Current delegation

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 (1890–1893; 1895–1929).

List of senators

Class 1

Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2000, 2006, 2012, and 2018. The next election will be in 2024.

C

Class 2

Class 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.

# Senator Party Dates in office Electoral history T T Electoral history Dates in office Party Senator #
Vacant July 10, 1890 –
November 18, 1890
After joining the Union, Wyoming did not elect its senators for four months. 1 51st 1 After joining the Union, Wyoming did not elect its senators for four months. July 10, 1890 –
November 15, 1890
Vacant
1

Francis E. Warren
Republican November 18, 1890 –
March 3, 1893
Elected in 1890.

Lost re-election.
Elected in 1890.

Lost re-election.
November 15, 1890 –
March 3, 1895
Republican

Joseph M. Carey
1
52nd
Vacant March 4, 1893 –
January 23, 1895
  2 53rd
2

Clarence D. Clark
Republican January 23, 1895 –
March 3, 1917
Elected to finish vacant term.
54th 2 Elected in 1895. March 4, 1895 –
November 24, 1929
Republican

Francis E. Warren
2
55th
Re-elected in 1899. 3 56th
57th 3 Re-elected January 22, 1901.
58th
Re-elected January 25, 1905. 4 59th
60th 4 Re-elected January 22, 1907.
61st
Re-elected January 24, 1911.

Lost re-election.
5 62nd
63rd 5 Re-elected January 28, 1913.
64th
3

John B. Kendrick
Democratic March 4, 1917 –
November 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
  November 24, 1929 –
December 5, 1929
Vacant
Appointed to continue Warren's term.

Retired when successor elected.
December 5, 1929 –
November 20, 1930
Republican

Patrick J. Sullivan
3
  November 20, 1930 –
December 1, 1930
Vacant
Elected to finish Warren's term. December 1, 1930 –
January 3, 1937
Republican

Robert D. Carey
4
72nd 8 Elected to full term in 1930.

Lost re-election.
73rd
Vacant November 3, 1933 –
December 18, 1933
 
4

Joseph C. O'Mahoney
Democratic December 18, 1933 –
January 3, 1953
Appointed to continue Kendrick's term.

Elected November 6, 1934 to finish Kendrick's term.
Elected in 1934. 9 74th
75th 9 Elected in 1936.

Lost re-election.
January 3, 1937 –
January 3, 1943
Democratic

Henry H. Schwartz
5
76th
Re-elected in 1940. 10 77th
78th 10 Elected in 1942.

Lost re-election.
January 3, 1943 –
January 3, 1949
Republican

Edward V. Robertson
6
79th
Re-elected in 1946.

Lost re-election.
11 80th
81st 11 Elected in 1948.

Died.
January 3, 1949 –
June 19, 1954
Democratic

Lester C. Hunt
7
82nd
5

Frank A. Barrett
Republican January 3, 1953 –
January 3, 1959
Elected in 1952.

Lost re-election.
12 83rd
  June 19, 1954 –
June 24, 1954
Vacant
Appointed to continue Hunt's term.

Retired when successor elected.
June 24, 1954 –
November 28, 1954
Republican

Edward D. Crippa
8
Elected November 8, 1954 to finish Hunt's term. November 29, 1954 –
January 3, 1961
Democratic

Joseph C. O'Mahoney
9
84th 12 Elected to full term in 1954.

Retired.
85th
6

Gale W. McGee
Democratic January 3, 1959 –
January 3, 1977
Elected in 1958. 13 86th
87th 13 Edwin Keith Thomson (R) was elected in 1960, but died December 9, 1960, before the Congress began.

Acting as Governor of Wyoming, Hickey appointed himself to begin Thomson's term.

Lost election to finish Thomson's term.
January 3, 1961 –
November 6, 1962
Democratic

John J. Hickey
10
Elected to finish Thomson's term.

Retired.
November 7, 1962 –
January 3, 1967
Republican

Milward L. Simpson
11
88th
Re-elected in 1964. 14 89th
90th 14 Elected in 1966. January 3, 1967 –
December 31, 1978
Republican

Clifford P. Hansen
12
91st
Re-elected in 1970.

Lost re-election.
15 92nd
93rd 15 Re-elected in 1972.

