# Delaware's at-large congressional district

Delaware's at-large congressional district is a 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 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 run for U.S. Senator. Even as Delaware swung heavily 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

| Year | Office | Results |
| 2000 | President | Gore 55–42% |
| 2004 | President | Kerry 53–46% |
| 2008 | President | Obama 62–37% |
| 2012 | President | Obama 59–40% |
| 2016 | President | Clinton 53–42% |
| 2020 | President | Biden 59–40% |
| 2024 | President | Harris 56–42% |

## List of members representing the district

| Member | Party | Term | Congress | Electoral history |
| John Vining (Dover) | Pro- Administration | March 4, 1789 – March 3, 1793 | 1st 2nd | Elected in 1789. Re-elected in 1790. Retired. |
| John Patten (Dover) | Anti- Administration | March 4, 1793 – February 14, 1794 | 3rd | Elected in 1792. Lost election contest. |
| Henry Latimer (Newport) | Pro- Administration | February 14, 1794 – February 7, 1795 | 3rd | Won election contest. Lost re-election. |
| John Patten (Dover) | Democratic- Republican | March 4, 1795 – March 3, 1797 | 4th | Elected in 1794. Retired. |
| James A. Bayard (Wilmington) | Federalist | March 4, 1797 – March 3, 1803 | 5th 6th 7th | Elected in 1796. Re-elected in 1798. Re-elected in 1800. Lost re-election. |
| Caesar Augustus Rodney (Wilmington) | Democratic- Republican | March 4, 1803 – March 3, 1805 | 8th | Elected in 1802. Lost re-election. |
| Vacant | Vacant | March 4, 1805 – October 1, 1805 | 9th | James A. Bayard was elected in 1804 but declined to serve, having also been elected U.S. senator. |
| James M. Broom (Wilmington) | Federalist | October 1, 1805 – October 6, 1807 | 9th 10th | Elected October 1, 1805 to finish Bayard's term and seated December 2, 1805. Re-elected in 1806, but declined the seat. |
| Nicholas Van Dyke (New Castle) | Federalist | October 6, 1807 – March 3, 1811 | 10th 11th | Elected to finish Broom's term. Re-elected in 1808. Retired. |
| Henry M. Ridgely (Dover) | Federalist | March 4, 1811 – March 3, 1815 | 12th 13th | Elected in 1810. Re-elected in 1812. Retired. |
| Thomas Clayton (Dover) | Federalist | March 4, 1815 – March 3, 1817 | 14th | Elected in 1814. Lost re-election. |
| Louis McLane (Wilmington) | Federalist | March 4, 1817 – March 3, 1825 | 15th 16th 17th 18th 19th | Elected in 1816. Re-elected in 1818. Re-elected in 1820. Re-elected in 1822. Re-elected in 1824. Re-elected in 1826 but declined to serve having been elected U.S. senator. |
| Louis McLane (Wilmington) | Jacksonian | March 4, 1825 – March 3, 1827 | 15th 16th 17th 18th 19th | Elected in 1816. Re-elected in 1818. Re-elected in 1820. Re-elected in 1822. Re-elected in 1824. Re-elected in 1826 but declined to serve having been elected U.S. senator. |
| Vacant | Vacant | March 3, 1827 – October 2, 1827 | 20th | |
| Kensey Johns Jr. (New Castle) | Anti- Jacksonian | October 2, 1827 – March 3, 1831 | 20th 21st | Elected October 2, 1827 to finish McLane's term and seated December 3, 1827. Re-elected in 1828. Retired. |
| John J. Milligan (Wilmington) | Anti- Jacksonian | March 4, 1831 – March 3, 1837 | 22nd 23rd 24th 25th | Elected in 1830. Re-elected in 1832. Re-elected in 1834. Re-elected in 1836. Lost re-election. |
| John J. Milligan (Wilmington) | Whig | March 4, 1837 – March 3, 1839 | 22nd 23rd 24th 25th | Elected in 1830. Re-elected in 1832. Re-elected in 1834. Re-elected in 1836. Lost re-election. |
| Thomas Robinson Jr. (Georgetown) | Democratic | March 4, 1839 – March 3, 1841 | 26th | Elected in 1838. Lost re-election. |
| George B. Rodney (New Castle) | Whig | March 4, 1841 – March 3, 1845 | 27th 28th | Elected in 1840. Re-elected in 1842. Retired. |
| John W. Houston (Georgetown) | Whig | March 4, 1845 – March 3, 1851 | 29th 30th 31st | Elected in 1844. Re-elected in 1846. Re-elected in 1848. Retired. |
