| Class 1Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2008 (special election), 2012, 2018, and 2024. The next election will be in 2030.
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C
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Class 2Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2002, 2008, 2014, and 2020. The next election will be in 2026.
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| #
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Senator
|
Party
|
Dates in office
|
Electoral history
|
T
|
T
|
Electoral history
|
Dates in office
|
Party
|
Senator
|
#
|
| Vacant
|
Jul 10, 1890 –
Nov 18, 1890
|
After joining the Union, Wyoming did not elect its senators for four months.
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1
|
51st
|
1
|
After joining the Union, Wyoming did not elect its senators for four months.
|
Jul 10, 1890 –
Nov 15, 1890
|
Vacant
|
| 1
|
![]()
Francis E. Warren
|
Republican
|
Nov 18, 1890 –
Mar 3, 1893
|
Elected in 1890.Lost re-election.
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Elected in 1890.Lost re-election.
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Nov 15, 1890 –
Mar 3, 1895
|
Republican
|
Joseph M. Carey
|
1
|
| 52nd
|
| Vacant
|
Mar 4, 1893 –
Jan 23, 1895
|
|
2
|
53rd
|
| 2
|
Clarence D. Clark
|
Republican
|
Jan 23, 1895 –
Mar 3, 1917
|
Elected to finish vacant term.
|
| 54th
|
2
|
Elected in 1895.
|
Mar 4, 1895 –
Nov 24, 1929
|
Republican
|
![]()
Francis E. Warren
|
2
|
| 55th
|
| Re-elected in 1899.
|
3
|
56th
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| 57th
|
3
|
Re-elected in 1901.
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| 58th
|
| Re-elected in 1905.
|
4
|
59th
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| 60th
|
4
|
Re-elected in 1907.
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| 61st
|
| Re-elected in 1911.Lost re-election.
|
5
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62nd
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| 63rd
|
5
|
Re-elected in 1913.
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| 64th
|
| 3
|
John B. Kendrick
|
Democratic
|
Mar 4, 1917 –
Nov 3, 1933
|
Elected in 1916.
|
6
|
65th
|
| 66th
|
6
|
Re-elected in 1918.
|
| 67th
|
| Re-elected in 1922.
|
7
|
68th
|
| 69th
|
7
|
Re-elected in 1924.Died.
|
| 70th
|
| Re-elected in 1928.Died.
|
8
|
71st
|
|
|
Nov 24, 1929 –
Dec 5, 1929
|
Vacant
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| Appointed to continue Warren's term.Retired when successor elected.
|
Dec 5, 1929 –
Nov 20, 1930
|
Republican
|
Patrick J. Sullivan
|
3
|
|
|
Nov 20, 1930 –
Dec 1, 1930
|
Vacant
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| Elected to finish Warren's term.
|
Dec 1, 1930 –
Jan 3, 1937
|
Republican
|
Robert D. Carey
|
4
|
| 72nd
|
8
|
Elected to full term in 1930.Lost re-election.
|
| 73rd
|
| Vacant
|
Nov 3, 1933 –
Dec 18, 1933
|
|
| 4
|
Joseph C. O'Mahoney
|
Democratic
|
Dec 18, 1933 –
Jan 3, 1953
|
Appointed to continue Kendrick's term.Elected in 1934 to finish Kendrick's term.
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| Elected in 1934.
|
9
|
74th
|
| 75th
|
9
|
Elected in 1936.Lost re-election.
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Jan 3, 1937 –
Jan 3, 1943
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Democratic
|
Harry Schwartz
|
5
|
| 76th
|
| Re-elected in 1940.
|
10
|
77th
|
| 78th
|
10
|
Elected in 1942.Lost re-election.
|
Jan 3, 1943 –
Jan 3, 1949
|
Republican
|
Edward V. Robertson
|
6
|
| 79th
|
| Re-elected in 1946.Lost re-election.
|
11
|
80th
|
| 81st
|
11
|
Elected in 1948.Died.
