List of United States senators from Wyoming

Wyoming was admitted to the Union on July 10, 1890, and elects United States senators to class 1 and class 2. Its current U.S. senators are Republicans John Barrasso (serving since 2007) and Cynthia Lummis (serving since 2021). 21 people have served as a United States senator from Wyoming. Francis E. Warren was Wyoming's longest serving senator (served 1890–1893; 1895–1929).

List of senators

 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | Jul 10, 1890 – Nov 18, 1890
 * After joining the Union, Wyoming did not elect its senators for four months.
 * rowspan=3 | 1
 * rowspan=2
 * rowspan=5 | 1
 * After joining the Union, Wyoming did not elect its senators for four months.
 * nowrap | Jul 10, 1890 – Nov 15, 1890
 * colspan=3 | Vacant

! rowspan=2 | 1 ! rowspan=4 | 1
 * - style="height:2em"
 * rowspan=2 align=left | Francis E. Warren.jpg Francis E. Warren
 * rowspan=2 | Republican
 * rowspan=2 nowrap | Nov 18, 1890 – Mar 3, 1893
 * rowspan=2 | Elected in 1890.Lost re-election.
 * rowspan=4 | Elected in 1890.Lost re-election.
 * rowspan=4 nowrap | Nov 15, 1890 – Mar 3, 1895
 * rowspan=4 | Republican
 * rowspan=4 align=right | Joseph Maull Carey (1845–1924).jpg Joseph M. Carey


 * - style="height:2em"


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | Mar 4, 1893 – Jan 23, 1895
 * rowspan=4 | 2
 * rowspan=4 | 2

! rowspan=12 | 2
 * - style="height:2em"
 * rowspan=12 align=left | Clarence Don Clark.jpg Clarence D. Clark
 * rowspan=12 | Republican
 * rowspan=12 nowrap | Jan 23, 1895 – Mar 3, 1917
 * rowspan=3 | Elected to finish vacant term.

! rowspan=18 | 2
 * - style="height:2em"
 * rowspan=3 | 2
 * rowspan=3 | Elected in 1895.
 * rowspan=18 nowrap | Mar 4, 1895 – Nov 24, 1929
 * rowspan=18 | Republican
 * rowspan=18 align=right | Francis E. Warren.jpg Francis E. Warren
 * rowspan=18 align=right | Francis E. Warren.jpg Francis E. Warren


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1899.
 * rowspan=3 | 3


 * - style="height:2em"
 * rowspan=3 | 3
 * rowspan=3 | Re-elected in 1901.
 * rowspan=3 | Re-elected in 1901.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1905.
 * rowspan=3 | 4


 * - style="height:2em"
 * rowspan=3 | 4
 * rowspan=3 | Re-elected in 1907.
 * rowspan=3 | Re-elected in 1907.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1911.Lost re-election.
 * rowspan=3 | 5


 * - style="height:2em"
 * rowspan=3 | 5
 * rowspan=3 | Re-elected in 1913.
 * rowspan=3 | Re-elected in 1913.


 * - style="height:2em"

! rowspan=13 | 3
 * - style="height:2em"
 * rowspan=13 align=left | JohnBKendrick.jpg John B. Kendrick
 * rowspan=13 | Democratic
 * rowspan=13 nowrap | Mar 4, 1917 – Nov 3, 1933
 * rowspan=3 | Elected in 1916.
 * rowspan=3 | 6


 * - style="height:2em"
 * rowspan=3 | 6
 * rowspan=3 | Re-elected in 1918.
 * rowspan=3 | Re-elected in 1918.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1922.
 * rowspan=3 | 7


 * - style="height:2em"
 * rowspan=7 | 7
 * rowspan=3 | Re-elected in 1924.Died.
 * rowspan=3 | Re-elected in 1924.Died.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=7 | Re-elected in 1928.Died.
 * rowspan=9 | 8


 * - style="height:2em"
 * nowrap | Nov 24, 1929 – Dec 5, 1929
 * colspan=3 | Vacant
 * colspan=3 | Vacant

! 3
 * - style="height:2em"
 * Appointed to continue Warren's term.Retired when successor elected.
 * nowrap | Dec 5, 1929 – Nov 20, 1930
 * | Republican
 * align=right | Patrick Joseph Sullivan.jpg Patrick J. Sullivan


 * - style="height:2em"
 * nowrap | Nov 20, 1930 – Dec 1, 1930
 * colspan=3 | Vacant
 * colspan=3 | Vacant

! rowspan=6 | 4
 * - style="height:2em"
 * Elected to finish Warren's term.
 * rowspan=6 nowrap | Dec 1, 1930 – Jan 3, 1937
 * rowspan=6 | Republican
 * rowspan=6 align=right | Robert Davis Carey.jpg Robert D. Carey


 * - style="height:2em"
 * rowspan=5 | 8
 * rowspan=5 | Elected to full term in 1930.Lost re-election.
 * rowspan=5 | Elected to full term in 1930.Lost re-election.