| George R. Riddle (Wilmington) | Democratic | March 4, 1851 – March 3, 1855 | 32nd 33rd | Elected in 1850. Re-elected in 1852. Lost re-election. |
| Elisha D. Cullen (Georgetown) | Know Nothing | March 4, 1855 – March 3, 1857 | 34th | Elected in 1854. Lost re-election. |
| William G. Whiteley (New Castle) | Democratic | March 4, 1857 – March 3, 1861 | 35th 36th | Elected in 1856. Re-elected in 1858. Retired. |
| George P. Fisher (Dover) | Union | March 4, 1861 – March 3, 1863 | 37th | Elected in 1860. Lost re-election. |
| William Temple (Smyrna) | Democratic | March 4, 1863 – May 28, 1863 | 38th | Elected in 1862. Died. |
| Vacant | Vacant | May 28, 1863 – December 7, 1863 | 38th | |
| Nathaniel B. Smithers (Dover) | Union | December 7, 1863 – March 3, 1865 | 38th | Elected to finish Temple's term. Lost re-election. |
| John A. Nicholson (Dover) | Democratic | March 4, 1865 – March 3, 1869 | 39th 40th | Elected in 1864. Re-elected in 1866. Retired. |
| Benjamin T. Biggs (Summit Bridge) | Democratic | March 4, 1869 – March 3, 1873 | 41st 42nd | Elected in 1868. Re-elected in 1870. Retired. |
| James R. Lofland (Milford) | Republican | March 4, 1873 – March 3, 1875 | 43rd | Elected in 1872. Lost re-election. |
| James Williams (Kenton) | Democratic | March 4, 1875 – March 3, 1879 | 44th 45th | Elected in 1874. Re-elected in 1876. Retired. |
| Edward L. Martin (Seaford) | Democratic | March 4, 1879 – March 3, 1883 | 46th 47th | Elected in 1878. Re-elected in 1880. Retired. |
| Charles B. Lore (Wilmington) | Democratic | March 4, 1883 – March 3, 1887 | 48th 49th | Elected in 1882. Re-elected in 1884. Retired. |
| John B. Penington (Dover) | Democratic | March 4, 1887 – March 3, 1891 | 50th 51st | Elected in 1886. Re-elected in 1888. Retired. |
| John W. Causey (Milford) | Democratic | March 4, 1891 – March 3, 1895 | 52nd 53rd | Elected in 1890. Re-elected in 1892. Retired. |
| Jonathan S. Willis (Milford) | Republican | March 4, 1895 – March 3, 1897 | 54th | Elected in 1894. Lost re-election. |
| L. Irving Handy (Newark) | Democratic | March 4, 1897 – March 3, 1899 | 55th | Elected in 1896. Lost re-election. |
| John H. Hoffecker (Smyrna) | Republican | March 4, 1899 – June 16, 1900 | 56th | Elected in 1898. Died. |
| Vacant | Vacant | June 16, 1900 – November 6, 1900 | 56th | |
| Walter O. Hoffecker (Smyrna) | Republican | November 6, 1900 – March 3, 1901 | 56th | Elected to finish his father's term. Retired. |
| L. Heisler Ball (Faulkland) | Republican | March 4, 1901 – March 3, 1903 | 57th | Elected in 1900. Retired to run for U.S. senator. |
| Henry A. Houston (Millsboro) | Democratic | March 4, 1903 – March 3, 1905 | 58th | Elected in 1902. Retired. |
| Hiram R. Burton (Lewes) | Republican | March 4, 1905 – March 3, 1909 | 59th 60th | Elected in 1904. Re-elected in 1906. Lost renomination. |
| William H. Heald (Wilmington) | Republican | March 4, 1909 – March 3, 1913 | 61st 62nd | Elected in 1908. Re-elected in 1910. Retired. |
| Franklin Brockson (Clayton) | Democratic | March 4, 1913 – March 3, 1915 | 63rd | Elected in 1912. Lost re-election. |
| Thomas W. Miller (Wilmington) | Republican | March 4, 1915 – March 3, 1917 | 64th | Elected in 1914. Lost re-election. |
| Albert F. Polk (Georgetown) | Democratic | March 4, 1917 – March 3, 1919 | 65th | Elected in 1916. Lost re-election. |
| Caleb R. Layton (Georgetown) | Republican | March 4, 1919 – March 3, 1923 | 66th 67th | Elected in 1918. Re-elected in 1920. Lost re-election. |
| William H. Boyce (Dover) | Democratic | March 4, 1923 – March 3, 1925 | 68th | Elected in 1922. Lost re-election. |
| Robert G. Houston (Georgetown) | Republican | March 4, 1925 – March 3, 1933 | 69th 70th 71st 72nd | Elected in 1924. Re-elected in 1926. Re-elected in 1928. Re-elected in 1930. Retired. |
| Wilbur L. Adams (Wilmington) | Democratic | March 4, 1933 – January 3, 1935 | 73rd | Elected in 1932. Retired to run for U.S. senator. |
| J. George Stewart (Wilmington) | Republican | January 3, 1935 – January 3, 1937 | 74th | Elected in 1934. Lost re-election. |
