View source for Delaware's at-large congressional district

{{Short description|At-large U.S. House district for Delaware}}
{{use mdy dates|date=January 2023}}
{{See also|List of United States representatives from Delaware}}
{{Infobox U.S. congressional district
| state                    = Delaware
| district number          = AL
| image name               = delaware_at_large.png
| representative           = [[Sarah McBride]]
| party                    = Democratic
| residence                = Wilmington
| english area             = 2,489
| metric area              =
|distribution ref=<ref>{{cite web|url=https://www.statista.com/statistics/183624/urban-and-rural-population-in-the-us-in-2000/|title=Urban Rural Population United States in 2010 – Distribution|website=Statista|access-date=2018-05-07|url-status=live|archive-url=https://web.archive.org/web/20180201192849/https://www.statista.com/statistics/183624/urban-and-rural-population-in-the-us-in-2000/|archive-date=2018-02-01}}</ref>
| percent urban            = 83.3
| percent rural            = 16.7
| population               = 1,051,917
| population year          = 2024
| median income            = $87,534<ref>{{cite web |url=https://www.census.gov/mycd/?st=10 |title = My Congressional District}}</ref>
| percent white =	58.6
| percent hispanic = 	10.5
| percent black =	21.5
| percent more than one race =	4.3
| percent asian =	4.3
| percent other race =	0.8
| percent blue collar      =
| percent white collar     =
| percent gray collar      =
| cpvi                     = D+8<ref name=Cook>{{Cite web|title=2025 Cook PVI℠: District Map and List (119th Congress)|url=https://www.cookpolitical.com/cook-pvi/2025-partisan-voting-index/district-map-and-list|access-date=2025-04-05|website=Cook Political Report|language=en}}</ref>
}}

'''Delaware's at-large congressional district''' is a [[United States congressional district|congressional district]] that includes the entire [[U.S. state]] of [[Delaware]]. It is the nation's oldest congressional district, having existed uninterrupted since the [[1st United States Congress]] in 1789. It is also the most populous congressional district in the nation. [[Delaware]] has always had only one member of the [[United States House of Representatives]], except for a single decade from 1813 to 1823, when the state had two at-large members. The two seats were filled by a statewide ballot, with the two candidates receiving the highest votes being elected.

[[Mike Castle]], a [[Republican Party (United States)|Republican]] and former [[governor of Delaware]], held this seat from January 1993 until his retirement in January 2011, after his unsuccessful bid for the Republican nomination to [[2010 United States Senate special election in Delaware|run for U.S. Senator]]. Even as Delaware swung heavily [[Democratic Party (United States)|Democratic]] at the state and national level, Castle was usually reelected without serious difficulty. Since his retirement, however, the Democrats have held it with no substantive opposition.

The district is currently represented by [[Sarah McBride]], a Democrat, who was first elected in 2024. McBride is the first openly transgender person elected to Congress.

== Recent statewide results ==
{| class=wikitable
! Year
! Office
! Results

|-
! [[2000 United States presidential election in Delaware|2000]]
| [[2000 United States presidential election|President]]
| align="right" {{party shading/Democratic}}|[[Al Gore|Gore]] 55–42%

|-
! [[2004 United States presidential election in Delaware|2004]]
| [[2004 United States presidential election|President]]
| align="right" {{party shading/Democratic}}|[[John Kerry|Kerry]] 53–46%

|-
! [[2008 United States presidential election in Delaware|2008]]
| [[2008 United States presidential election|President]]
| align="right" {{party shading/Democratic}}|[[Barack Obama|Obama]] 62–37%

|-
! [[2012 United States presidential election in Delaware|2012]]
| [[2012 United States presidential election|President]]
| align="right" {{party shading/Democratic}}|[[Barack Obama|Obama]] 59–40%

|-
! [[2016 United States presidential election in Delaware|2016]]
| [[2016 United States presidential election|President]]
| align="right" {{party shading/Democratic}}|[[Hillary Clinton|Clinton]] 53–42%

|-
! [[2020 United States presidential election in Delaware|2020]]
| [[2020 United States presidential election|President]]
| align="right" {{party shading/Democratic}}|[[Joe Biden|Biden]] 59–40%

|-
! [[2024 United States presidential election in Delaware|2024]]
| [[2024 United States presidential election|President]]
| align="right" {{party shading/Democratic}}|[[Kamala Harris|Harris]] 56–42%
|}

== List of members representing the district ==
{{See also| List of United States representatives from Delaware|United States House of Representatives elections in Delaware}}

{| class="wikitable" style="text-align:center"
! Member
! Party
! Term
! Congress
! width=200|Electoral history

|- style="height:3em"
| align=left | [[File:ViningJohnM 0001.jpg|100px]]<br/>'''[[John Vining]]'''<br>{{Small|([[Dover, Delaware|Dover]])}}
| {{Party shading/Pro-Administration}} | Pro-<br>Administration
| nowrap | March 4, 1789 –<br/>March 3, 1793
| {{USCongressOrdinal|1|2}}
| [[1789 United States House of Representatives election in Delaware|Elected in 1789]].<br/>[[1790 United States House of Representatives election in Delaware|Re-elected in 1790]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:PattenJohn.jpg|100px]]<br/>'''[[John Patten (American politician)|John Patten]]'''<br>{{Small|([[Dover, Delaware|Dover]])}}
| {{Party shading/Anti-Administration}} | [[Anti-Administration Party (United States)|Anti-<br>Administration]]
| nowrap | March 4, 1793 –<br/>February 14, 1794
| {{USCongressOrdinal|3}}
| [[1792 United States House of Representatives election in Delaware|Elected in 1792]].<br/>Lost election contest.

|- style="height:3em"
| align=left | [[File:Henry Latimer US.gif|Henry Latimer|100px]]<br/>'''[[Henry Latimer (politician)|Henry Latimer]]'''<br>{{Small|([[Newport, Delaware|Newport]])}}
| {{Party shading/Pro-Administration}} | Pro-<br>Administration
| nowrap | February 14, 1794 –<br/>February 7, 1795
| {{USCongressOrdinal|3}}
| Won election contest.<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:PattenJohn.jpg|100px]]<br/>'''[[John Patten (American politician)|John Patten]]'''<br>{{Small|([[Dover, Delaware|Dover]])}}
| {{Party shading/Democratic-Republican}} |[[Democratic-Republican Party|Democratic-<br>Republican]]
| nowrap | March 4, 1795 –<br/>March 3, 1797
| {{USCongressOrdinal|4}}
| [[1794 United States House of Representatives election in Delaware|Elected in 1794]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:BayardJames ASr.jpg|100px]]<br/>'''[[James A. Bayard (politician, born 1767)|James A. Bayard]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Federalist}} | [[Federalist Party|Federalist]]
| nowrap | March 4, 1797 –<br/>March 3, 1803
| {{USCongressOrdinal|5|7}}
| [[1796 United States House of Representatives election in Delaware|Elected in 1796]].<br/>[[1796 United States House of Representatives election in Delaware|Re-elected in 1798]].<br/>[[1800 United States House of Representatives election in Delaware|Re-elected in 1800]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:Rodneycaesara3.jpg|100px]]<br/>'''[[Caesar Augustus Rodney]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Democratic-Republican}} | [[Democratic-Republican Party|Democratic-<br>Republican]]
| nowrap | March 4, 1803 –<br/>March 3, 1805
| {{USCongressOrdinal|8}}
| [[1802 United States House of Representatives election in Delaware|Elected in 1802]].<br/>Lost re-election.

|- style="height:3em"
| colspan="2" |''Vacant''
| nowrap | March 4, 1805 –<br/>October 1, 1805
| {{USCongressOrdinal|9}}
| [[James A. Bayard (politician, born 1767)|James A. Bayard]] was [[1804 United States House of Representatives election in Delaware|elected in 1804]] but declined to serve, having also been elected U.S. senator.

|- style="height:3em"
| align=left | [[File:John Madison Broom.jpg|100px]]<br/>'''[[James M. Broom]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Federalist}} | [[Federalist Party|Federalist]]
| nowrap | October 1, 1805 –<br/>October 6, 1807
| {{USCongressOrdinal|9|10}}
| [[1805 Delaware's at-large congressional district special election|Elected October 1, 1805 to finish Bayard's term]] and seated December 2, 1805.<br/>[[1806 United States House of Representatives election in Delaware|Re-elected in 1806]], but declined the seat.

