List of United States senators from Colorado

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Current delegation

Colorado was admitted to the Union on August 1, 1876 and elects U.S. senators to Senate class 2 and class 3. Its current U.S. senators are Democrats Michael Bennet (serving since 2009) and John Hickenlooper (serving since 2021). Henry M. Teller was Colorado's longest-serving senator (1876–1882; 1885–1909). Colorado is one of fifteen states alongside Arizona, Florida, Georgia, Hawaii, Idaho, Indiana, Louisiana, Maine, Massachusetts, Minnesota, Missouri, Nevada, South Dakota and Utah to have a younger senior senator and an older junior senator.

List of senators[edit]

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.

C

Class 3

Class 3 U.S. senators belong to the electoral cycle that has recently been contested in 2004, 2010, 2016, and 2022. The next election will be in 2028.

# Senator Party Dates in office Electoral history T T Electoral history Dates in office Party Senator #
Vacant Aug 1, 1876 –
Nov 15, 1876
Colorado did not elect its senators until three months after statehood. 1 44th 1 Colorado did not elect its senators until three months after statehood. Aug 1, 1876 –
Nov 15, 1876
Vacant
1
Henry M. Teller
Republican Nov 15, 1876 –
Apr 17, 1882
Elected in 1876. Elected in 1876.
Retired.
Nov 15, 1876 –
Mar 3, 1879
Republican
Jerome B. Chaffee
1
Elected to next term in 1876 or 1877.
Resigned to become U.S. Secretary of the Interior.
2 45th
46th 2 Elected in 1879.
Lost re-nomination.
Mar 4, 1879 –
Mar 3, 1885
Republican
Nathaniel P. Hill
2
47th
2
George M. Chilcott
Republican Apr 17, 1882 –
Jan 27, 1883
Appointed to continue Teller's term.
Did not run to finish the term.
3
Horace Tabor
Republican Jan 27, 1883 –
Mar 3, 1883
Elected to finish Teller's term.
Retired.
4
Thomas M. Bowen
Republican Mar 4, 1883 –
Mar 3, 1889
Election date unknown.
Unknown if retired or lost re-election.
3 48th
49th 3 Elected in 1885. Mar 4, 1885 –
Mar 3, 1909
Republican
Henry M. Teller
3
50th
5
Edward O. Wolcott
Republican Mar 4, 1889 –
Mar 3, 1901
Elected in 1889. 4 51st
52nd 4 Re-elected in 1891.
53rd
Re-elected in 1895.
Lost re-election.
5 54th
55th 5 Re-elected in 1897.[1] Silver Republican
56th
6
Thomas M. Patterson
Democratic Mar 4, 1901 –
Mar 3, 1907
Elected in 1901.
Retired.
6 57th
58th 6 Re-elected in 1903.
Retired.
Democratic
59th
7
Simon Guggenheim
Republican Mar 4, 1907 –
Mar 3, 1913
Elected in 1907.
Retired.
7 60th
61st 7 Elected in 1909.
Died.
Mar 4, 1909 –
Jan 11, 1911
Democratic
Charles J. Hughes Jr.
4
  Jan 11, 1911 –
Jan 15, 1913
Vacant
62nd
Elected to finish Hughes's term. Jan 15, 1913 –
Mar 3, 1921
Democratic
Charles S. Thomas
5
8
John F. Shafroth
Democratic Mar 4, 1913 –
Mar 3, 1919
Elected in 1913.
Lost re-election.
8 63rd
64th 8 Re-elected in 1914.
Lost re-election.
65th
9
Lawrence C. Phipps
Republican Mar 4, 1919 –
Mar 3, 1931
Elected in 1918. 9 66th
67th 9 Elected in 1920.
Died.
Mar 4, 1921 –
Mar 24, 1923
Republican
Samuel D. Nicholson
6
68th
  Mar 24, 1923 –
May 17, 1923
Vacant
Appointed to continue Nicholson's term.
Retired.
May 17, 1923 –
Nov 30, 1924
Democratic
Alva B. Adams
7
Elected to finish Nicholson's term.
Lost renomination.
Dec 1, 1924 –
Mar 3, 1927