| William F. Allen (Seaford) | Democratic | January 3, 1937 – January 3, 1939 | 75th | Elected in 1936. Lost re-election. |
| George S. Williams (Millsboro) | Republican | January 3, 1939 – January 3, 1941 | 76th | Elected in 1938. Lost re-election. |
| Philip A. Traynor (Wilmington) | Democratic | January 3, 1941 – January 3, 1943 | 77th | Elected in 1940. Lost re-election. |
| Earle D. Willey (Dover) | Republican | January 3, 1943 – January 3, 1945 | 78th | Elected in 1942. Lost re-election. |
| Philip A. Traynor (Wilmington) | Democratic | January 3, 1945 – January 3, 1947 | 79th | Elected in 1944. Lost re-election. |
| J. Caleb Boggs (Wilmington) | Republican | January 3, 1947 – January 3, 1953 | 80th 81st 82nd | Elected in 1946. Re-elected in 1948. Re-elected in 1950. Retired to run for Governor of Delaware. |
| Herbert Warburton (Wilmington) | Republican | January 3, 1953 – January 3, 1955 | 83rd | Elected in 1952. Retired to run for U.S. senator. |
| Harris McDowell (Middletown) | Democratic | January 3, 1955 – January 3, 1957 | 84th | Elected in 1954. Lost re-election. |
| Harry G. Haskell Jr. (Wilmington) | Republican | January 3, 1957 – January 3, 1959 | 85th | Elected in 1956. Lost re-election. |
| Harris McDowell (Middletown) | Democratic | January 3, 1959 – January 3, 1967 | 86th 87th 88th 89th | Elected in 1958. Re-elected in 1960. Re-elected in 1962. Re-elected in 1964. Lost re-election. |
| William Roth (Wilmington) | Republican | January 3, 1967 – December 31, 1970 | 90th 91st | Elected in 1966. Re-elected in 1968. Retired to run for U.S. senator and resigned after the election. |
| Vacant | Vacant | December 31, 1970 – January 3, 1971 | 91st | |
| Pete du Pont (Rockland) | Republican | January 3, 1971 – January 3, 1977 | 92nd 93rd 94th | Elected in 1970. Re-elected in 1972. Re-elected in 1974. Retired to run for Governor of Delaware. |
| Thomas B. Evans Jr. (Wilmington) | Republican | January 3, 1977 – January 3, 1983 | 95th 96th 97th | Elected in 1976. Re-elected in 1978. Re-elected in 1980. Lost re-election. |
| Tom Carper (Wilmington) | Democratic | January 3, 1983 – January 3, 1993 | 98th 99th 100th 101st 102nd | Elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Re-elected in 1990. Retired to run for Governor of Delaware. |
| Mike Castle (Wilmington) | Republican | January 3, 1993 – January 3, 2011 | 103rd 104th 105th 106th 107th 108th 109th 110th 111th | Elected in 1992. Re-elected in 1994. Re-elected in 1996. Re-elected in 1998. Re-elected in 2000. Re-elected in 2002. Re-elected in 2004. Re-elected in 2006. Re-elected in 2008. Retired to run for U.S. senator. |
| John Carney (Wilmington) | Democratic | January 3, 2011 – January 3, 2017 | 112th 113th 114th | Elected in 2010. Re-elected in 2012. Re-elected in 2014. Retired to run for Governor of Delaware. |
| Lisa Blunt Rochester (Wilmington) | Democratic | January 3, 2017 – January 3, 2025 | 115th 116th 117th 118th | Elected in 2016. Re-elected in 2018. Re-elected in 2020. Re-elected in 2022. Retired to run for U.S. Senator. |
| Sarah McBride (Wilmington) | Democratic | January 3, 2025– present | 119th | 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.
| Member | Party | Term | Congress | Electoral history |
| Thomas Cooper (Georgetown) | Federalist | March 4, 1813 – March 3, 1817 | 13th 14th | Elected in 1812. Re-elected in 1814. Lost re-election. |
| Willard Hall (Dover) | Democratic- Republican | March 4, 1817 – January 22, 1821 | 15th 16th | Elected in 1816. Re-elected in 1818. Lost re-election and resigned early. |
| Vacant | Vacant | January 22, 1821 – March 3, 1821 | 16th | |
| Caesar Augustus Rodney (Wilmington) | Democratic- Republican | March 4, 1821 – January 24, 1822 | 17th | Elected in 1820. Resigned when elected U.S. senator. |
| Vacant | Vacant | January 24, 1822 – October 1, 1822 | 17th | |
| Daniel Rodney (Lewes) | Federalist | October 1, 1822 – March 3, 1823 | 17th | Elected to finish his cousin's term. Retired. |