|- style="height:3em"
| align=left | [[File:Vandykenjr.jpg|100px]]<br/>'''[[Nicholas Van Dyke (politician, born 1769)|Nicholas Van Dyke]]'''<br>{{Small|([[New Castle, Delaware|New Castle]])}}
| {{Party shading/Federalist}} | [[Federalist Party|Federalist]]
| nowrap | October 6, 1807 –<br/>March 3, 1811
| {{USCongressOrdinal|10|11}}
| [[1806 Delaware's at-large congressional district special election|Elected to finish Broom's term]].<br/>[[1808 United States House of Representatives election in Delaware|Re-elected in 1808]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:Ridgelyhm.jpg|100px]]<br/>'''[[Henry M. Ridgely]]'''<br>{{Small|([[Dover, Delaware|Dover]])}}
| {{Party shading/Federalist}} | [[Federalist Party|Federalist]]
| nowrap | March 4, 1811 –<br/>March 3, 1815
| {{USCongressOrdinal|12|13}}
| [[1810 United States House of Representatives election in Delaware|Elected in 1810]].<br/>[[1812 United States House of Representatives election in Delaware|Re-elected in 1812]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:Thomas Clayton US.jpg|100px]]<br/>'''[[Thomas Clayton]]'''<br>{{Small|([[Dover, Delaware|Dover]])}}
| {{Party shading/Federalist}} | [[Federalist Party|Federalist]]
| nowrap | March 4, 1815 –<br/>March 3, 1817
| {{USCongressOrdinal|14}}
| [[1814 United States House of Representatives election in Delaware|Elected in 1814]].<br/>Lost re-election.

|- style="height:3em"
| rowspan=2 align=left | [[File:LMcLane.jpg|100px]]<br/>'''[[Louis McLane]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Federalist}} | [[Federalist Party|Federalist]]{{Efn|Supported the Crawford faction in the [[1824 United States presidential election]]}}
| nowrap | March 4, 1817 –<br/>March 3, 1825
| rowspan=2 | {{USCongressOrdinal|15|19}}
| rowspan=2 | [[1816 United States House of Representatives election in Delaware|Elected in 1816]].<br/>[[1818 United States House of Representatives election in Delaware|Re-elected in 1818]].<br/>[[1820 United States House of Representatives election in Delaware|Re-elected in 1820]].<br/>[[1822 United States House of Representatives election in Delaware|Re-elected in 1822]].<br/>[[1824 United States House of Representatives election in Delaware|Re-elected in 1824]].<br/>[[1826 United States House of Representatives election in Delaware|Re-elected in 1826]] but declined to serve having been [[1827 United States Senate election in Delaware|elected U.S. senator]].

|- style="height:3em"
| {{Party shading/Jacksonian}} | [[Jacksonian Party (United States)|Jacksonian]]
| nowrap | March 4, 1825 –<br/>March 3, 1827

|- style="height:3em"
| colspan="2" |''Vacant''
| nowrap | March 3, 1827 –<br/>October 2, 1827
| {{USCongressOrdinal|20}}
|
|- style="height:3em"
| align=left | [[File:JohnsKenseyJr.jpg|100px]]<br/>'''[[Kensey Johns Jr.]]'''<br>{{Small|([[New Castle, Delaware|New Castle]])}}
| {{Party shading/Anti-Jacksonian}} | [[National Republican Party|Anti-<br>Jacksonian]]
| nowrap | October 2, 1827 –<br/>March 3, 1831
| {{USCongressOrdinal|20|21}}
| [[1827 Delaware's at-large congressional district special election|Elected October 2, 1827 to finish McLane's term]] and seated December 3, 1827.<br/>[[1828 United States House of Representatives election in Delaware|Re-elected in 1828]].<br/>Retired.

|- style="height:3em"
| rowspan=2 align=left | [[File:MilliganJohnJ.jpg|100px]]<br/>'''[[John J. Milligan]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Anti-Jacksonian}} | [[National Republican Party|Anti-<br>Jacksonian]]
| nowrap | March 4, 1831 –<br/>March 3, 1837
| rowspan=2 | {{USCongressOrdinal|22|25}}
| rowspan=2 | [[1830 United States House of Representatives election in Delaware|Elected in 1830]].<br/>[[1832 United States House of Representatives election in Delaware|Re-elected in 1832]].<br/>[[1834 United States House of Representatives election in Delaware|Re-elected in 1834]].<br/>[[1836 United States House of Representatives election in Delaware|Re-elected in 1836]].<br/>Lost re-election.

|- style="height:3em"
| {{Party shading/Whig}} | [[Whig Party (United States)|Whig]]
| nowrap | March 4, 1837 –<br/>March 3, 1839

|- style="height:3em"
| align=left | '''[[Thomas Robinson Jr.]]'''<br>{{Small|([[Georgetown, Delaware|Georgetown]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1839 –<br/>March 3, 1841
| {{USCongressOrdinal|26}}
| [[1838 United States House of Representatives election in Delaware|Elected in 1838]].<br/>Lost re-election.

|- style="height:3em"
| align=left |[[File:George B. Rodney (Delaware Congressman).jpg|100px]]<br/>'''[[George B. Rodney]]'''<br>{{Small|([[New Castle, Delaware|New Castle]])}}
| {{Party shading/Whig}} | [[Whig Party (United States)|Whig]]
| nowrap | March 4, 1841 –<br/>March 3, 1845
| {{USCongressOrdinal|27|28}}
| [[1840 United States House of Representatives election in Delaware|Elected in 1840]].<br/>[[1842 United States House of Representatives election in Delaware|Re-elected in 1842]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:John W. Houston.jpg|100px]]<br/>'''[[John W. Houston]]'''<br>{{Small|([[Georgetown, Delaware|Georgetown]])}}
| {{Party shading/Whig}} | [[Whig Party (United States)|Whig]]
| nowrap | March 4, 1845 –<br/>March 3, 1851
| {{USCongressOrdinal|29|31}}
| [[1844 United States House of Representatives election in Delaware|Elected in 1844]].<br/>[[1846 United States House of Representatives election in Delaware|Re-elected in 1846]].<br/>[[1848 United States House of Representatives election in Delaware|Re-elected in 1848]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:George R. Riddle - Brady-Handy.jpg|100px]]<br/>'''[[George R. Riddle]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1851 –<br/>March 3, 1855
| {{USCongressOrdinal|32|33}}
| [[1850 United States House of Representatives election in Delaware|Elected in 1850]].<br/>[[1852 United States House of Representatives election in Delaware|Re-elected in 1852]].<br/>Lost re-election.

|- style="height:3em"
| align=left | '''[[Elisha D. Cullen]]'''<br>{{Small|([[Georgetown, Delaware|Georgetown]])}}
| {{Party shading/Know Nothing}} | [[Know Nothing|Know <br>Nothing]]
| nowrap | March 4, 1855 –<br/>March 3, 1857
| {{USCongressOrdinal|34}}
| [[1854 United States House of Representatives election in Delaware|Elected in 1854]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:WilliamGWhiteley.jpg|100px]]<br/>'''[[William G. Whiteley]]'''<br>{{Small|([[New Castle, Delaware|New Castle]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1857 –<br/>March 3, 1861
| {{USCongressOrdinal|35|36}}
| [[1856 United States House of Representatives election in Delaware|Elected in 1856]].<br/>[[1858 United States House of Representatives election in Delaware|Re-elected in 1858]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:Hon. George P. Fisher, Del - NARA - 526255.jpg|100px]]<br/>'''[[George P. Fisher]]'''<br>{{Small|([[Dover, Delaware|Dover]])}}
| {{Party shading/Unionist}} | [[Unionist politician (American Civil War)|Union]]
| nowrap | March 4, 1861 –<br/>March 3, 1863
| {{USCongressOrdinal|37}}
| [[1860 United States House of Representatives election in Delaware|Elected in 1860]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:WilliamTemple.gif|William Temple|100px]]<br/>'''[[William Temple (politician)|William Temple]]'''<br>{{Small|([[Smyrna, Delaware|Smyrna]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1863 –<br/>May 28, 1863
| {{USCongressOrdinal|38}}
| [[1862 United States House of Representatives election in Delaware|Elected in 1862]].<br/>Died.

|- style="height:3em"
| colspan="2" |''Vacant''
| nowrap | May 28, 1863 –<br/>December 7, 1863
| {{USCongressOrdinal|38}}
|
|- style="height:3em"
| align=left | [[File:Nathaniel B. Smithers (Delaware Congressman).jpg|100px]]<br/>'''[[Nathaniel B. Smithers]]'''<br>{{Small|([[Dover, Delaware|Dover]])}}
| {{Party shading/Unionist}} | [[Unionist politician (American Civil War)|Union]]
| nowrap | December 7, 1863 –<br/>March 3, 1865
| {{USCongressOrdinal|38}}
| [[1863 Delaware's at-large congressional district special election|Elected to finish Temple's term]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:John A. Nicholson.jpeg|100px]]<br/>'''[[John A. Nicholson]]'''<br>{{Small|([[Dover, Delaware|Dover]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1865 –<br/>March 3, 1869
| {{USCongressOrdinal|39|40}}
| [[1864 United States House of Representatives election in Delaware|Elected in 1864]].<br/>[[1866 United States House of Representatives election in Delaware|Re-elected in 1866]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:BenjaminBiggs.png|Benjamin T. Biggs|100px]]<br/>'''[[Benjamin T. Biggs]]'''<br>{{Small|([[Summit Bridge, Delaware|Summit Bridge]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1869 –<br/>March 3, 1873
| {{USCongressOrdinal|41|42}}
| [[1868 United States House of Representatives election in Delaware|Elected in 1868]].<br/>[[1870 United States House of Representatives election in Delaware|Re-elected in 1870]].<br/>Retired.

