Member/Delegate | Years | Party | District | Notes |
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LeRoy H. Anderson | January 3, 1957 – January 3, 1961 | Democratic | 2nd | Elected in 1956. Re-elected in 1958. Retired to run for U.S. senator. |
Roy E. Ayers | March 4, 1933 – January 3, 1937 | Democratic | 2nd | Elected in 1932. Re-elected in 1934. Retired to run for Governor of Montana. |
James F. Battin | January 3, 1961 – February 27, 1969 | Republican | 2nd | Elected in 1960. Re-elected in 1962. Re-elected in 1964. Re-elected in 1966. Re-elected in 1968. Resigned to become judge of the U.S. District Court of Montana. |
Max Baucus | January 3, 1975 – December 14, 1978 | Democratic | 1st | Elected in 1974. Re-elected in 1976. Retired to run for U.S. senator and resigned when appointed to that seat. |
Albert J. Campbell | March 4, 1899 – March 3, 1901 | Democratic | At-large | Elected in 1898. Retired. |
Thomas Henry Carter | March 4, 1889 – November 8, 1889 | Republican | Territory | Elected in 1888. Position eliminated upon statehood. |
November 8, 1889 – March 3, 1891 | At-large | Elected in 1889. Lost re-election to W.W. Dixon. |
James M. Cavanaugh | March 4, 1867 – March 3, 1871 | Democratic | Territory | Elected in 1866. Re-elected in 1868. Lost renomination to Edwin W. Toole. |
William H. Clagett | March 4, 1871 – March 3, 1873 | Republican | Territory | Elected in 1871. Lost re-election to Maginnis. |
Wesley A. D'Ewart | June 5, 1945 – January 3, 1955 | Republican | 2nd | Elected to finish O'Connor's term. Re-elected in 1946. Re-elected in 1948. Re-elected in 1950. Re-elected in 1952. Retired to run for U.S. senator. |
Steve Daines | January 3, 2013 – January 3, 2015 | Republican | At-large | Elected in 2012. Retired to successfully run for U.S. Senate. |
Joseph M. Dixon | March 4, 1903 – March 3, 1907 | Republican | At-large | Elected in 1902. Re-elected in 1904. Retired to run for U.S. Senate. |
William W. Dixon | March 4, 1891 – March 3, 1893 | Democratic | At-large | Elected in 1890. Lost re-election to Hartman. |
Caldwell Edwards | March 4, 1901 – March 3, 1903 | Populist | At-large | Elected in 1900. Retired. |
John M. Evans | March 4, 1913 – March 3, 1919 | Democratic | At-large | Elected in 1912. Re-elected in 1914. Re-elected in 1916. Redistricted to the 1st district . |
March 4, 1919 – March 3, 1921 | 1st | Redistricted from the at-large district and re-elected in 1918. Lost re-election to McCormick. |
March 4, 1923 – March 3, 1933 | Elected in 1922. Re-elected in 1924. Re-elected in 1926. Re-elected in 1928. Re-elected in 1930. Lost renomination to Monaghan. |
Orvin B. Fjare | January 3, 1955 – January 3, 1957 | Republican | 2nd | Elected in 1954. Lost re-election to Anderson. |
Greg Gianforte | May 25, 2017 – January 3, 2021 | Republican | At-large | Elected to finish Zinke's term. Re-elected in 2018. Retired to successfully run for Governor of Montana. |
Charles S. Hartman | March 4, 1893 – March 3, 1897 | Republican | At-large | Elected in 1892. Re-elected in 1894. |
March 4, 1897 – March 3, 1899 | Silver Republican | Re-elected in 1896 as a Silver Republican. Retired. |
Rick Hill | January 3, 1997 – January 3, 2001 | Republican | At-large | Elected in 1996. Re-elected in 1998. Retired. |
Scott Leavitt | March 4, 1923 – March 3, 1933 | Republican | 2nd | Elected in 1922. Re-elected in 1924. Re-elected in 1926. Re-elected in 1928. Re-elected in 1930. Lost re-election to Ayers. |
Martin Maginnis | March 4, 1873 – March 3, 1885 | Democratic | Territory | Elected in 1872. Re-elected in 1874. Re-elected in 1876. Re-elected in 1878. Re-elected in 1880. Re-elected in 1882. Retired. |
