferson |last1=Antiporda |url-status=live |archive-url=https://web.archive.org/web/20170125110421/http://www.manilatimes.net/senate-move-bonifacio-global-city-taguig-2020/308688/ |archive-date= Jan 25, 2017 }}</ref> In 2018, a building designed by [[AECOM]] was chosen as winner for the new home for the Senate and was expected to be built by 2022. Civil works to erect the building had been awarded to Hilmarcs Construction Corporation, the same company the Senate investigated for alleged overpriced construction of the [[Makati]] City Hall Parking Building II in 2015.<ref>{{cite web| url = https://newsinfo.inquirer.net/1097256/controversial-contractor-to-build-new-senate-home |first1= Marlon |last1=Ramos |website=Inquirer News | title = Controversial contractor to build new Senate home| date = March 19, 2019}}</ref> The reception to the design was mixed, with some Filipino netizens comparing it to a [[waste container|garbage can]].<ref>{{cite news|title=Lacson defends construction of new Senate Building in Bonifacio|access-date=August 22, 2019|url=https://mb.com.ph/2019/03/22/lacson-defends-construction-of-new-senate-building-in-fort-bonifacio/}}</ref> By early 2021, the New Senate Building's construction was delayed due to the [[COVID-19 pandemic in the Philippines]].<ref name=MB>{{cite news |last=Terrazola |first=Vanne Elaine |title=Sotto says conversion of new Senate building to hospital up to next batch of senators |url=https://mb.com.ph/2021/02/20/sotto-says-conversion-of-new-senate-building-to-hospital-up-to-next-batch-of-senators/ |access-date=October 6, 2021 |work=Manila Bulletin |date=February 20, 2021}}</ref>

==Recent elections==
These are the two recent elections that determined the current membership of the [[20th Congress of the Philippines]].

===2025===
{{main|2025 Philippine Senate election}}
{{2025 Philippine Senate election results}}

===2022===
{{main|2022 Philippine Senate election}}
{{2022 Philippine Senate election results}}