## Electoral history
### 1920

1920 United States House of Representatives election in Delaware :
| Party | Party | Candidate | Votes | % |
| | Republican | Caleb R. Layton (Incumbent) | 52,145 | 56% |
| | Democratic | James R. Clements | 40,206 | 43% |
| | Socialist | Robert A. Walker | 1,063 | .01% |
| | Independent | Howard T. Ennis | 196 | .02% |
| Total votes | Total votes | Total votes | 93,609 | 100% |
| Turnout | Turnout | Turnout | | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1922

1922 United States House of Representatives election in Delaware :
| Party | Party | Candidate | Votes | % |
| | Democratic | William H. Boyce | 39,126 | 54% |
| | Republican | Caleb R. Layton (Incumbent) | 32,577 | 45% |
| | Independent | Frank A. Houck | 908 | .01% |
| Total votes | Total votes | Total votes | 72,611 | 100% |
| Turnout | Turnout | Turnout | | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1924

1924 United States House of Representatives election in Delaware :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert G. Houston | 51,536 | 59% |
| | Democratic | William H. Boyce (incumbent) | 35,943 | 41% |
| | Independent | Florence Garvin | 519 | 0.05 |
| Total votes | Total votes | Total votes | 87,998 | 100% |
| Turnout | Turnout | Turnout | | |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 1926

1926 United States House of Representatives election in Delaware :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert G. Houston (incumbent) | 38,919 | 52% |
| | Democratic | Merrill H. Tilghman | 35,943 | 48% |
| Total votes | Total votes | Total votes | 74,862 | 100% |
| Turnout | Turnout | Turnout | | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1928

1928 United States House of Representatives election in Delaware :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert G. Houston (incumbent) | 66,361 | 64% |
| | Democratic | John M. Richardson | 38,045 | 36% |
| Total votes | Total votes | Total votes | 104,406 | 100% |
| Turnout | Turnout | Turnout | | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1930

1930 United States House of Representatives election in Delaware :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert G. Houston (incumbent) | 48,493 | 56% |
| | Democratic | John P. Le Fevre | 38,391 | 44% |
| | Independent | Arnold Williams | 127 | 0.01% |
| Total votes | Total votes | Total votes | 87,011 | 100% |
| Turnout | Turnout | Turnout | | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1932

1932 United States House of Representatives election in Delaware :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wilbur L. Adams | 51,698 | 46% |
| | Republican | Reuben Satterthwaite Jr. | 48,841 | 44% |
| | Prohibition | Francis B. Short | 10,560 | 9% |
| | Socialist | Edgar G. Shaeffer | 887 | 0.08% |
| | Communist | Frank Rhoades | 110 | 0.01% |
| Total votes | Total votes | Total votes | 112,096 | 100% |
| Turnout | Turnout | Turnout | | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1934

1934 United States House of Representatives election in Delaware :
| Party | Party | Candidate | Votes | % |
| | Republican | J. George Stewart | 52,829 | 53% |
| | Democratic | John C. Hazzard | 45,771 | 46% |
| | Socialist | William A. Mayor | 404 | 0.4% |
| | Communist | Joseph P. Daniels | 58 | .006% |
| Total votes | Total votes | Total votes | 99,062 | 100% |
| Turnout | Turnout | Turnout | | |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 1936