|- style="height:3em"
| align=left | '''[[James R. Lofland]]'''<br>{{Small|([[Milford, Delaware|Milford]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | March 4, 1873 –<br/>March 3, 1875
| {{USCongressOrdinal|43}}
| [[1872 United States House of Representatives election in Delaware|Elected in 1872]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:James Williams Delaware representative - Brady-Handy.jpg|100px]]<br/>'''[[James Williams (Delaware politician)|James Williams]]'''<br>{{Small|([[Kenton, Delaware|Kenton]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1875 –<br/>March 3, 1879
| {{USCongressOrdinal|44|45}}
| [[1874 United States House of Representatives election in Delaware|Elected in 1874]].<br/>[[1876 United States House of Representatives election in Delaware|Re-elected in 1876]].<br/>Retired.

|- style="height:3em"
| align=left | '''[[Edward L. Martin]]'''<br>{{Small|([[Seaford, Delaware|Seaford]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1879 –<br/>March 3, 1883
| {{USCongressOrdinal|46|47}}
| [[1878 United States House of Representatives election in Delaware|Elected in 1878]].<br/>[[1880 United States House of Representatives election in Delaware|Re-elected in 1880]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:Charles B. Lore (Delaware Congressman).jpg|100px]]<br/>'''[[Charles B. Lore]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1883 –<br/>March 3, 1887
| {{USCongressOrdinal|48|49}}
| [[1882 United States House of Representatives election in Delaware|Elected in 1882]].<br/>[[1884 United States House of Representatives election in Delaware|Re-elected in 1884]].<br/>Retired.

|- style="height:3em"
| align=left |[[File:John B. Penington (Delaware Congressman).jpg|100px]]<br/>'''[[John B. Penington]]'''<br>{{Small|([[Dover, Delaware|Dover]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1887 –<br/>March 3, 1891
| {{USCongressOrdinal|50|51}}
| [[1886 United States House of Representatives election in Delaware|Elected in 1886]].<br/>[[1888 United States House of Representatives election in Delaware|Re-elected in 1888]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:JohnWCausey.jpg|100px]]<br/>'''[[John W. Causey]]'''<br>{{Small|([[Milford, Delaware|Milford]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1891 –<br/>March 3, 1895
| {{USCongressOrdinal|52|53}}
| [[1890 United States House of Representatives election in Delaware|Elected in 1890]].<br/>[[1892 United States House of Representatives election in Delaware|Re-elected in 1892]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:JonathanSWillis.jpg|100px]]<br/>'''[[Jonathan S. Willis]]'''<br>{{Small|([[Milford, Delaware|Milford]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | March 4, 1895 –<br/>March 3, 1897
| {{USCongressOrdinal|54}}
| [[1894 United States House of Representatives election in Delaware|Elected in 1894]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:L. Irving Handy (Delaware Congressman).jpg|100px]]<br/>'''[[L. Irving Handy]]'''<br>{{Small|([[Newark, Delaware|Newark]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1897 –<br/>March 3, 1899
| {{USCongressOrdinal|55}}
| [[1896 United States House of Representatives election in Delaware|Elected in 1896]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:Hoffeckerjohn.jpg|100px]]<br/>'''[[John H. Hoffecker]]'''<br>{{Small|([[Smyrna, Delaware|Smyrna]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | March 4, 1899 –<br/>June 16, 1900
| rowspan=3 | {{USCongressOrdinal|56}}
| [[1898 United States House of Representatives election in Delaware|Elected in 1898]].<br/>Died.

|- style="height:3em"
| colspan="2" |''Vacant''
| nowrap | June 16, 1900 –<br/>November 6, 1900
|
|- style="height:3em"
| align=left | '''[[Walter O. Hoffecker]]'''<br>{{Small|([[Smyrna, Delaware|Smyrna]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | November 6, 1900 –<br/>March 3, 1901
| [[1900 Delaware's at-large congressional district special election|Elected to finish his father's term]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:BallHeisler.jpg|100px]]<br/>'''[[L. Heisler Ball]]'''<br>{{Small|([[Faulkland, Delaware|Faulkland]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | March 4, 1901 –<br/>March 3, 1903
| {{USCongressOrdinal|57}}
| [[1900 United States House of Representatives election in Delaware|Elected in 1900]].<br/>Retired to [[1903 United States Senate election in Delaware|run for U.S. senator]].

|- style="height:3em"
| align=left | [[File:Henry Aydelotte Houston.jpg|100px]]<br/>'''[[Henry A. Houston]]'''<br>{{Small|([[Millsboro, Delaware|Millsboro]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1903 –<br/>March 3, 1905
| {{USCongressOrdinal|58}}
| [[1902 United States House of Representatives election in Delaware|Elected in 1902]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:Burtonhiram.jpg|100px]]<br/>'''[[Hiram R. Burton]]'''<br>{{Small|([[Lewes, Delaware|Lewes]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | March 4, 1905 –<br/>March 3, 1909
| {{USCongressOrdinal|59|60}}
| [[1904 United States House of Representatives election in Delaware|Elected in 1904]].<br/>[[1906 United States House of Representatives election in Delaware|Re-elected in 1906]].<br/>Lost renomination.

|- style="height:3em"
| align=left | [[File:William Henry Heald (Delaware Congressman).jpg|100px]]<br/>'''[[William H. Heald]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | March 4, 1909 –<br/>March 3, 1913
| {{USCongressOrdinal|61|62}}
| [[1908 United States House of Representatives election in Delaware|Elected in 1908]].<br/>[[1910 United States House of Representatives election in Delaware|Re-elected in 1910]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:FranklinBrockson (cropped).jpg|100px]]<br/>'''[[Franklin Brockson]]'''<br>{{Small|([[Clayton, Delaware|Clayton]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1913 –<br/>March 3, 1915
| {{USCongressOrdinal|63}}
| [[1912 United States House of Representatives election in Delaware|Elected in 1912]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:Thomas W. Miller.jpg|100px]]<br/>'''[[Thomas W. Miller]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | March 4, 1915 –<br/>March 3, 1917
| {{USCongressOrdinal|64}}
| [[1914 United States House of Representatives election in Delaware|Elected in 1914]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:Albert Fawcett Polk in 1917.jpg|100px]]<br/>'''[[Albert F. Polk]]'''<br>{{Small|([[Georgetown, Delaware|Georgetown]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1917 –<br/>March 3, 1919
| {{USCongressOrdinal|65}}
| [[1916 United States House of Representatives election in Delaware|Elected in 1916]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:Caleb R Layton 2.jpg|100px]]<br/>'''[[Caleb R. Layton]]'''<br>{{Small|([[Georgetown, Delaware|Georgetown]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | March 4, 1919 –<br/>March 3, 1923
| {{USCongressOrdinal|66|67}}
| [[1918 United States House of Representatives election in Delaware|Elected in 1918]].<br/>[[1920 United States House of Representatives election in Delaware|Re-elected in 1920]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:WilliamHBoyce.jpg|100px]]<br/>'''[[William H. Boyce]]'''<br>{{Small|([[Dover, Delaware|Dover]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1923 –<br/>March 3, 1925
| {{USCongressOrdinal|68}}
| [[1922 United States House of Representatives election in Delaware|Elected in 1922]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:RobertGHouston.jpg|100px]]<br/>'''[[Robert G. Houston]]'''<br>{{Small|([[Georgetown, Delaware|Georgetown]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | March 4, 1925 –<br/>March 3, 1933
| {{USCongressOrdinal|69|72}}
| [[1924 United States House of Representatives election in Delaware|Elected in 1924]].<br/>[[1926 United States House of Representatives election in Delaware|Re-elected in 1926]].<br/>[[1928 United States House of Representatives election in Delaware|Re-elected in 1928]].<br/>[[1930 United States House of Representatives election in Delaware|Re-elected in 1930]].<br/>Retired.

|- style="height:3em"
| align=left | [[File:Rep. Wilbur L. Adams (D-DE).jpg|100px]]<br/>'''[[Wilbur L. Adams]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | March 4, 1933 –<br/>January 3, 1935
| {{USCongressOrdinal|73}}
| [[1932 United States House of Representatives election in Delaware|Elected in 1932]].<br/>Retired to [[1934 United States Senate election in Delaware|run for U.S. senator]].