Republican
Rice W. Means
8
Re-elected in 1924.
Retired.
10 69th
70th 10 Elected in 1926.
Died.
Mar 4, 1927 –
Aug 27, 1932
Republican
Charles W. Waterman
9
71st
10
Edward P. Costigan
Democratic Mar 4, 1931 –
Jan 3, 1937
Elected in 1930.
Retired.
11 72nd
  Aug 27, 1932 –
Sep 26, 1932
Vacant
Appointed to continue Waterman's term.
Lost election to finish Waterman's term.
Sep 26, 1932 –
Dec 6, 1932
Democratic
Walter Walker
10
Elected to finish Waterman's term.
Lost election to next term.
Dec 7, 1932 –
Mar 3, 1933
Republican
Karl C. Schuyler
11
73rd 11 Elected in 1932. Mar 4, 1933 –
Dec 1, 1941
Democratic
Alva B. Adams
12
74th
11
Edwin C. Johnson
Democratic Jan 3, 1937 –
Jan 3, 1955
Elected in 1936. 12 75th
76th 12 Re-elected in 1938.
Died.
77th
  Dec 1, 1941 –
Dec 20, 1941
Vacant
Appointed to continue Adams's term.
Elected in 1942 to finish Adams's term.[2]
Dec 20, 1941 –
Jan 3, 1957
Republican
Eugene Millikin
13
Re-elected in 1942. 13 78th
79th 13 Re-elected in 1944.
80th
Re-elected in 1948.
Retired.
14 81st
82nd 14 Re-elected in 1950.
Retired.
83rd
12
Gordon Allott
Republican Jan 3, 1955 –
Jan 3, 1973
Elected in 1954. 15 84th
85th 15 Elected in 1956.
Lost re-election.
Jan 3, 1957 –
Jan 3, 1963
Democratic
John A. Carroll
14
86th
Re-elected in 1960. 16 87th
88th 16 Elected in 1962. Jan 3, 1963 –
Jan 3, 1975
Republican
Peter H. Dominick
15
89th
Re-elected in 1966.
Lost re-election.
17 90th
91st 17 Re-elected in 1968.
Lost re-election.
92nd
13
Floyd Haskell
Democratic Jan 3, 1973 –
Jan 3, 1979
Elected in 1972.
Lost re-election.
18 93rd
94th 18 Elected in 1974. Jan 3, 1975 –
Jan 3, 1987
Democratic
Gary Hart
16
95th
14
William L. Armstrong
Republican Jan 3, 1979 –
Jan 3, 1991
Elected in 1978. 19 96th
97th 19 Re-elected in 1980.
Retired.
98th
Re-elected in 1984.
Retired.
20 99th
100th 20 Elected in 1986.
Retired.
Jan 3, 1987 –
Jan 3, 1993
Democratic
Tim Wirth
17
101st
15
Hank Brown
Republican Jan 3, 1991 –
Jan 3, 1997
Elected in 1990.
Retired.
21 102nd
103rd 21 Elected in 1992.
Changed parties on March 3, 1995.
Jan 3, 1993 –
Jan 3, 2005
Democratic
Ben Nighthorse Campbell
18
104th
Republican
16
Wayne Allard
Republican Jan 3, 1997 –
Jan 3, 2009
Elected in 1996. 22 105th
106th 22 Re-elected in 1998.
Retired.
107th
Re-elected in 2002.
Retired.
23 108th
109th 23 Elected in 2004.
Resigned to become U.S. Secretary of the Interior.
Jan 3, 2005 –
Jan 20, 2009
Democratic
Ken Salazar
19
110th
17
Mark Udall
Democratic Jan 3, 2009 –
Jan 3, 2015
Elected in 2008.
Lost re-election.
24 111th
Appointed to finish Salazar's term. Jan 21, 2009 –
present
Democratic
Michael Bennet
20
112th 24 Elected to a full term in 2010.
113th
18
Cory Gardner
Republican Jan 3, 2015 –
Jan 3, 2021
Elected in 2014.
Lost re-election.
25 114th
115th 25 Re-elected in 2016.
116th
19
John Hickenlooper
Democratic Jan 3, 2021 –
present
Elected in 2020. 26 117th
118th 26 Re-elected in 2022.
119th
To be determined in the 2026 election. 27 120th
121st 27 To be determined in the 2028 election.
# Senator Party Years in office Electoral history T C T Electoral history Years in office Party Senator #
Class 2 Class 3

See also[edit]

Notes[edit]

  1. ^ "Teller in Colorado". The New York Times. January 21, 1897. p. 2.
  2. ^ Byrd, p. 86.

References[edit]