 * - style="height:2em"


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | Nov 3, 1933 – Dec 18, 1933

! rowspan=10 | 4
 * - style="height:2em"
 * rowspan=10 align=left | JosephCOMahoney.jpg Joseph C. O'Mahoney
 * rowspan=10 | Democratic
 * rowspan=10 nowrap | Dec 18, 1933 – Jan 3, 1953
 * Appointed to continue Kendrick's term.Elected in 1934 to finish Kendrick's term.


 * - style="height:2em"
 * rowspan=3 | Elected in 1934.
 * rowspan=3 | 9

! rowspan=3 | 5
 * - style="height:2em"
 * rowspan=3 | 9
 * rowspan=3 | Elected in 1936.Lost re-election.
 * rowspan=3 nowrap | Jan 3, 1937 – Jan 3, 1943
 * rowspan=3 | Democratic
 * rowspan=3 align=right | HenryHSchwartz.jpg Harry Schwartz
 * rowspan=3 align=right | HenryHSchwartz.jpg Harry Schwartz


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1940.
 * rowspan=3 | 10

! rowspan=3 | 6
 * - style="height:2em"
 * rowspan=3 | 10
 * rowspan=3 | Elected in 1942.Lost re-election.
 * rowspan=3 nowrap | Jan 3, 1943 – Jan 3, 1949
 * rowspan=3 | Republican
 * rowspan=3 align=right | Edward V Robertson.jpg Edward V. Robertson
 * rowspan=3 align=right | Edward V Robertson.jpg Edward V. Robertson


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1946.Lost re-election.
 * rowspan=3 | 11

! rowspan=3 | 7
 * - style="height:2em"
 * rowspan=6 | 11
 * rowspan=3 | Elected in 1948.Died.
 * rowspan=3 nowrap | Jan 3, 1949 – Jun 19, 1954
 * rowspan=3 | Democratic
 * rowspan=3 align=right | Lester Hunt.jpg Lester C. Hunt
 * rowspan=3 align=right | Lester Hunt.jpg Lester C. Hunt


 * - style="height:2em"

! rowspan=6 | 5
 * - style="height:2em"
 * rowspan=6 align=left | Frank Barrett.jpg Frank A. Barrett
 * rowspan=6 | Republican
 * rowspan=6 nowrap | Jan 3, 1953 – Jan 3, 1959
 * rowspan=6 | Elected in 1952.Lost re-election.
 * rowspan=6 | 12


 * - style="height:2em"
 * nowrap | Jun 19, 1954 – Jun 24, 1954
 * colspan=3 | Vacant
 * colspan=3 | Vacant

! 8
 * - style="height:2em"
 * Appointed to continue Hunt's term.Retired when successor elected.
 * nowrap | Jun 24, 1954 – Nov 28, 1954
 * | Republican
 * align=right | Edward David Crippa.jpg Edward D. Crippa

! rowspan=4 | 9
 * - style="height:2em"
 * Elected in 1954 to finish Hunt's term.
 * rowspan=4 nowrap | Nov 29, 1954 – Jan 3, 1961
 * rowspan=4 | Democratic
 * rowspan=4 align=right | JosephCOMahoney.jpg Joseph C. O'Mahoney


 * - style="height:2em"
 * rowspan=3 | 12
 * rowspan=3 | Elected to full term in 1954.Retired.
 * rowspan=3 | Elected to full term in 1954.Retired.


 * - style="height:2em"

! rowspan=10 | 6
 * - style="height:2em"
 * rowspan=10 align=left | M000445.jpg Gale W. McGee
 * rowspan=10 | Democratic
 * rowspan=10 nowrap | Jan 3, 1959 – Jan 3, 1977
 * rowspan=4 | Elected in 1958.
 * rowspan=4 | 13

! 10
 * - style="height:2em"
 * rowspan=4 | 13
 * Appointed to begin the term of Keith Thomson (R), who was elected in 1960 but died before the Congress began.Lost election to finish Thomson's term.
 * nowrap | Jan 3, 1961 – Nov 6, 1962
 * | Democratic
 * align=right | John Joseph Hickey.jpg Joe Hickey
 * align=right | John Joseph Hickey.jpg Joe Hickey

! rowspan=3 | 11
 * - style="height:2em"
 * rowspan=3 | Elected to finish Thomson's term.Retired.
 * rowspan=3 nowrap | Nov 7, 1962 – Jan 3, 1967
 * rowspan=3 | Republican
 * rowspan=3 align=right | Milwardsimpson.jpg Milward Simpson


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1964.
 * rowspan=3 | 14

! rowspan=6 | 12
 * - style="height:2em"
 * rowspan=3 | 14
 * rowspan=3 | Elected in 1966.
 * rowspan=6 nowrap | Jan 3, 1967 – Dec 31, 1978
 * rowspan=6 | Republican
 * rowspan=6 align=right | Clifford Hansen.jpg Clifford Hansen
 * rowspan=6 align=right | Clifford Hansen.jpg Clifford Hansen


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1970.Lost re-election.
 * rowspan=3 | 15


 * - style="height:2em"
 * rowspan=4 | 15
 * rowspan=3 | Re-elected in 1972.Retired and resigned early to give successor preferential seniority.
 * rowspan=3 | Re-elected in 1972.Retired and resigned early to give successor preferential seniority.