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Jan 3, 1949 –
Jun 19, 1954
|
Democratic
|
Lester C. Hunt
|
7
|
| 82nd
|
| 5
|
Frank A. Barrett
|
Republican
|
Jan 3, 1953 –
Jan 3, 1959
|
Elected in 1952.Lost re-election.
|
12
|
83rd
|
|
|
Jun 19, 1954 –
Jun 24, 1954
|
Vacant
|
| Appointed to continue Hunt's term.Retired when successor elected.
|
Jun 24, 1954 –
Nov 28, 1954
|
Republican
|
Edward D. Crippa
|
8
|
| Elected in 1954 to finish Hunt's term.
|
Nov 29, 1954 –
Jan 3, 1961
|
Democratic
|
Joseph C. O'Mahoney
|
9
|
| 84th
|
12
|
Elected to full term in 1954.Retired.
|
| 85th
|
| 6
|
Gale W. McGee
|
Democratic
|
Jan 3, 1959 –
Jan 3, 1977
|
Elected in 1958.
|
13
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86th
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| 87th
|
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.
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Jan 3, 1961 –
Nov 6, 1962
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Democratic
|
Joe Hickey
|
10
|
| Elected to finish Thomson's term.Retired.
|
Nov 7, 1962 –
Jan 3, 1967
|
Republican
|
Milward Simpson
|
11
|
| 88th
|
| Re-elected in 1964.
|
14
|
89th
|
| 90th
|
14
|
Elected in 1966.
|
Jan 3, 1967 –
Dec 31, 1978
|
Republican
|
Clifford Hansen
|
12
|
| 91st
|
| Re-elected in 1970.Lost re-election.
|
15
|
92nd
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| 93rd
|
15
|
Re-elected in 1972.Retired and resigned early to give successor preferential seniority.
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| 94th
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| 7
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Malcolm Wallop
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Republican
|
Jan 3, 1977 –
Jan 3, 1995
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Elected in 1976.
|
16
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95th
|
| Appointed to finish Hansen's term, having already been elected to the next term.
|
Jan 1, 1979 –
Jan 3, 1997
|
Republican
|
Alan Simpson
|
13
|
| 96th
|
16
|
Elected in 1978.
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| 97th
|
| Re-elected in 1982.
|
17
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98th
|
| 99th
|
17
|
Re-elected in 1984.
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| 100th
|
| Re-elected in 1988.Retired.
|
18
|
101st
|
| 102nd
|
18
|
Re-elected in 1990.Retired.
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| 103rd
|
| 8
|
Craig Thomas
|
Republican
|
Jan 3, 1995 –
Jun 4, 2007
|
Elected in 1994.
|
19
|
104th
|
| 105th
|
19
|
Elected in 1996.
|
Jan 3, 1997 –
Jan 3, 2021
|
Republican
|
Mike Enzi
|
14
|
| 106th
|
| Re-elected in 2000.
|
20
|
107th
|
| 108th
|
20
|
Re-elected in 2002.
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| 109th
|
| Re-elected in 2006.Died.
|
21
|
110th
|
| Vacant
|
Jun 4, 2007 –
Jun 22, 2007
|
| 9
|
John Barrasso
|
Republican
|
Jun 22, 2007 –
present
|
Appointed to continue Thomas's term.Elected in 2008 to finish Thomas's term.
|
| 111th
|
21
|
Re-elected in 2008.
|
| 112th
|
| Re-elected in 2012.
|
22
|
113th
|
| 114th
|
22
|
Re-elected in 2014.Retired.
|
| 115th
|
| Re-elected in 2018.
|
23
|
116th
|
| 117th
|
23
|
Elected in 2020.
|
Jan 3, 2021 –
present
|
Republican
|
Cynthia Lummis
|
15
|
| 118th
|
| Re-elected in 2024.
|
24
|
119th
|
| 120th
|
24
|
To be determined in the 2026 election.
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| #
|
Senator
|
Party
|
Years in office
|
Electoral history
|
T
|
C
|
T
|
Electoral history
|
Years in office
|
Party
|
Senator
|
#
|
| Class 1
|
Class 2
|
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