|- style="height:3em"
| align=left | [[File:Flickr - USCapitol - J. George Stewart (1).jpg|100px]]<br/>'''[[J. George Stewart]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | January 3, 1935 –<br/>January 3, 1937
| {{USCongressOrdinal|74}}
| [[1934 United States House of Representatives election in Delaware|Elected in 1934]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:Rep. William F. Allen (D-DE).jpg|100px]]<br/>'''[[William F. Allen (Delaware politician)|William F. Allen]]'''<br>{{Small|([[Seaford, Delaware|Seaford]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | January 3, 1937 –<br/>January 3, 1939
| {{USCongressOrdinal|75}}
| [[1936 United States House of Representatives election in Delaware|Elected in 1936]].<br/>Lost re-election.

|- style="height:3em"
| align=left | '''[[George S. Williams]]'''<br>{{Small|([[Millsboro, Delaware|Millsboro]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | January 3, 1939 –<br/>January 3, 1941
| {{USCongressOrdinal|76}}
| [[1938 United States House of Representatives election in Delaware|Elected in 1938]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:Rep. Philip A. Traynor (D-DE).jpg|100px]]<br/>'''[[Philip A. Traynor]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | January 3, 1941 –<br/>January 3, 1943
| {{USCongressOrdinal|77}}
| [[1940 United States House of Representatives election in Delaware|Elected in 1940]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:Rep. Earle D. Willey (R-DE).jpg|100px]]<br/>'''[[Earle D. Willey]]'''<br>{{Small|([[Dover, Delaware|Dover]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | January 3, 1943 –<br/>January 3, 1945
| {{USCongressOrdinal|78}}
| [[1942 United States House of Representatives election in Delaware|Elected in 1942]].<br/>Lost re-election.

|- style="height:3em"
| align=left | '''[[Philip A. Traynor]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | January 3, 1945 –<br/>January 3, 1947
| {{USCongressOrdinal|79}}
| [[1944 United States House of Representatives election in Delaware|Elected in 1944]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:J. Caleb Boggs.jpg|100px]]<br/>'''[[J. Caleb Boggs]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | January 3, 1947 –<br/>January 3, 1953
| {{USCongressOrdinal|80|82}}
| [[1946 United States House of Representatives election in Delaware|Elected in 1946]].<br/>[[1948 United States House of Representatives election in Delaware|Re-elected in 1948]].<br/>[[1950 United States House of Representatives election in Delaware|Re-elected in 1950]].<br/>Retired to [[1952 Delaware gubernatorial election|run for Governor of Delaware]].

|- style="height:3em"
| align=left | [[File:Herbert B. Warburton (Delaware Congressman).jpg|100px]]<br/>'''[[Herbert Warburton]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | January 3, 1953 –<br/>January 3, 1955
| {{USCongressOrdinal|83}}
| [[1952 United States House of Representatives election in Delaware|Elected in 1952]].<br/>Retired to [[1954 United States Senate election in Delaware|run for U.S. senator]].

|- style="height:3em"
| align=left | [[File:Harris B. McDowell, Jr..jpg|100px]]<br/>'''[[Harris McDowell]]'''<br>{{Small|([[Middletown, Delaware|Middletown]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | January 3, 1955 –<br/>January 3, 1957
| {{USCongressOrdinal|84}}
| [[1954 United States House of Representatives election in Delaware|Elected in 1954]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:Harry G. Haskell Jr. (Delaware Congressman).jpg|100px]]<br/>'''[[Harry G. Haskell Jr.]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | January 3, 1957 –<br/>January 3, 1959
| {{USCongressOrdinal|85}}
| [[1956 United States House of Representatives election in Delaware|Elected in 1956]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:Harris B. McDowell, Jr..jpg|100px]]<br/>'''[[Harris McDowell]]'''<br>{{Small|([[Middletown, Delaware|Middletown]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | January 3, 1959 –<br/>January 3, 1967
| {{USCongressOrdinal|86|89}}
| [[1958 United States House of Representatives election in Delaware|Elected in 1958]].<br/>[[1960 United States House of Representatives election in Delaware|Re-elected in 1960]].<br/>[[1962 United States House of Representatives election in Delaware|Re-elected in 1962]].<br/>[[1964 United States House of Representatives election in Delaware|Re-elected in 1964]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:Senator William V Roth.jpg|100px]]<br/>'''[[William Roth]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | January 3, 1967 –<br/>December 31, 1970
| {{USCongressOrdinal|90|91}}
| [[1966 United States House of Representatives election in Delaware|Elected in 1966]].<br/>[[1968 United States House of Representatives election in Delaware|Re-elected in 1968]].<br/>Retired to [[1970 United States Senate election in Delaware|run for U.S. senator]] and resigned after the election.

|- style="height:3em"
| colspan="2" |''Vacant''
| nowrap | December 31, 1970 –<br/>January 3, 1971
| {{USCongressOrdinal|91}}
|
|- style="height:3em"
| align=left | [[File:Pierre S. du Pont IV.jpg|100px]]<br/>'''[[Pete du Pont]]'''<br>{{Small|([[Rockland, Delaware|Rockland]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | January 3, 1971 –<br/>January 3, 1977
| {{USCongressOrdinal|92|94}}
| [[1970 United States House of Representatives election in Delaware|Elected in 1970]].<br/>[[1972 United States House of Representatives election in Delaware|Re-elected in 1972]].<br/>[[1974 United States House of Representatives election in Delaware|Re-elected in 1974]].<br/>Retired to [[1976 Delaware gubernatorial election|run for Governor of Delaware]].

|- style="height:3em"
| align=left | [[File:Thomas B. Evans, Jr..jpg|100px]]<br/>'''[[Thomas B. Evans Jr.]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | January 3, 1977 –<br/>January 3, 1983
| {{USCongressOrdinal|95|97}}
| [[1976 United States House of Representatives election in Delaware|Elected in 1976]].<br/>[[1978 United States House of Representatives election in Delaware|Re-elected in 1978]].<br/>[[1980 United States House of Representatives election in Delaware|Re-elected in 1980]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:Tom Carper 102nd Congressional portrait.jpg|100px]]<br/>'''[[Tom Carper]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | January 3, 1983 –<br/>January 3, 1993
| {{USCongressOrdinal|98|102}}
| [[1982 United States House of Representatives election in Delaware|Elected in 1982]].<br/>[[1984 United States House of Representatives election in Delaware|Re-elected in 1984]].<br/>[[1986 United States House of Representatives election in Delaware|Re-elected in 1986]].<br/>[[1988 United States House of Representatives election in Delaware|Re-elected in 1988]].<br/>[[1990 United States House of Representatives election in Delaware|Re-elected in 1990]].<br/>Retired to [[1992 Delaware gubernatorial election|run for Governor of Delaware]].

|- style="height:3em"
| align=left | [[File:Mike Castle official portrait.jpg|100px]]<br/>'''[[Mike Castle]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]
| nowrap | January 3, 1993 –<br/>January 3, 2011
| {{USCongressOrdinal|103|111}}
| [[1992 United States House of Representatives election in Delaware|Elected in 1992]].<br/>[[1994 United States House of Representatives election in Delaware|Re-elected in 1994]].<br/>[[1996 United States House of Representatives election in Delaware|Re-elected in 1996]].<br/>[[1998 United States House of Representatives election in Delaware|Re-elected in 1998]].<br/>[[2000 United States House of Representatives election in Delaware|Re-elected in 2000]].<br/>[[2002 United States House of Representatives election in Delaware|Re-elected in 2002]].<br/>[[2004 United States House of Representatives election in Delaware|Re-elected in 2004]].<br/>[[2006 United States House of Representatives election in Delaware|Re-elected in 2006]].<br/>[[2008 United States House of Representatives election in Delaware|Re-elected in 2008]].<br/>Retired to [[2010 United States Senate special election in Delaware|run for U.S. senator]].

|- style="height:3em"
| align=left | [[File:John C. Carney Jr. official portrait 112th Congress.jpg |100px]]<br/>'''[[John Carney (Delaware politician)|John Carney]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | January 3, 2011 –<br/>January 3, 2017
| {{USCongressOrdinal|112|114}}
| [[2010 United States House of Representatives election in Delaware|Elected in 2010]].<br/>[[2012 United States House of Representatives election in Delaware|Re-elected in 2012]].<br/>[[2014 United States House of Representatives election in Delaware|Re-elected in 2014]].<br/>Retired to [[2016 Delaware gubernatorial election|run for Governor of Delaware]].

|- style="height:3em"
| align=left | [[File:Lisa Blunt Rochester official photo.jpg|100px]]<br/>'''[[Lisa Blunt Rochester]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
| nowrap | January 3, 2017 –<br/>January 3, 2025
| {{USCongressOrdinal|115|118}}
| [[2016 United States House of Representatives election in Delaware|Elected in 2016]].<br/>[[2018 United States House of Representatives election in Delaware|Re-elected in 2018]].<br/>[[2020 United States House of Representatives election in Delaware|Re-elected in 2020]].<br />[[2022 United States House of Representatives election in Delaware|Re-elected in 2022]].<br/>Retired to run [[2024 United States Senate election in Delaware|for U.S. Senator]].
|-
|align=left |[[File:Representative Sarah McBride Official Portrait (slight crop).jpg|100px]]<br />'''[[Sarah McBride]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
|{{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]
|January 3, 2025–<br/>present
|{{USCongressOrdinal|119|present}}
|[[2024 United States House of Representatives election in Delaware|Elected in 2024]].
|}

=== Second at-large seat: 1813–1823 ===
From 1813 to 1823, Delaware elected two members of the United States House of Representatives. Both were elected statewide at-large. Four men held the second seat during that decade.