==Historical makeup==
{{see also|List of legislatures of the Philippines}}
This is how the Senate looked like after the beginning of every Congress under the 1987 Constitution. The parties are arranged alphabetically, with independents at the rightmost side. Vacancies are denoted by dashes after the independents. Senators may switch parties or become independents mid-term.
{{col-begin}}{{col-break}}
{|class=wikitable style="text-align:center; font-size:95%"
! Congress !!width=20px| 1 !!width=20px| 2 !!width=20px| 3 !!width=20px| 4 !!width=20px| 5 !!width=20px| 6 !!width=20px| 7 !!width=20px| 8 !!width=20px| 9 !!width=20px| 10 !!width=20px| 11 !!width=20px| 12 !!width=20px| 13 !!width=20px| 14 !!width=20px| 15 !!width=20px| 16 !!width=20px| 17 !!width=20px| 18 !!width=20px| 19 !!width=20px| 20 !!width=20px| 21 !!width=20px| 22 !!width=20px| 23 !!width=20px| 24
<!--
|-
!colspan=25|Commonwealth of the Philippines
|-
|[[1st Congress of the Commonwealth of the Philippines|1st]] (1945)
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|—
|—
|-
|[[2nd Congress of the Commonwealth of the Philippines|2nd]] (1946)
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Popular Front (Philippines)}}
|-
!colspan=25|Republic of the Philippines
|-
|[[1st Congress of the Philippines|1st]] (1946–47)
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Popular Front (Philippines)}}
|-
|[[1st Congress of the Philippines|1st]] (1947–49)
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Popular Front (Philippines)}}
|-
|[[2nd Congress of the Philippines|2nd]] (1949–51)
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Popular Front (Philippines)}}
|—
|-
|[[2nd Congress of the Philippines|2nd]] (1951–53)
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|-
|[[3rd Congress of the Philippines|3rd]] (1953–55)
|{{party color cell|Citizens' Party (Philippines)}}
|{{party color cell|Democratic Party (Philippines)}}
|{{party color cell|Democratic Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|—
|-
|[[3rd Congress of the Philippines|3rd]] (1955–57)
|{{party color cell|Citizens' Party (Philippines)}}
|{{party color cell|Democratic Party (Philippines)}}
|{{party color cell|Democratic Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|-
|[[4th Congress of the Philippines|4th]] (1957–59)
|{{party color cell|Citizens' Party (Philippines)}}
|{{party color cell|Democratic Party (Philippines)}}
|{{party color cell|Democratic Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|-
|[[4th Congress of the Philippines|4th]] (1959–61)
|{{party color cell|Citizens' Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|-
|[[5th Congress of the Philippines|5th]] (1961–63)
|{{party color cell|Citizens' Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Progressive Party (Philippines)}}
|{{party color cell|Progressive Party (Philippines)}}
|-
|[[5th Congress of the Philippines|5th]] (1963–65)
|{{party color cell|Citizens' Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Progressive Party (Philippines)}}
|{{party color cell|Progressive Party (Philippines)}}
|-
|[[Interim Batasang Pambansa|IBP]] (1978–84) ||colspan=24 rowspan=2|Parliament was [[unicameral]].
|-
|[[Regular Batasang Pambansa|RBP]] (1984–86) -->
|-
|[[8th Congress of the Philippines|8th]] (1987–92)
|{{party color cell|Grand Alliance for Democracy}}
|{{party color cell|Grand Alliance for Democracy}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|{{party color cell|Lakas ng Bayan}}
|-
|[[9th Congress of the Philippines|9th]] (1992–95)
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|-
|[[10th Congress of the Philippines|10th]] (1995–98)
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|People's Reform Party}}
|-
|[[11th Congress of the Philippines|11th]] (1998–2001)
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|People's Reform Party}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|—
|-
|[[12th Congress of the Philippines|12th]] (2001–04)
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|-
|[[13th Congress of the Philippines|13th]] (2004–07)
|{{party color cell|Aksyon Demokratiko}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|People's Reform Party}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|—
|-
|[[14th Congress of the Philippines|14th]] (2007–10)
|{{party color cell|Kabalikat ng Malayang Pilipino}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|People's Reform Party}}
|{{party color cell|United Opposition (Philippines)}}
|{{party color cell|United Opposition (Philippines)}}
|{{party color cell|Independent}}
|—
|-
|[[15th Congress of the Philippines|15th]] (2010–13)
|{{party color cell|Lakas-Kampi-CMD}}
|{{party color cell|Lakas-Kampi-CMD}}
|{{party color cell|Lakas-Kampi-CMD}}
|{{party color cell|Lakas-Kampi-CMD}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|People's Reform Party}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|—
|-
|[[16th Congress of the Philippines|16th]] (2013–16)
|{{party color cell|Lakas-CMD}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|People's Reform Party}}
|{{party color cell|United Nationalist Alliance}}
|{{party color cell|United Nationalist Alliance}}
|{{party color cell|United Nationalist Alliance}}
|{{party color cell|United Nationalist Alliance}}
|{{party color cell|United Nationalist Alliance}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|-
|[[17th Congress of the Philippines|17th]] (2016–19)
|{{party color cell|Akbayan Citizens' Action Party}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|United Nationalist Alliance}}
|{{party color cell|United Nationalist Alliance}}
|{{party color cell|United Nationalist Alliance}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|-
|[[18th Congress of the Philippines|18th]] (2019–22)
|{{party color cell|Akbayan Citizens' Action Party}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|United Nationalist Alliance}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|-
|[[19th Congress of the Philippines|19th]] (2022–2025)
|{{party color cell|Akbayan Citizens' Action Party}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Laban ng Demokratikong Pilipino}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|United Nationalist Alliance}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|-
|[[20th Congress of the Philippines|20th]] (2025–present)
|{{party color cell|Akbayan Citizens' Action Party}}
|{{party color cell|Katipunan ng Nagkakaisang Pilipino}}
|{{party color cell|Lakas-CMD}}
|{{party color cell|Liberal Party (Philippines)}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nacionalista Party}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Nationalist People's Coalition}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Partido Demokratiko Pilipino-Lakas ng Bayan}}
|{{party color cell|Pwersa ng Masang Pilipino}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|{{party color cell|Independent}}
|}{{col-break}}
*{{Legend inline|{{party color|Akbayan Citizens' Action Party}}|[[Akbayan]]}}
*{{Legend inline|{{party color|Aksyon Demokratiko}}|[[Aksyon Demokratiko|Aksyon]]}}
*{{Legend inline|{{party color|Grand Alliance for Democracy}}|[[Grand Alliance for Democracy|GAD]]}}
*{{Legend inline|{{party color|Kabalikat ng Malayang Pilipino}}|[[Kabalikat ng Malayang Pilipino|KAMPI]]}}
*{{Legend inline|{{party color|Katipunan ng Nagkakaisang Pilipino}}|[[KANP]]}}
*{{Legend inline|{{party color|Lakas-CMD}}|[[Lakas–CMD (1991)|Lakas (1991–2008)]]}}
*{{Legend inline|{{party color|Lakas-CMD}}|[[Lakas–CMD|Lakas (2008–present)]]}}
*{{Legend inline|{{party color|Lakas ng Bayan}}|[[Lakas ng Bayan]]}}
*{{Legend inline|{{party color|Laban ng Demokratikong Pilipino}}|[[Laban ng Demokratikong Pilipino|LDP]]}}
*{{Legend inline|{{party color|Liberal Party (Philippines)}}|[[Liberal Party (Philippines)|Liberal]]}}
*{{Legend inline|{{party color|Nacionalista Party}}|[[Nacionalista Party|Nacionalista]]}}
*{{Legend inline|{{party color|Nationalist People's Coalition}}|[[Nationalist People's Coalition|NPC]]}}
*{{Legend inline|{{party color|Partido Demokratiko Pilipino-Lakas ng Bayan}}|[[PDP–Laban]]}}
*{{Legend inline|{{party color|Pwersa ng Masang Pilipino}}|[[Pwersa ng Masang Pilipino|PMP]]/[[Laban ng Makabayang Masang Pilipino|LAMMP]]/[[Koalisyon ng Nagkakaisang Pilipino|KNP]]}}
*{{Legend inline|{{party color|People's Reform Party}}|[[People's Reform Party|PRP]]}}
*{{Legend inline|{{party color|United Nationalist Alliance}}|[[United Nationalist Alliance|UNA]]}}
*{{Legend inline|{{party color|United Opposition (Philippines)}}|[[United Opposition (Philippines)|UNO]]}}
*{{Legend inline|{{party color|Independent}}|[[Independent politician|Independent]]}}
{{col-end}}

