The state government is primarily organized into several cabinet or administrative departments:<ref>Template:Cite book</ref><ref>Ohio Revised Code § 121.01 et seq. Ohio Revised Code § 5703.01 et seq. Ohio Revised Code § 3301.13.</ref>
The legislative branch, the Ohio General Assembly, is made up of two houses: the Senate and the House of Representatives. The House of Representatives is composed of 99 members elected from single-member districts of equal population. Each of the 33 senate districts is formed by combining three house districts. Senators serve four-year staggered terms and representatives serve two-year terms. The General Assembly, with the approval of the Governor, draws the U.S. congressional district lines for Ohio's 15 seats in the United States House of Representatives. The Ohio Apportionment Board draws state legislative district lines in Ohio.
In order to be enacted into law, a bill must be adopted by both houses of the General Assembly and signed by the Governor. If the Governor vetoes a bill, the General Assembly can override the veto with a three-fifths supermajority of both houses. A bill will also become a law if the Governor fails to sign or veto it within 10 days of its being presented. The session laws are published in the official Laws of Ohio.Template:Sfn These in turn have been codified in the Ohio Revised Code.Template:Sfn
The judicial branch is headed by the Ohio Supreme Court, which has one chief justice and six associate justices, each elected to staggered six-year terms.
There are several other levels of elected judiciary in the Ohio court system:
State court of claims, which has jurisdiction over all civil actions against the State of Ohio in situations in which the state has waived its sovereign immunity.
State courts of appeal (12 district appeals courts): These are the intermediate appellate courts.
County courts of common pleas: 88 county common pleas courtsTemplate:Spaced ndashThese are the principal courts of first instance for civil and criminal matters. In populous areas, there are often several divisions, such as general, juvenile, probate, and domestic relations.
Municipal courts and county courtsTemplate:Spaced ndashthese courts primarily handle minor matters, such as traffic adjudication and other misdemeanor and small claims.
Judges in Ohio are generally elected, except for the Court of Claims, for which judges sit by assignment of the chief justice. When there are temporary vacancies in elected judgeships, those vacancies are also filled by assignment by the chief justice.
There are also several levels of local government in Ohio: counties, municipalities (cities and villages), townships, special districts and school districts.
There are two kinds of incorporated municipalities, 251 cities and 681 villages.Template:Sfn<ref name="Ohio Secretary of State">Template:Cite book</ref><ref>Template:Cite web</ref> If a municipality has five thousand or more residents as of the last United States Census it is a city, otherwise it is a village.Template:Sfn<ref>Template:Cite web</ref> Municipalities have full home rule powers, may adopt a charter, ordinances and resolutions for self-government.Template:Sfn Each municipality chooses its own form of government, but most have elected mayors and city councils or city commissions. City governments provide much more extensive services than county governments, such as police forces and paid (as opposed to volunteer) fire departments.
The entire area of the state is encompassed by townships.Template:Sfn When the boundaries of a township are coterminous with the boundaries of a city or village, the township ceases to exist as a separate government (called a paper township).Template:Sfn Townships are governed by a three-member board of township trustees.Template:Sfn Townships may have limited home rule powers.Template:Sfn
There are more than 600 city, local, and exempted village school districts providing K-12 education in Ohio, as well as about four dozen joint vocation school districts which are separate from the K-12 districts. Each city school district, local school district, or exempted village school district is governed by an elected board of education.Template:Sfn A school district previously under state supervision (municipal school district) may be governed by a board whose members either are elected or appointed by the mayor of the municipality containing the greatest portion of the district's area.Template:Sfn