 * - style="height:2em"

! rowspan=10 | 7
 * - style="height:2em"
 * rowspan=10 align=left | Malcolmwallop.JPG Malcolm Wallop
 * rowspan=10 | Republican
 * rowspan=10 nowrap | Jan 3, 1977 – Jan 3, 1995
 * rowspan=4 | Elected in 1976.
 * rowspan=4 | 16

! rowspan=10 | 13
 * - style="height:2em"
 * Appointed to finish Hansen's term, having already been elected to the next term.
 * rowspan=10 nowrap | Jan 1, 1979 – Jan 3, 1997
 * rowspan=10 | Republican
 * rowspan=10 align=right | Alan Kooi Simpson.jpg Alan Simpson


 * - style="height:2em"
 * rowspan=3 | 16
 * rowspan=3 | Elected in 1978.
 * rowspan=3 | Elected in 1978.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1982.
 * rowspan=3 | 17


 * - style="height:2em"
 * rowspan=3 | 17
 * rowspan=3 | Re-elected in 1984.
 * rowspan=3 | Re-elected in 1984.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 1988.Retired.
 * rowspan=3 | 18


 * - style="height:2em"
 * rowspan=3 | 18
 * rowspan=3 | Re-elected in 1990.Retired.
 * rowspan=3 | Re-elected in 1990.Retired.


 * - style="height:2em"

! rowspan=7 | 8
 * - style="height:2em"
 * rowspan=7 align=left | Thomascraigportrait.jpg Craig Thomas
 * rowspan=7 | Republican
 * rowspan=7 nowrap | Jan 3, 1995 – Jun 4, 2007
 * rowspan=3 | Elected in 1994.
 * rowspan=3 | 19

! rowspan=14 | 14
 * - style="height:2em"
 * rowspan=3 | 19
 * rowspan=3 | Elected in 1996.
 * rowspan=14 nowrap | Jan 3, 1997 – Jan 3, 2021
 * rowspan=14 | Republican
 * rowspan=14 align=right | Mike Enzi official portrait new.jpg Mike Enzi
 * rowspan=14 align=right | Mike Enzi official portrait new.jpg Mike Enzi


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 2000.
 * rowspan=3 | 20


 * - style="height:2em"
 * rowspan=5 | 20
 * rowspan=5 | Re-elected in 2002.
 * rowspan=5 | Re-elected in 2002.


 * - style="height:2em"


 * - style="height:2em"
 * Re-elected in 2006.Died.
 * rowspan=5 | 21


 * - style="height:2em"
 * colspan=3 | Vacant
 * nowrap | Jun 4, 2007 – Jun 22, 2007

! rowspan=9 | 9
 * - style="height:2em"
 * rowspan=9 align=left | John Barrasso official portrait 112th Congress.jpg John Barrasso
 * rowspan=9 | Republican
 * rowspan=9 nowrap | Jun 22, 2007 – present
 * rowspan=3 | Appointed to continue Thomas's term.Elected in 2008 to finish Thomas's term.


 * - style="height:2em"
 * rowspan=3 | 21
 * rowspan=3 | Re-elected in 2008.
 * rowspan=3 | Re-elected in 2008.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 2012.
 * rowspan=3 | 22


 * - style="height:2em"
 * rowspan=3 | 22
 * rowspan=3 | Re-elected in 2014.Retired.
 * rowspan=3 | Re-elected in 2014.Retired.


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=3 | Re-elected in 2018.
 * rowspan=3 | 23

! rowspan=3 | 15
 * - style="height:2em"
 * rowspan=3 | 23
 * rowspan=3 | Elected in 2020.
 * rowspan=3 nowrap | Jan 3, 2021 – present
 * rowspan=3 | Republican
 * rowspan=3 align=right | Cynthia Lummis U.S. Senator.jpg Cynthia Lummis
 * rowspan=3 align=right | Cynthia Lummis U.S. Senator.jpg Cynthia Lummis


 * - style="height:2em"


 * - style="height:2em"
 * rowspan=2 colspan=5 | To be determined in the 2024 election.
 * rowspan=2|24


 * - style="height:2em"
 * 24
 * colspan=5 | To be determined in the 2026 election.
 * colspan=5 | To be determined in the 2026 election.