Mike Mansfield | January 3, 1943 – January 3, 1953 | Democratic | 1st | Elected in 1942. Re-elected in 1944. Re-elected in 1946. Re-elected in 1948. Re-elected in 1950. Retired to run for U.S. senator. |
Ron Marlenee | January 3, 1977 – January 3, 1993 | Republican | 2nd | Elected in 1976. Re-elected in 1978. Re-elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Re-elected in 1990. Redistricted to the at-large district and lost re-election to Williams. |
Washington J. McCormick | March 4, 1921 – March 3, 1923 | Republican | 1st | Elected in 1920. Lost re-election to Evans. |
Samuel McLean | January 6, 1865 – March 3, 1867 | Democratic | Territory | Elected in 1864. Re-elected in 1865. Retired. |
John Melcher | June 24, 1969 – January 3, 1977 | Democratic | 2nd | Elected to finish Battin's term. Re-elected in 1970. Re-elected in 1972. Re-elected in 1974. Retired to run for U.S. senator. |
Lee Metcalf | January 3, 1953 – January 3, 1961 | Democratic | 1st | Elected in 1952. Re-elected in 1954. Re-elected in 1956. Re-elected in 1958. Retired to run for U.S. senator. |
Joseph P. Monaghan | March 4, 1933 – January 3, 1937 | Democratic | 1st | Elected in 1932. Re-elected in 1934. Retired to run for U.S. senator. |
Jerry J. O'Connell | January 3, 1937 – January 3, 1939 | Democratic | 1st | Elected in 1936. Lost re-election to Thorkelson. |
James F. O'Connor | January 3, 1937 – January 15, 1945 | Democratic | 2nd | Elected in 1936. Re-elected in 1938. Re-elected in 1940. Re-elected in 1942. Re-elected in 1944. Died. |
Arnold Olsen | January 3, 1961 – January 3, 1971 | Democratic | 1st | Elected in 1960. Re-elected in 1962. Re-elected in 1964. Re-elected in 1966. Re-elected in 1968. Lost re-election to Shoup. |
Charles Nelson Pray | March 4, 1907 – March 3, 1913 | Republican | At-large | Elected in 1906. Re-elected in 1908. Re-elected in 1910. Lost re-election to Evans. |
Jeannette Rankin | March 4, 1917 – March 3, 1919 | Republican | At-large | Elected in 1916. Retired to run for U.S. Senator. |
January 3, 1941 – January 3, 1943 | 1st | Elected in 1940. Retired. |
Dennis Rehberg | January 3, 2001 – January 3, 2013 | Republican | At-large | Elected in 2000. Re-elected in 2002. Re-elected in 2004. Re-elected in 2006. Re-elected in 2008. Re-elected in 2010. Retired to run for U.S. Senator. |
Carl W. Riddick | March 4, 1919 – March 3, 1923 | Republican | 2nd | Elected in 1918. Re-elected in 1920. Retired to run for U.S. senator. |
Matt Rosendale | January 3, 2021 – January 3, 2023 | Republican | At-large | Elected in 2020. Redistricted to the 2nd district . |
January 3, 2023 – present | 2nd | Redistricted from the at-large district and re-elected in 2022. Incumbent. |
Richard G. Shoup | January 3, 1971 – January 3, 1975 | Republican | 1st | Elected in 1970. Re-elected in 1972. Lost re-election to Baucus. |
Tom Stout | March 4, 1913 – March 3, 1917 | Democratic | At-large | Elected in 1912. Re-elected in 1914. Retired. |
Jacob Thorkelson | January 3, 1939 – January 3, 1941 | Republican | 1st | Elected in 1938. Lost renomination to Rankin. |
Joseph Toole | March 4, 1885 – March 3, 1889 | Democratic | Territory | Elected in 1884. Re-elected in 1886. Retired. |
Pat Williams | January 3, 1979 – January 3, 1993 | Democratic | 1st | Elected in 1978. Re-elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Re-elected in 1990. Redistricted to the at-large seat . |
January 3, 1993 – January 3, 1997 | At-large | Redistricted from the 1st district . and Re-elected in 1992. Re-elected in 1994. Retired. |
Ryan Zinke | January 3, 2015 – March 1, 2017 | Republican | At-large | Elected in 2014. Re-elected in 2016. Resigned to become U.S. Secretary of the Interior. |
January 3, 2023 – present | 1st | Elected in 2022. Incumbent. |