{| class="wikitable" style="text-align:center"
! Member
! Party
! Term
! Congress
! Electoral history

|- style="height:3em"
| align=left | '''[[Thomas Cooper (American politician, born 1764)|Thomas Cooper]]'''<br>{{Small|([[Georgetown, Delaware|Georgetown]])}}
| {{Party shading/Federalist}} | [[Federalist Party|Federalist]]
| nowrap | March 4, 1813 –<br/>March 3, 1817
| {{USCongressOrdinal|13|14}}
| [[1812 United States House of Representatives election in Delaware|Elected in 1812]].<br/>[[1814 United States House of Representatives election in Delaware|Re-elected in 1814]].<br/>Lost re-election.

|- style="height:3em"
| align=left | [[File:WillardHall.jpg|100px]]<br/>'''[[Willard Hall]]'''<br>{{Small|([[Dover, Delaware|Dover]])}}
| {{Party shading/Democratic-Republican}} | [[Democratic-Republican Party|Democratic-<br>Republican]]
| nowrap | March 4, 1817 –<br/>January 22, 1821
| {{USCongressOrdinal|15|16}}
| [[1816 United States House of Representatives election in Delaware|Elected in 1816]].<br/>[[1818 United States House of Representatives election in Delaware|Re-elected in 1818]].<br/>Lost re-election and resigned early.

|- style="height:3em"
| colspan="2" |''Vacant''
| nowrap | January 22, 1821 –<br/>March 3, 1821
| {{USCongressOrdinal|16}}
|
|- style="height:3em"
| align=left | [[File:Rodneycaesara3.jpg|100px]]<br/>'''[[Caesar Augustus Rodney]]'''<br>{{Small|([[Wilmington, Delaware|Wilmington]])}}
| {{Party shading/Democratic-Republican}} | [[Democratic-Republican Party|Democratic-<br>Republican]]
| nowrap | March 4, 1821 –<br/>January 24, 1822
| rowspan=3 | {{USCongressOrdinal|17}}
| [[1820 United States House of Representatives election in Delaware|Elected in 1820]].<br/>Resigned when elected U.S. senator.

|- style="height:3em"
| colspan="2" |''Vacant''
| nowrap | January 24, 1822 –<br/>October 1, 1822
|
|- style="height:3em"
| align=left | [[File:Daniel Rodney.jpg|100px]]<br/>'''[[Daniel Rodney]]'''<br>{{Small|([[Lewes, Delaware|Lewes]])}}
| {{Party shading/Federalist}} | [[Federalist Party|Federalist]]
| nowrap | October 1, 1822 –<br/>March 3, 1823
| [[1822 Delaware's at-large congressional district special election|Elected to finish his cousin's term]].<br/>Retired.

|}

== Electoral history ==
{{Expand list|date=July 2011}}

===1920===
{{Election box begin no change | title= [[1920 United States House of Representatives election in Delaware]]
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Caleb R. Layton]] (Incumbent)
 | votes      = 52,145
 | percentage = 56%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[James R. Clements]]
 | votes      = 40,206
 | percentage = 43%
}}
{{Election box candidate with party link no change
 | party      = Socialist Party of America
 | candidate  = Robert A. Walker
 | votes      = 1,063
 | percentage = .01%
}}
{{Election box candidate with party link no change
 | party      = Independent
 | candidate  = [[Howard T. Ennis]]
 | votes      = 196
 | percentage = .02%
}}
{{Election box total no change
 | votes      = 93,609
 | percentage = 100%
}}
{{Election box turnout no change
 | percentage =
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (US)
}}
{{Election box end}}

===1922===
{{Election box begin no change | title= [[1922 United States House of Representatives election in Delaware]]
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[William H. Boyce]]
 | votes      = 39,126
 | percentage = 54%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Caleb R. Layton]] (Incumbent)
 | votes      = 32,577
 | percentage = 45%
}}
{{Election box candidate with party link no change
 | party      = Independent
 | candidate  = [[Frank A. Houck]]
 | votes      = 908
 | percentage = .01%
}}
{{Election box total no change
 | votes      = 72,611
 | percentage = 100%
}}
{{Election box turnout no change
 | percentage =
}}
{{Election box gain with party link without swing
 | winner     = Democratic Party (US)
 | loser      = Republican Party (US)
}}
{{Election box end}}

===1924===
{{Election box begin no change | title= [[1924 United States House of Representatives election in Delaware]]
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Robert G. Houston]]
 | votes      = 51,536
 | percentage = 59%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[William H. Boyce]] (incumbent)
 | votes      = 35,943
 | percentage = 41%
}}
{{Election box candidate with party link no change
 | party      = Independent
 | candidate  = [[Florence Garvin]]
 | votes      = 519
 | percentage = 0.05
}}
{{Election box total no change
 | votes      = 87,998
 | percentage = 100%
}}
{{Election box turnout no change
 | percentage =
}}
{{Election box gain with party link without swing
 | winner     = Republican Party (US)
 | loser      = Democratic Party (US)
}}
{{Election box end}}

===1926===
{{Election box begin no change | title= [[1926 United States House of Representatives election in Delaware]]
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Robert G. Houston]] (incumbent)
 | votes      = 38,919
 | percentage = 52%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[Merrill H. Tilghman]]
 | votes      = 35,943
 | percentage = 48%
}}
{{Election box total no change
 | votes      = 74,862
 | percentage = 100%
}}
{{Election box turnout no change
 | percentage =
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (US)
}}
{{Election box end}}

===1928===
{{Election box begin no change | title= [[1928 United States House of Representatives election in Delaware]]
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Robert G. Houston]] (incumbent)
 | votes      = 66,361
 | percentage = 64%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = John M. Richardson
 | votes      = 38,045
 | percentage = 36%
}}
{{Election box total no change
 | votes      = 104,406
 | percentage = 100%
}}
{{Election box turnout no change
 | percentage =
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (US)
}}
{{Election box end}}

===1930===
{{Election box begin no change | title= [[1930 United States House of Representatives election in Delaware]]
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Robert G. Houston]] (incumbent)
 | votes      = 48,493
 | percentage = 56%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[John P. Le Fevre]]
 | votes      = 38,391
 | percentage = 44%
}}
{{Election box candidate with party link no change
 | party      = Independent
 | candidate  = Arnold Williams
 | votes      = 127
 | percentage = 0.01%
}}
{{Election box total no change
 | votes      = 87,011
 | percentage = 100%
}}
{{Election box turnout no change
 | percentage =
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (US)
}}
{{Election box end}}

===1932===
{{Election box begin no change | title= [[1932 United States House of Representatives election in Delaware]]
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[Wilbur L. Adams]]
 | votes      = 51,698
 | percentage = 46%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Reuben Satterthwaite Jr.]]
 | votes      = 48,841
 | percentage = 44%
}}
{{Election box candidate with party link no change
 | party      = Prohibition Party (US)
 | candidate  = [[Francis B. Short]]
 | votes      = 10,560
 | percentage = 9%
}}
{{Election box candidate with party link no change
 | party      = Socialist Party USA
 | candidate  = [[Edgar G. Shaeffer]]
 | votes      = 887
 | percentage = 0.08%
}}
{{Election box candidate with party link no change
 | party      = Communist Party USA
 | candidate  = [[Frank Rhoades]]
 | votes      = 110
 | percentage = 0.01%
}}
{{Election box total no change
 | votes      = 112,096
 | percentage = 100%
}}
{{Election box turnout no change
 | percentage =
}}
{{Election box gain with party link without swing
 | winner     = Democratic Party (US)
 | loser      = Republican Party (US)
}}
{{Election box end}}

===1934===
{{Election box begin no change | title= [[1934 United States House of Representatives election in Delaware]]
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[J. George Stewart]]
 | votes      = 52,829
 | percentage = 53%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[John C. Hazzard]]
 | votes      = 45,771
 | percentage = 46%
}}
{{Election box candidate with party link no change
 | party      = Socialist Party USA
 | candidate  = [[William A. Mayor]]
 | votes      = 404
 | percentage = 0.4%
}}
{{Election box candidate with party link no change
 | party      = Communist Party USA
 | candidate  = [[Joseph P. Daniels]]
 | votes      = 58
 | percentage = .006%
}}
{{Election box total no change
 | votes      = 99,062
 | percentage = 100%
}}
{{Election box turnout no change
 | percentage =
}}
{{Election box gain with party link without swing
 | winner     = Republican Party (US)
 | loser      = Democratic Party (US)
}}
{{Election box end}}