1936 United States House of Representatives election in Delaware :
| Party | Party | Candidate | Votes | % |
| | Democratic | William F. Allen | 65,485 | 52% |
| | Republican | J. George Stewart (incumbent) | 55,664 | 44% |
| | Republican | James A. Ellison | 5,338 | 4% |
| | Socialist | William A. Mayor | 176 | 0.01% |
| Total votes | Total votes | Total votes | 126,663 | 100% |
| Turnout | Turnout | Turnout | | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1938

1938 United States House of Representatives election in Delaware :
| Party | Party | Candidate | Votes | % |
| | Republican | George S. Williams | 60,661 | 56% |
| | Democratic | William F. Allen (incumbent) | 46,989 | 43% |
| | Republican | William J. Highfield | 816 | 0.07% |
| | Progressive | Ralph L. Brown | 105 | 0.01% |
| Total votes | Total votes | Total votes | 108,571 | 100% |
| Turnout | Turnout | Turnout | | |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 1940

1940 United States House of Representatives election in Delaware :
| Party | Party | Candidate | Votes | % |
| | Democratic | Philip A. Traynor | 68,205 | 51% |
| | Republican | George S. Williams (incumbent) | 64,384 | 48% |
| | Independent | Royden C. Caulk | 816 | 0.06% |
| Total votes | Total votes | Total votes | 133,405 | 100% |
| Turnout | Turnout | Turnout | | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1980

1980 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Republican | Tom Evans (incumbent) | 133,842 | 62% |
| | Democratic | Robert Maxwell | 81,227 | 37% |
| | Libertarian | Lawrence Sullivan | 1,506 | 1% |
| Total votes | Total votes | Total votes | 216,575 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1982

1982 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Thomas R. Carper | 98,533 | 52% |
| | Republican | Tom Evans (incumbent) | 87,153 | 46% |
| | American | Mary Gies | 1,109 | 1% |
| | Libertarian | Richard Cohen | 711 | 0.38% |
| | N/A | David Nuttall | 558 | 0.30% |
| Total votes | Total votes | Total votes | 188,064 | 100% |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1984

1984 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Thomas R. Carper (incumbent) | 142,070 | 58% |
| | Republican | Elise du Pont | 100,650 | 41% |
| | Libertarian | V. Luther Etzel | 294 | 0.12% |
| Total votes | Total votes | Total votes | 243,014 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1986

1986 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Thomas R. Carper (incumbent) | 106,351 | 66% |
| | Republican | Thomas Nueberger | 53,767 | 33% |
| | American | Patrick Harrison | 639 | 0.40% |
| Total votes | Total votes | Total votes | 160,757 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1988

1988 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Thomas R. Carper (incumbent) | 158,338 | 68% |
| | Republican | James P. Krapf | 76,179 | 32% |
| Total votes | Total votes | Total votes | 234,517 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1990

1990 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Thomas R. Carper (incumbent) | 116,274 | 66% |
| | Republican | Ralph Williams | 58,037 | 33% |
| | Libertarian | Richard Cohen | 3,121 | 1% |
| | N/A | Write-ins | 3 | <0.01% |
| Total votes | Total votes | Total votes | 177,435 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1992

1992 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Castle | 153,037 | 55% |
| | Democratic | S. B. Woo | 117,426 | 43% |
| | Libertarian | Peggy Schmitt | 5,661 | 2% |
| Total votes | Total votes | Total votes | 276,124 | 100% |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 1994

1994 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Castle (incumbent) | 137,945 | 71% |
| | Democratic | Carol Ann DeSantis | 51,793 | 27% |
| | Libertarian | Danny Ray Beaver | 3,866 | 2% |
| | Independent Party | Donald M. Hockmuth | 1,404 | 0.72% |
| Total votes | Total votes | Total votes | 195,008 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1996

1996 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Castle (incumbent) | 185,577 | 70% |
| | Democratic | Dennis E. Williams | 73,258 | 27% |
| | Libertarian | George A. Jurgensen | 4,000 | 2% |
| | Constitution | Felicia B. Johnson | 3,009 | 1% |
| | Natural Law | Bob Mattson | 987 | 0.37% |
| Total votes | Total votes | Total votes | 266,831 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1998

1998 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Castle (incumbent) | 119,811 | 66% |
| | Democratic | Dennis E. Williams | 57,446 | 32% |
| | Constitution | James P. Webster | 2,411 | 1% |
| | Natural Law | Kim Stanley Bemis | 859 | 1% |
| | N/A | Write-ins | 2 | <0.01% |
| Total votes | Total votes | Total votes | 180,529 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2000