==Prominent senators==
===Presidents of the Philippines===
{{see also|List of senators of the Philippines who ran for president}}
*[[Manuel L. Quezon]] – 2nd president of the Philippines and 1st Senate president; lobbied for a nationally-elected Senate, which was established in 1940
*[[Jose P. Laurel]] – 3rd president
*[[Sergio Osmeña]] – 4th president, 1st [[Speaker of the House of Representatives of the Philippines|Speaker of the House of Representatives]], and 1st vice president of the Philippines
*[[Manuel Roxas]] – 5th president, 2nd Senate president, and 2nd speaker of the House of Representatives; first Filipino to have served as chief of both the upper and lower house; recipient of the [[Quezon Service Cross]]
*[[Elpidio Quirino]] – 6th president and 2nd vice president
<!--Ramon Magsaysay was not a senator-->
*[[Carlos P. Garcia]] – 8th president and 4th vice president
<!--Diosdado Macapagal was not a senator-->
*[[Ferdinand Marcos]] – 10th president and 11th Senate president<!--
Corazon Aquino was not a senator
Fidel V. Ramos was not a senator-->
*[[Joseph Estrada]] – 13th president and 9th vice president
*[[Gloria Macapagal Arroyo]] – 14th president, 10th vice president (first female vice president), and 25th speaker of the House of Representatives (first female House speaker)
*[[Benigno Aquino III]] – 15th president<!--
Rodrigo Duterte was not a senator-->
*[[Bongbong Marcos]] – 17th president

===Vice Presidents of the Philippines===
*[[Fernando Lopez]] – 3rd and 7th vice president of the Philippines
*[[Emmanuel Pelaez]] – 6th vice president
*[[Salvador Laurel]] – 8th vice president
*[[Teofisto Guingona Jr.]] – 11th vice president
*[[Noli de Castro]] – 12th vice president

===Speakers of the House of Representatives===
*[[Quintín Paredes]] – 3rd speaker of the House of Representatives and 5th Senate president
*[[Gil Montilla]] – 4th speaker of the [[National Assembly of the Philippines|House of Representatives (National Assembly)]]
*[[José Yulo]] –  5th speaker of the [[National Assembly of the Philippines|House of Representatives (National Assembly)]]
* [[Benigno Aquino Sr.]] – speaker of the [[National Assembly (Second Philippine Republic)]]
* [[Jose Zulueta]] – 7th speaker of the House of Representatives and 9th Senate president
* [[Manny Villar]] – 18th speaker of the House of Representatives and 25th Senate president
* [[Alan Peter Cayetano]] – 26th speaker of the House of Representatives

===Chief Justices of the Philippines===
*[[José Yulo]] – 6th chief justice of the Philippines
*[[Marcelo Fernan]] – 18th chief justice and 20th Senate president; the first and only Filipino to have served as chief of the Senate and the judiciary

===Framers of the [[Constitution of the Philippines|1987 Philippine Constitution]]===
<!-- Alphabetical order by surname -->
*[[Domocao Alonto]] – lawyer, educator, author, traditional leader, and Islamic figure from [[Lanao del Sur]]
*[[Blas Ople]] – president of the 60th International Labour Conference of the [[International Labour Organization]] (ILO) and former secretary of foreign affairs
*[[Ambrosio Padilla]] – vice president of the [[Philippine Constitutional Commission of 1986|1986 Philippine Constitutional Commission]]
*[[Soc Rodrigo]] – playwright, poet, journalist, broadcaster, lawyer, and Marcos-era opposition leader
*[[Decoroso Rosales]] – member of the 1986 Philippine Constitutional Commission
*[[Lorenzo Sumulong]] – former [[president pro tempore of the Senate of the Philippines]]
<!-- Alphabetical order by surname -->