===1936===
{{Election box begin no change | title= [[1936 United States House of Representatives election in Delaware]]
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[William F. Allen (Delaware politician)|William F. Allen]]
 | votes      = 65,485
 | percentage = 52%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[J. George Stewart]] (incumbent)
 | votes      = 55,664
 | percentage = 44%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[James A. Ellison]]
 | votes      = 5,338
 | percentage = 4%
}}
{{Election box candidate with party link no change
 | party      = Socialist Party USA
 | candidate  = [[William A. Mayor]]
 | votes      = 176
 | percentage = 0.01%
}}
{{Election box total no change
 | votes      = 126,663
 | percentage = 100%
}}
{{Election box turnout no change
 | percentage =
}}
{{Election box gain with party link without swing
 | winner     = Democratic Party (US)
 | loser      = Republican Party (US)
}}
{{Election box end}}

===1938===
{{Election box begin no change | title= [[1938 United States House of Representatives election in Delaware]]
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[George S. Williams]]
 | votes      = 60,661
 | percentage = 56%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[William F. Allen (Delaware politician)|William F. Allen]] (incumbent)
 | votes      = 46,989
 | percentage = 43%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[William J. Highfield]]
 | votes      = 816
 | percentage = 0.07%
}}
{{Election box candidate with party link no change
 | party      = Progressive Party (US, 1924)
 | candidate  = [[Ralph L. Brown]]
 | votes      = 105
 | percentage = 0.01%
}}
{{Election box total no change
 | votes      = 108,571
 | percentage = 100%
}}
{{Election box turnout no change
 | percentage =
}}
{{Election box gain with party link without swing
 | winner     = Republican Party (US)
 | loser      = Democratic Party (US)
}}
{{Election box end}}

===1940===
{{Election box begin no change | title= [[1940 United States House of Representatives election in Delaware]]
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[Philip A. Traynor]]
 | votes      = 68,205
 | percentage = 51%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[George S. Williams]] (incumbent)
 | votes      = 64,384
 | percentage = 48%
}}
{{Election box candidate with party link no change
 | party      = Independent
 | candidate  = Royden C. Caulk
 | votes      = 816
 | percentage = 0.06%
}}
{{Election box total no change
 | votes      = 133,405
 | percentage = 100%
}}
{{Election box turnout no change
 | percentage =
}}
{{Election box gain with party link without swing
 | winner     = Democratic Party (US)
 | loser      = Republican Party (US)
}}
{{Election box end}}

===1980===
{{Election box begin no change
 | title      = [[1980 United States House of Representatives election in Delaware|1980 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/1980/1980Stat.htm#8|title= Office of the Clerk of the U.S. House of Representatives – 404|first= Office of the Clerk, U.S. House of|last= Representatives|website= clerk.house.gov|access-date= 2018-05-07|url-status= dead|archive-url= https://web.archive.org/web/20160325073333/http://clerk.house.gov/member_info/electionInfo/1980/1980Stat.htm#8|archive-date= 2016-03-25}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Tom Evans (Delaware politician)|Tom Evans]] (incumbent)
 | votes      = 133,842
 | percentage = 62%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = Robert Maxwell
 | votes      = 81,227
 | percentage = 37%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = Lawrence Sullivan
 | votes      = 1,506
 | percentage = 1%
}}
{{Election box total no change
 | votes      = 216,575
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (US)
}}
{{Election box end}}

===1982===
{{Election box begin no change
 | title      = [[1982 United States House of Representatives election in Delaware|1982 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/1982/1982Stat.htm#8|title= Office of the Clerk of the U.S. House of Representatives – 404|first= Office of the Clerk, U.S. House of|last= Representatives|website= clerk.house.gov|access-date= 2018-05-07|url-status= dead|archive-url= https://web.archive.org/web/20160304055919/http://clerk.house.gov/member_info/electionInfo/1982/1982Stat.htm#8|archive-date= 2016-03-04}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[Thomas R. Carper]]
 | votes      = 98,533
 | percentage = 52%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Tom Evans (Delaware politician)|Tom Evans]] (incumbent)
 | votes      = 87,153
 | percentage = 46%
}}
{{Election box candidate with party link no change
 | party      = American Party (1969)
 | candidate  = Mary Gies
 | votes      = 1,109
 | percentage = 1%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = Richard Cohen
 | votes      = 711
 | percentage = 0.38%
}}
{{Election box candidate with party link no change
 | party      = N/A
 | candidate  = David Nuttall
 | votes      = 558
 | percentage = 0.30%
}}
{{Election box total no change
 | votes      = 188,064
 | percentage = 100%
}}
{{Election box gain with party link without swing
 | winner     = Democratic Party (US)
 | loser      = Republican Party (US)
}}
{{Election box end}}

===1984===
{{Election box begin no change
 | title      = [[1984 United States House of Representatives election in Delaware|1984 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/1984/1984Stat.htm#8|title= Office of the Clerk of the U.S. House of Representatives – 404|first= Office of the Clerk, U.S. House of|last= Representatives|website= clerk.house.gov|access-date= 2018-05-07|url-status= dead|archive-url= https://web.archive.org/web/20150227193149/http://clerk.house.gov/member_info/electionInfo/1984/1984Stat.htm#8|archive-date= 2015-02-27}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[Thomas R. Carper]] (incumbent)
 | votes      = 142,070
 | percentage = 58%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = Elise du Pont
 | votes      = 100,650
 | percentage = 41%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = V. Luther Etzel
 | votes      = 294
 | percentage = 0.12%
}}
{{Election box total no change
 | votes      = 243,014
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Democratic Party (US)
}}
{{Election box end}}

===1986===
{{Election box begin no change
 | title      = [[1986 United States House of Representatives election in Delaware|1986 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/1986/1986Stat.htm#8|title= Office of the Clerk of the U.S. House of Representatives – 404|first= Office of the Clerk, U.S. House of|last= Representatives|website= clerk.house.gov|access-date= 2018-05-07|url-status= dead|archive-url= https://web.archive.org/web/20160325073336/http://clerk.house.gov/member_info/electionInfo/1986/1986Stat.htm#8|archive-date= 2016-03-25}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[Thomas R. Carper]] (incumbent)
 | votes      = 106,351
 | percentage = 66%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = Thomas Nueberger
 | votes      = 53,767
 | percentage = 33%
}}
{{Election box candidate with party link no change
 | party      = American Party (1969)
 | candidate  = Patrick Harrison
 | votes      = 639
 | percentage = 0.40%
}}
{{Election box total no change
 | votes      = 160,757
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Democratic Party (US)
}}
{{Election box end}}

===1988===
{{Election box begin no change
 | title      = [[1988 United States House of Representatives election in Delaware|1988 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/1988/1988Stat.htm#8|title= Office of the Clerk of the U.S. House of Representatives – 404|first= Office of the Clerk, U.S. House of|last= Representatives|website= clerk.house.gov|access-date= 2018-05-07|url-status= dead|archive-url= https://web.archive.org/web/20160317101658/http://clerk.house.gov/member_info/electionInfo/1988/1988Stat.htm#8|archive-date= 2016-03-17}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[Thomas R. Carper]] (incumbent)
 | votes      = 158,338
 | percentage = 68%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = James P. Krapf
 | votes      = 76,179
 | percentage = 32%
}}
{{Election box total no change
 | votes      = 234,517
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Democratic Party (US)
}}
{{Election box end}}

===1990===
{{Election box begin no change
 | title      = [[1990 United States House of Representatives election in Delaware|1990 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/1990/1990Stat.htm#8|title= Office of the Clerk of the U.S. House of Representatives – 404|first= Office of the Clerk, U.S. House of|last= Representatives|website= clerk.house.gov|access-date= 2018-05-07|url-status= dead|archive-url= https://web.archive.org/web/20160324045528/http://clerk.house.gov/member_info/electionInfo/1990/1990Stat.htm#8|archive-date= 2016-03-24}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[Thomas R. Carper]] (incumbent)
 | votes      = 116,274
 | percentage = 66%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = Ralph Williams
 | votes      = 58,037
 | percentage = 33%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = Richard Cohen
 | votes      = 3,121
 | percentage = 1%
}}
{{Election box candidate with party link no change
 | party      = N/A
 | candidate  = Write-ins
 | votes      = 3
 | percentage = <0.01%
}}
{{Election box total no change
 | votes      = 177,435
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Democratic Party (US)
}}
{{Election box end}}