2000 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Castle (incumbent) | 211,797 | 68% |
| | Democratic | Micheal C. Miller | 96,488 | 31% |
| | Constitution | James P. Webster | 2,490 | 0.5% |
| | Libertarian | Brad C. Thomas | 2,351 | 0.5% |
| Total votes | Total votes | Total votes | 313,126 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2002

2002 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Castle (incumbent) | 164,605 | 72% |
| | Democratic | Micheal C. Miller | 61,011 | 27% |
| | Libertarian | Brad C. Thomas | 2,789 | 1% |
| Total votes | Total votes | Total votes | 228,405 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2004

2004 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Castle (incumbent) | 245,978 | 69% |
| | Democratic | Paul Donnelly | 105,716 | 30% |
| | Independent Party | Maurice J. Barros (write-in) | 2,337 | 0.5% |
| | Libertarian | William E. Morris | 2,014 | 0.5% |
| Total votes | Total votes | Total votes | 356,045 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2006

2006 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Castle (incumbent) | 143,897 | 57% |
| | Democratic | Dennis Spivack | 97,565 | 39% |
| | Independent Party | Karen M. Hartley-Nagle | 5,769 | 2% |
| | Green | Michael Berg | 4,463 | 2% |
| Total votes | Total votes | Total votes | 251,694 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2008

2008 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Castle (incumbent) | 235,437 | 61% |
| | Democratic | Karen Hartley-Nagle | 146,434 | 38% |
| | Libertarian | Mark Parks | 3,586 | 1% |
| Total votes | Total votes | Total votes | 385,457 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2010

2010 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | John Carney | 173,543 | 57% |
| | Republican | Glen Urquhart | 125,442 | 41% |
| | Independent Party | Earl R. Lofland | 3,704 | 1% |
| | Libertarian | Brent Wangen | 1,986 | 1% |
| | Independent | Jeffrey Brown | 961 | 0.31% |
| Total votes | Total votes | Total votes | 305,636 | 100% |
| Turnout | Turnout | Turnout | | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 2012

2012 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | John Carney (incumbent) | 249,905 | 64% |
| | Republican | Tom Kovach | 129,749 | 33% |
| | Green | Bernard August | 4,273 | 2% |
| | Libertarian | Scott Gesty | 4,096 | 1% |
| Total votes | Total votes | Total votes | 388,023 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2014

2014 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | John Carney (incumbent) | 137,251 | 59% |
| | Republican | Rose Izzo | 85,146 | 37% |
| | Green | Bernard August | 4,801 | 2% |
| | Libertarian | Scott Gesty | 4,419 | 2% |
| Total votes | Total votes | Total votes | 231,617 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2016

2016 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lisa Blunt Rochester | 233,554 | 56% |
| | Republican | Hans Reigle | 172,301 | 41% |
| | Green | Mark Andrew Perri | 8,326 | 2% |
| | Libertarian | Scott Gesty | 6,436 | 2% |
| Total votes | Total votes | Total votes | 420,617 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2018

2018 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lisa Blunt Rochester (incumbent) | 227,353 | 64.5% |
| | Republican | Scott Walker | 125,384 | 35.5% |
| Turnout | Turnout | Turnout | 352,737 | 46.1% |
| Total votes | Total votes | Total votes | 352,737 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2020

2020 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lisa Blunt Rochester (incumbent) | 281,382 | 57.63% |
| | Republican | Lee Murphy | 196,392 | 40.22% |
| | Independent Party | Catherine S. Purcell | 6,682 | 1.37% |
| | Libertarian | David L. Rogers | 3,814 | 0.78% |
| Total votes | Total votes | Total votes | 488,270 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2022

2022 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lisa Blunt Rochester (incumbent) | 178,416 | 55.4% |
| | Republican | Lee Murphy | 138,201 | 42.9% |
| | Libertarian | Cody McNutt | 3,074 | 0.9% |
| | Non-Partisan Delaware | David Rogers | 1,958 | 0.6% |
| Total votes | Total votes | Total votes | 321,568 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2024

2024 Delaware's at-large congressional district election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Sarah McBride | 287,830 | 57.9 |
| | Republican | John Whalen | 209,606 | 42.1 |
| | Write-in | Write-in | 0 | 0.0 |
| Total votes | Total votes | Total votes | 497,436 | 100.0 |