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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.

Both of Colorados current U.S. senators are Democrats Michael Bennet (serving since 2009) and John Hickenlooper (serving since 2021). 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.[not verified in body]


Henry M. Teller was Colorado's longest-serving senator (1876–1882; 1885–1909).

List of senators

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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 to run for Governor.
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

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Notes

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

References

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