Retired and resigned early to give successor preferential seniority.
94th
7

Malcolm Wallop
Republican January 3, 1977 –
January 3, 1995
Elected in 1976. 16 95th
Appointed to finish Hansen's term, having already been elected to the next term. January 1, 1979 –
January 3, 1997
Republican

Alan K. Simpson
13
96th 16 Elected in 1978.
97th
Re-elected in 1982. 17 98th
99th 17 Re-elected in 1984.
100th
Re-elected in 1988.

Retired.
18 101st
102nd 18 Re-elected in 1990.

Retired.
103rd
8

Craig Thomas
Republican January 3, 1995 –
June 4, 2007
Elected in 1994. 19 104th
105th 19 Elected in 1996. January 3, 1997 –
January 3, 2021
Republican

Mike Enzi
14
106th
Re-elected in 2000. 20 107th
108th 20 Re-elected in 2002.
109th
Re-elected in 2006.

Died.
21 110th
Vacant June 4, 2007 –
June 22, 2007
9

John Barrasso
Republican June 22, 2007 –
Present
Appointed to continue Thomas's term.

Elected November 4, 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. January 3, 2021 –
Present
Republican

Cynthia Lummis
15
118th
To be determined in the 2024 election. 24 119th
120th 24 To be determined in the 2026 election.
# Senator Party Years in office Electoral history T   T Electoral history Years in office Party Senator #
Class 1 Class 2

Living former senators

As of July 2021, there is one living former U.S. senator from Wyoming. The most recent and most recently serving senator to die was Mike Enzi (served 1997–2021) on July 26, 2021.

Senator Term of office Date of birth (and age)
Alan K. Simpson 1979–1997 (1931-09-02) September 2, 1931 (age 89)

Superlatives

Longest service

Senator First served Last served Length of service
Francis E. Warren November 24, 1890 March 3, 1893 Combined total: 37 years, 6 days
(13,519 days)
March 4, 1895 November 24, 1929
Joseph C. O'Mahoney December 18, 1933 January 3, 1953 Combined total: 25 years, 51 days
(9,176 days)
November 29, 1954 January 3, 1961
Mike Enzi January 3, 1997 January 3, 2021 24 years, 0 days
(8,766 days)
Clarence D. Clark January 23, 1895 March 3, 1917 22 years, 39 days
(8,074 days)
Alan Simpson January 1, 1979 January 3, 1997 18 years, 2 days
(6,577 days)

Shortest service

Excludes incumbent Lummis

Senator First served Last served Length of service
Edward D. Crippa June 24, 1954 November 28, 1954 5 months and 4 days
(157 days)
Patrick Joseph Sullivan December 5, 1929 November 30, 1930 11 months, 3 weeks and 4 days
(360 days)
John J. Hickey January 3, 1961 November 6, 1962 1 year, 10 months and 3 days
(672 days)
Milward Simpson November 6, 1962 January 3, 1967 4 years, 1 month and 4 weeks
(1,519 days)
Joseph M. Carey November 15, 1890 March 3, 1895 4 years, 3 months, 2 weeks and 2 days
(1,569 days)

Youngest at beginning of service

Senator Date of birth First served Age
Clarence D. Clark April 16, 1851 January 23, 1895 43 years, 9 months and 7 days
Gale W. McGee March 17, 1915 January 3, 1959 43 years, 9 months and 17 days
Malcolm Wallop February 27, 1933 January 3, 1977 43 years, 10 months and 7 days
Joseph M. Carey January 19, 1845 November 15, 1890 45 years, 9 months and 27 days
Francis E. Warren June 20, 1844 November 24, 1890 46 years, 5 months and 4 days

Oldest at end of service

Senator Date of birth Last served Age
Francis E. Warren June 20, 1844 November 24, 1929 85 years, 5 months and 4 days
Mike Enzi February 1, 1944 January 3, 2021 76 years, 11 months and 2 days
Joseph C. O'Mahoney November 5, 1884 January 3, 1961 76 years, 1 month and 29 days
John B. Kendrick September 6, 1857 November 3, 1933 76 years, 1 month and 28 days
Craig L. Thomas February 17, 1933 June 4, 2007 74 years, 3 months and 18 days

See also

References