===Recipients of the [[Quezon Service Cross]] ===
*[[Benigno Aquino Jr.]] – Marcos-era opposition leader, husband of the 11th president [[Corazon C. Aquino]], and father of the 15th president Benigno S. Aquino III
*[[Miriam Defensor Santiago]] –  first Filipino to be [[2011 International Criminal Court judges election|elected]] as [[International Criminal Court]] judge, [[Ramon Magsaysay Award]] recipient, member of the [[International Development Law Organization]] International Advisory Council, and former presidential candidate.<ref>{{Cite web|url=https://www.senate.gov.ph/senators/sen_bio/santiago_bio.asp|title=Senator Miriam Defensor Santiago|publisher=Senate}}</ref><ref>{{Cite web|url=http://www.philstar.com/headlines/2016/01/23/1545386/miriam-join-bill-gates-elite-law-group|title=Miriam joins Bill Gates elite law group|publisher=Philstar}}</ref>

===Honorific senators===
These senators have been given [[honorific]]s from historians.
*[[Isabelo de los Reyes]] – nationalist, journalist and historian known as the "Father of the Philippine Labor Movement"<ref name="bragado">{{cite journal |last1=Bragado |first1=Erlinda |title="Sukimátem": Isabelo de los Reyes Revisited |journal=[[Philippine Studies (journal)|Philippine Studies]] |date=2002 |volume=50 |issue=1 |pages=50–75 |url=http://www.philippinestudies.net/files/journals/1/articles/2724/public/2724-2722-1-PB.pdf |access-date=20 February 2019}}</ref>
*[[Vicente Sotto]] – journalist known as the "Father of Cebuano Journalism"<ref>{{Cite web |last=Oaminal |first=Clarence Paul |title=Don Vicente Yap Sotto, father of Cebuano journalism, language and literature |url=https://www.philstar.com/the-freeman/opinion/2017/04/17/1686574/don-vicente-yap-sotto-father-cebuano-journalism-language-and-literature |access-date=2022-11-07 |website=Philstar.com}}</ref>

===Milestone senators===
Aside from [[Manuel Roxas]], who was the first Filipino to have served as chief of both the Senate and the House of Representatives, and [[Marcelo Fernan]], the first and only Filipino to have served as chief of the Senate and the judiciary, these senators below have garnered historic firsts or records in the chamber.
<!-- alphabetical order by surname -->
*[[Rodolfo Biazon]] – first, and to date only, former [[Chief of Staff of the Armed Forces of the Philippines]] to become a senator
*[[Hadji Butu]] – first Muslim senator
*[[Rogelio de la Rosa]] – first Filipino film actor to win as senator, paving the way for future Filipino entertainers-turned-politicians
*[[Franklin Drilon]] – the only senator to have held all four of the Senate's major leadership positions
*[[Loi Ejercito]] – first, and to date only, former [[First Spouse of the Philippines|First Lady]] to become a senator
*[[Santiago Fonacier]] – first non-[[Catholic Church|Catholic]] to become a senator (member of the [[Philippine Independent Church]])
*[[Risa Hontiveros]] – first [[Social democracy|social democratic]] politician to be elected to the Senate and the first female Senate Deputy Minority Leader
*[[Eva Estrada Kalaw]] – first [[List of female senators of the Philippines|female senator]] to be re-elected
*[[Panfilo Lacson]] – first [[Chief of the Philippine National Police]] to become a senator
*[[Loren Legarda]] – first female Senate Majority Leader and the second female Senate President Pro Tempore. She is currently the longest-serving female senator, having been elected for a fourth term in 2022.
*[[Geronima Pecson]] – first [[List of female senators of the Philippines|female senator]] of the Philippines
*[[Santanina Rasul]] – first Muslim woman elected to the Senate
*[[Tecla San Andres Ziga]] – first female [[Philippine Bar Examination|Bar]] topnotcher in the Philippines
*[[Tito Sotto]] – longest-serving senator (24 years and counting: 1992–2004, 2010–2022, 2025–present), first five-term senator
<!-- alphabetical order by surname -->

==References==
{{reflist}}

==External links==

* {{commons category-inline}}
*[http://www.senate.gov.ph Official Website]
*[http://www.gov.ph Official Government Portal]

{{Philippine Senate}}
{{Congress of the Philippines}}
{{Philippine political parties}}
{{20th Congress of the Philippines senators}}
{{PhilippineLegislatures}}
{{Legislatures of the Philippines}}
{{Philippines topics}}
{{National upper houses}}

[[Category:Senate of the Philippines| ]]
[[Category:1916 establishments in the Philippines]]
[[Category:National upper houses|Philippines]]