===1992===
{{Election box begin no change
 | title      = [[1992 United States House of Representatives election in Delaware|1992 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/1992/1992Stat.htm#8|title= Office of the Clerk of the U.S. House of Representatives – 404|first= Office of the Clerk, U.S. House of|last= Representatives|website= clerk.house.gov|access-date= 2018-05-07|url-status= dead|archive-url= https://web.archive.org/web/20160326042543/http://clerk.house.gov/member_info/electionInfo/1992/1992Stat.htm#8|archive-date= 2016-03-26}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Mike Castle]]
 | votes      = 153,037
 | percentage = 55%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = S. B. Woo
 | votes      = 117,426
 | percentage = 43%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = Peggy Schmitt
 | votes      = 5,661
 | percentage = 2%
}}
{{Election box total no change
 | votes      = 276,124
 | percentage = 100%
}}
{{Election box gain with party link without swing
 | winner     = Republican Party (US)
 | loser      = Democratic Party (US)
}}
{{Election box end}}

===1994===
{{Election box begin no change
 | title      = [[1994 United States House of Representatives election in Delaware|1994 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/1994/1994Stat.htm#8|title= Office of the Clerk of the U.S. House of Representatives – 404|first= Office of the Clerk, U.S. House of|last= Representatives|website= clerk.house.gov|access-date= 2018-05-07|url-status= dead|archive-url= https://web.archive.org/web/20160304105825/http://clerk.house.gov/member_info/electionInfo/1994/1994Stat.htm#8|archive-date= 2016-03-04}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Mike Castle]] (incumbent)
 | votes      = 137,945
 | percentage = 71%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = Carol Ann DeSantis
 | votes      = 51,793
 | percentage = 27%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = Danny Ray Beaver
 | votes      = 3,866
 | percentage = 2%
}}
{{Election box candidate with party link no change
 | party      = Independent Party (Delaware)
 | candidate  = Donald M. Hockmuth
 | votes      = 1,404
 | percentage = 0.72%
}}
{{Election box total no change
 | votes      = 195,008
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (US)
}}
{{Election box end}}

===1996===
{{Election box begin no change
 | title      = [[1996 United States House of Representatives election in Delaware|1996 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/1996/1996Stat.htm#8|title= Office of the Clerk of the U.S. House of Representatives – 404|first= Office of the Clerk, U.S. House of|last= Representatives|website= clerk.house.gov|access-date= 2018-05-07|url-status= dead|archive-url= https://web.archive.org/web/20110610232742/http://clerk.house.gov/member_info/electionInfo/1996/1996Stat.htm#8|archive-date= 2011-06-10}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Mike Castle]] (incumbent)
 | votes      = 185,577
 | percentage = 70%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = Dennis E. Williams
 | votes      = 73,258
 | percentage = 27%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = George A. Jurgensen
 | votes      = 4,000
 | percentage = 2%
}}
{{Election box candidate with party link no change
 | party      = Constitution Party (US)
 | candidate  = Felicia B. Johnson
 | votes      = 3,009
 | percentage = 1%
}}
{{Election box candidate with party link no change
 | party      = Natural Law Party
 | candidate  = Bob Mattson
 | votes      = 987
 | percentage = 0.37%
}}
{{Election box total no change
 | votes      = 266,831
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (US)
}}
{{Election box end}}

===1998===
{{Election box begin no change
 | title      = [[1998 United States House of Representatives election in Delaware|1998 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/1998/1998Stat.htm#8|title= Office of the Clerk of the U.S. House of Representatives – 404|first= Office of the Clerk, U.S. House of|last= Representatives|website= clerk.house.gov|access-date= 2018-05-07|url-status= dead|archive-url= https://web.archive.org/web/20110610232447/http://clerk.house.gov/member_info/electionInfo/1998/1998Stat.htm#8|archive-date= 2011-06-10}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Mike Castle]] (incumbent)
 | votes      = 119,811
 | percentage = 66%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = Dennis E. Williams
 | votes      = 57,446
 | percentage = 32%
}}
{{Election box candidate with party link no change
 | party      = Constitution Party (US)
 | candidate  = James P. Webster
 | votes      = 2,411
 | percentage = 1%
}}
{{Election box candidate with party link no change
 | party      = Natural Law Party
 | candidate  = Kim Stanley Bemis
 | votes      = 859
 | percentage = 1%
}}
{{Election box candidate with party link no change
 | party      = N/A
 | candidate  = Write-ins
 | votes      = 2
 | percentage = <0.01%
}}
{{Election box total no change
 | votes      = 180,529
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (US)
}}
{{Election box end}}

===2000===
{{Election box begin no change
 | title      = [[2000 United States House of Representatives election in Delaware|2000 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/2000/2000Stat.htm#8|title= 2000 ELECTION STATISTICS|website= clerk.house.gov|access-date= 2018-05-07|url-status= live|archive-url= https://web.archive.org/web/20110721043215/http://clerk.house.gov/member_info/electionInfo/2000/2000Stat.htm#8 |archive-date= 2011-07-21}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Mike Castle]] (incumbent)
 | votes      = 211,797
 | percentage = 68%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = Micheal C. Miller
 | votes      = 96,488
 | percentage = 31%
}}
{{Election box candidate with party link no change
 | party      = Constitution Party (US)
 | candidate  = James P. Webster
 | votes      = 2,490
 | percentage = 0.5%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = Brad C. Thomas
 | votes      = 2,351
 | percentage = 0.5%
}}
{{Election box total no change
 | votes      = 313,126
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (US)
}}
{{Election box end}}

===2002===
{{Election box begin no change
 | title      = [[2002 United States House of Representatives election in Delaware|2002 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/2002/2002Stat.htm#8|title= 2002 ELECTION STATISTICS|website= clerk.house.gov|access-date= 2018-05-07|url-status= live|archive-url= https://web.archive.org/web/20070105011809/http://clerk.house.gov/member_info/electionInfo/2002/2002Stat.htm#8|archive-date= 2007-01-05}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Mike Castle]] (incumbent)
 | votes      = 164,605
 | percentage = 72%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = Micheal C. Miller
 | votes      = 61,011
 | percentage = 27%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = Brad C. Thomas
 | votes      = 2,789
 | percentage = 1%
}}
{{Election box total no change
 | votes      = 228,405
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (US)
}}
{{Election box end}}

===2004===
{{Election box begin no change
 | title      = [[2004 United States House of Representatives election in Delaware|2004 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/2004/2004Stat.htm#8|title= 2004 ELECTION STATISTICS|website= clerk.house.gov|access-date= 2018-05-07|url-status= live|archive-url= https://web.archive.org/web/20110610221936/http://clerk.house.gov/member_info/electionInfo/2004/2004Stat.htm#8 |archive-date= 2011-06-10}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Mike Castle]] (incumbent)
 | votes      = 245,978
 | percentage = 69%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = Paul Donnelly
 | votes      = 105,716
 | percentage = 30%
}}
{{Election box candidate with party link no change
 | party      = Independent Party of Delaware
 | candidate  = Maurice J. Barros (write-in)
 | votes      = 2,337
 | percentage = 0.5%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = William E. Morris
 | votes      = 2,014
 | percentage = 0.5%
}}
{{Election box total no change
 | votes      = 356,045
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (US)
}}
{{Election box end}}

===2006===
{{Election box begin no change
 | title      = [[2006 United States House of Representatives election in Delaware|2006 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://clerk.house.gov/member_info/electionInfo/2006/2006Stat.htm#8|title= 2006 Election Statistics|website= clerk.house.gov|access-date= 2018-05-07|url-status= live|archive-url= https://web.archive.org/web/20080130193327/http://clerk.house.gov/member_info/electionInfo/2006/2006Stat.htm#8|archive-date= 2008-01-30}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Mike Castle]] (incumbent)
 | votes      = 143,897
 | percentage = 57%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = Dennis Spivack
 | votes      = 97,565
 | percentage = 39%
}}
{{Election box candidate with party link no change
 | party      = Independent Party of Delaware
 | candidate  = Karen M. Hartley-Nagle
 | votes      = 5,769
 | percentage = 2%
}}
{{Election box candidate with party link no change
 | party      = Green Party of the United States
 | candidate  = [[Michael Berg (activist)|Michael Berg]]
 | votes      = 4,463
 | percentage = 2%
}}
{{Election box total no change
 | votes      = 251,694
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (US)
}}
{{Election box end}}

===2008===
{{Election box begin no change
 | title      = [[2008 United States House of Representatives election in Delaware|2008 Delaware's at-large congressional district election]]
}}
{{Election box winning candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Michael Castle|Mike Castle]] (incumbent)
 | votes      = 235,437
 | percentage = 61%
}}
{{Election box candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = Karen Hartley-Nagle
 | votes      = 146,434
 | percentage = 38%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = Mark Parks
 | votes      = 3,586
 | percentage = 1%
}}
{{Election box total no change
 | votes      = 385,457
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Republican Party (Delaware)
}}
{{Election box end}}

