| 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  |  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[a]  |  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.  | 
  | Jacksonian  |  March 4, 1825 – March 3, 1827  | 
  | 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.  | 
  | Whig  |  March 4, 1837 – March 3, 1839  | 
  Thomas Robinson Jr. (Georgetown)  |  Democratic  |  March 4, 1839 – March 3, 1841  |  26th  |  Elected in 1838. Lost re-election.  | 
  .jpg)  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  |  May 28, 1863 – December 7, 1863  |  38th  |    | 
  .jpg)  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.  | 
  .jpg)  Charles B. Lore (Wilmington)  |  Democratic  |  March 4, 1883 – March 3, 1887  |  48th 49th  |  Elected in 1882. Re-elected in 1884. Retired.  | 
  .jpg)  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.  | 
  .jpg)  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  |  June 16, 1900 – November 6, 1900  |    | 
  Walter O. Hoffecker (Smyrna)  |  Republican  |  November 6, 1900 – March 3, 1901  |  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.  | 
  .jpg)  William H. Heald (Wilmington)  |  Republican  |  March 4, 1909 – March 3, 1913  |  61st 62nd  |  Elected in 1908. Re-elected in 1910. Retired.  | 
  .jpg)  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.  | 
  .jpg)  Wilbur L. Adams (Wilmington)  |  Democratic  |  March 4, 1933 – January 3, 1935  |  73rd  |  Elected in 1932. Retired to run for U.S. senator.  | 
  .jpg)  J. George Stewart (Wilmington)  |  Republican  |  January 3, 1935 – January 3, 1937  |  74th  |  Elected in 1934. Lost re-election.  | 
  .jpg)  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.  | 
  .jpg)  Philip A. Traynor (Wilmington)  |  Democratic  |  January 3, 1941 – January 3, 1943  |  77th  |  Elected in 1940. Lost re-election.  | 
  .jpg)  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.  | 
  .jpg)  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.  | 
  .jpg)  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  |  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.  |