===2010===
{{Election box begin no change | title= [[2010 United States House of Representatives election in Delaware|2010 Delaware's at-large congressional district election]]
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[John Carney (Delaware politician)|John Carney]]
 | votes      = 173,543
 | percentage = 57%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = Glen Urquhart
 | votes      = 125,442
 | percentage = 41%
}}
{{Election box candidate with party link no change
 | party      = Independent Party of Delaware
 | candidate  = Earl R. Lofland
 | votes      = 3,704
 | percentage = 1%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = Brent Wangen
 | votes      = 1,986
 | percentage = 1%
}}
{{Election box candidate with party link no change
 | party      = Independent
 | candidate  = Jeffrey Brown
 | votes      = 961
 | percentage = 0.31%
}}
{{Election box total no change
 | votes      = 305,636
 | percentage = 100%
}}
{{Election box turnout no change
 | percentage =
}}
{{Election box gain with party link without swing
 | winner     = Democratic Party (US)
 | loser      = Republican Party (US)
}}
{{Election box end}}

===2012===
{{Election box begin no change
 | title      = [[2012 United States House of Representatives election in Delaware|2012 Delaware's at-large congressional district election]]<ref>{{cite web|url= http://elections.delaware.gov/results/html/election.shtml|title= State of Delaware Primary Election Official Results|publisher= State of Delaware|access-date= 2012-11-07|url-status= dead|archive-url= https://web.archive.org/web/20121107191852/http://elections.delaware.gov/results/html/election.shtml|archive-date= 2012-11-07}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[John Carney (Delaware politician)|John Carney]] (incumbent)
 | votes      = 249,905
 | percentage = 64%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = [[Tom Kovach]]
 | votes      = 129,749
 | percentage = 33%
}}
{{Election box candidate with party link no change
 | party      = Green Party of the United States
 | candidate  = Bernard August
 | votes      = 4,273
 | percentage = 2%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = Scott Gesty
 | votes      = 4,096
 | percentage = 1%
}}
{{Election box total no change
 | votes      = 388,023
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Democratic Party (US)
}}
{{Election box end}}

===2014===
{{Election box begin no change
 | title      = [[2014 United States House of Representatives election in Delaware|2014 Delaware's at-large congressional district election]]<ref name= "election_results">{{cite web |url= http://elections.delaware.gov/results/html/election.shtml |title= State of Delaware General Election (Official Results) |publisher= State of Delaware Election Commissioner |access-date= 2014-11-27 |url-status= dead |archive-url= https://web.archive.org/web/20141126151243/http://elections.delaware.gov/results/html/election.shtml |archive-date= 2014-11-26}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[John Carney (Delaware politician)|John Carney]] (incumbent)
 | votes      = 137,251
 | percentage = 59%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = Rose Izzo
 | votes      = 85,146
 | percentage = 37%
}}
{{Election box candidate with party link no change
 | party      = Green Party of the United States
 | candidate  = Bernard August
 | votes      = 4,801
 | percentage = 2%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = Scott Gesty
 | votes      = 4,419
 | percentage = 2%
}}
{{Election box total no change
 | votes      = 231,617
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Democratic Party (US)
}}
{{Election box end}}

===2016===
{{Election box begin no change
 | title      = [[2016 United States House of Representatives election in Delaware|2016 Delaware's at-large congressional district election]]<ref name= "election_results"/>
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[Lisa Blunt Rochester]]
 | votes      = 233,554
 | percentage = 56%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = Hans Reigle
 | votes      = 172,301
 | percentage = 41%
}}
{{Election box candidate with party link no change
 | party      = Green Party of the United States
 | candidate  = Mark Andrew Perri
 | votes      = 8,326
 | percentage = 2%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = Scott Gesty
 | votes      = 6,436
 | percentage = 2%
}}
{{Election box total no change
 | votes      = 420,617
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Democratic Party (US)
}}
{{Election box end}}

===2018===
{{Election box begin no change
 | title      = [[2018 United States House of Representatives election in Delaware|2018 Delaware's at-large congressional district election]]<ref name= "election_results"/>
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[Lisa Blunt Rochester]] (incumbent)
 | votes      = 227,353
 | percentage = 64.5%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = Scott Walker
 | votes      = 125,384
 | percentage = 35.5%
}}
{{Election box turnout no change
 | votes      = 352,737
 | percentage = 46.1%
}}
{{Election box total no change
 | votes      = 352,737
 | percentage = 100%
}}
{{Election box hold with party link without swing
 | winner     = Democratic Party (US)
}}
{{Election box end}}

===2020===
{{Election box begin no change
 | title      = [[2020 United States House of Representatives election in Delaware|2020 Delaware's at-large congressional district election]]<ref>{{cite web |title=2020 General Election Report |url=https://elections.delaware.gov/results/html/index.shtml?electionId=GE2020 |website=Delaware Department of Elections}}</ref>
}}
{{Election box winning candidate with party link no change
 | party      = Democratic Party (US)
 | candidate  = [[Lisa Blunt Rochester]] (incumbent)
 | votes      = 281,382
 | percentage = 57.63%
}}
{{Election box candidate with party link no change
 | party      = Republican Party (US)
 | candidate  = Lee Murphy
 | votes      = 196,392
 | percentage = 40.22%
}}
{{Election box candidate with party link no change
 | party      = Independent Party of Delaware
 | candidate  = Catherine S. Purcell
 | votes      = 6,682
 | percentage = 1.37%
}}
{{Election box candidate with party link no change
 | party      = Libertarian Party (US)
 | candidate  = David L. Rogers
 | votes      = 3,814
 | percentage = 0.78%
}}
{{Election box total no change
 | votes      = 488,270
 | percentage = 100%
}}
{{Election box hold with party link no swing
  | winner     = Democratic Party (United States)
}}
{{Election box end}}

===2022===
{{Election box begin no change
| title = [[2022 United States House of Representatives election in Delaware|2022 Delaware's at-large congressional district election]]<ref>{{cite web |title=2022 General Election Report |url=https://elections.delaware.gov/results/html/index.shtml?electionId=GE2022 |website=Delaware Department of Elections}}</ref>
}}
{{Election box winning candidate with party link no change|candidate=[[Lisa Blunt Rochester]] (incumbent)|party=Democratic Party (United States)|votes=178,416|percentage=55.4%}}
{{Election box candidate with party link no change|candidate=Lee Murphy|party=Republican Party (United States)|votes=138,201|percentage=42.9%}}
{{Election box candidate with party link no change|candidate=Cody McNutt|party=Libertarian Party (United States)|votes=3,074|percentage=0.9%}}
{{Election box candidate no change|candidate=David Rogers|party={{nowrap|Non-Partisan Delaware}}|votes=1,958|percentage=0.6%}}
{{Election box total no change
| votes =321,568 
| percentage =100% 
}}
{{Election box hold with party link no swing
  | winner     = Democratic Party (United States)
}}
{{Election box end}}

===2024===
{{Election box begin no change
| title = [[2024 United States House of Representatives election in Delaware|2024 Delaware's at-large congressional district election]]<ref>{{cite web|url=https://news.yahoo.com/news/sarah-mcbride-wins-delaware-primary-005241410.html|title=Delaware State Sen. Sarah McBride, John Whalen to face off for congressional seat in November|date=10 September 2024|access-date=10 September 2024}}</ref>
}}
{{Election box winning candidate with party link no change|party=Democratic Party (US)|candidate=[[Sarah McBride]]|votes=287,830|percentage=	57.9}}
{{Election box candidate with party link no change|party=Republican Party (US)|candidate=John Whalen|votes=209,606|percentage=42.1}}
{{Election box write-in with party link no change|votes=0|percentage=0.0}}
{{Election box total no change|votes=497,436|percentage=100.0}}
{{Election box end}}

==Notes==
{{Notelist}}

==References==
*{{Cite book |last=Barone |first=Michael |url=https://archive.org/details/almanacofamerica00mich_5 |title=The Almanac of American Politics |last2=Richard E. Cohen |publisher=National Journal Group |year=2005 |isbn=0-89234-112-2 |location=Washington |url-access=registration}}
*{{Cite book |last=Martin |first=Roger A. |title=Memoirs of the Senate |publisher=Roger A. Martin |year=1995 |location=Newark, DE}}
{{Reflist}}

== External links ==
* {{Cite web |title=Our Campaigns - United States - Delaware - DE - At-Large |url=https://www.ourcampaigns.com/ContainerDetail.html?ContainerID=390 |access-date=2021-01-14 |website=www.ourcampaigns.com}}

{{USCongDistStateDE}}
{{Authority control}}

[[Category:Congressional districts of Delaware|At-large]]
[[Category:At-large United States congressional districts]]
[[Category:Constituencies established in 1789]]
[[Category:1789 establishments in Delaware]]