List of United States senators from Colorado

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).

Current delegation

List of senatorsEdit

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 1998, 2004, 2010, and 2016. The next election will be in 2022.

# Senator Party Dates in office Electoral history T T Electoral history Dates in office Party Senator #
Vacant August 1, 1876 –
November 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. August 1, 1876 –
November 15, 1876
Vacant
1  
Henry M. Teller
Republican November 15, 1876 –
April 17, 1882
Elected in 1876. Elected in 1876.

Retired.
November 15, 1876 –
March 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.
March 4, 1879 –
March 3, 1885
Republican  
Nathaniel P. Hill
2
47th
2  
George M. Chilcott
Republican April 17, 1882 –
January 27, 1883
Appointed to continue Teller's term.

Did not run to finish the term.
3  
Horace Tabor
Republican January 27, 1883 –
March 3, 1883
Elected to finish Teller's term.

Retired.
4  
Thomas M. Bowen
Republican March 4, 1883 –
March 3, 1889
Election date unknown.

Unknown if retired or lost re-election.
3 48th
49th 3 Elected in 1885. March 4, 1885 –
March 3, 1909
Republican  
Henry M. Teller
3
50th
5  
Edward O. Wolcott
Republican March 4, 1889 –
March 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 January 20, 1897.[1] Silver Republican
56th
6  
Thomas M. Patterson
Democratic March 4, 1901 –
March 3, 1907
Elected in 1901.

Retired.
6 57th
58th 6 Re-elected in 1903.

Retired.
Democratic
59th
7  
Simon Guggenheim
Republican March 4, 1907 –
March 3, 1913
Elected January 16, 1907.

Retired.
7 60th
61st 7 Elected January 19, 1909.

Died.
March 4, 1909 –
January 11, 1911
Democratic  
Charles J. Hughes Jr.
4
  January 11, 1911 –
January 15, 1913
Vacant
62nd
Elected to finish Hughes's term. January 15, 1913 –
March 3, 1921
Democratic  
Charles S. Thomas
5
8  
John F. Shafroth
Democratic March 4, 1913 –
March 3, 1919
Elected January 14, 1913.

Lost re-election.
8 63rd
64th 8 Re-elected in 1914.

Lost re-election.
65th
9  
Lawrence C. Phipps
Republican March 4, 1919 –
March 3, 1931
Elected in 1918. 9 66th
67th 9 Elected in 1920.

Died.
March 4, 1921 –
March 24, 1923
Republican  
Samuel D. Nicholson
6
68th
  March 24, 1923 –
May 17, 1923
Vacant
Appointed to continue Nicholson's term.

Retired.
May 17, 1923 –
November 30, 1924
Democratic  
Alva B. Adams
7
Elected to finish Nicholson's term.

Lost renomination.
December 1, 1924 –
March 3, 1927
Republican  
Rice W. Means
8
Re-elected in 1924.

Retired.
10 69th
70th 10 Elected in 1926.

Died.
March 4, 1927 –
August 27, 1932
Republican  
Charles W. Waterman
9
71st
10  
Edward P. Costigan
Democratic March 4, 1931 –
January 3, 1937
Elected in 1930.

Retired.
11 72nd
  August 27, 1932 –
September 26, 1932
Vacant
Appointed to continue Waterman's term.

Lost election to finish Waterman's term.
September 26, 1932 –
December 6, 1932
Democratic  
Walter Walker
10
Elected to finish Waterman's term.

Lost election to next term.
December 7, 1932 –
March 3, 1933
Republican  
Karl C. Schuyler
11
73rd 11 Elected in 1932. March 4, 1933 –
December 1, 1941
Democratic  
Alva B. Adams
12
74th
11  
Edwin C. Johnson
Democratic January 3, 1937 –
January 3, 1955
Elected in 1936. 12 75th
76th 12 Re-elected in 1938.

Died.
77th
  December 1, 1941 –
December 20, 1941
Vacant
Appointed to continue Adams's term.

Elected November 4, 1942 to finish Adams's term.[2]
December 20, 1941 –
January 3, 1957
Republican  
Eugene Millikin
13
Re-elected in 1942. 13 78th
79th 13 Elected to a full term in 1944.
80th
Re-elected in 1948.

Retired.
14 81st
82nd 14 Re-elected in 1950.

Retired.
83rd
12  
Gordon Allott
Republican January 3, 1955 –
January 3, 1973
Elected in 1954. 15 84th
85th 15 Elected in 1956.

Lost re-election.
January 3, 1957 –
January 3, 1963
Democratic  
John A. Carroll
14
86th
Re-elected in 1960. 16 87th
88th 16 Elected in 1962. January 3, 1963 –
January 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 January 3, 1973 –
January 3, 1979
Elected in 1972.

Lost re-election.
18 93rd
94th 18 Elected in 1974. January 3, 1975 –
January 3, 1987
Democratic  
Gary Hart
16
95th
14  
William L. Armstrong
Republican January 3, 1979 –
January 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.
January 3, 1987 –
January 3, 1993
Democratic  
Tim Wirth
17
101st
15  
Hank Brown
Republican January 3, 1991 –
January 3, 1997
Elected in 1990.

Retired.
21 102nd
103rd 21 Elected in 1992.

Changed parties March 3, 1995.
January 3, 1993 –
January 3, 2005
Democratic  
Ben Nighthorse Campbell
18
104th
Republican
16  
Wayne Allard
Republican January 3, 1997 –
January 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.
January 3, 2005 –
January 20, 2009
Democratic  
Ken Salazar
19
110th
17  
Mark Udall
Democratic January 3, 2009 –
January 3, 2015
Elected in 2008.

Lost re-election.
24 111th
Appointed to finish Salazar's term. January 21, 2009 –
Present
Democratic  
Michael Bennet
20
112th 24 Elected to a full term in 2010.
113th
18  
Cory Gardner
Republican January 3, 2015 –
January 3, 2021
Elected in 2014.

Lost re-election.
25 114th
115th 25 Re-elected in 2016.
116th
19  
John Hickenlooper
Democratic January 3, 2021 –
Present
Elected in 2020. 26 117th
118th 26 To be determined in the 2022 election.
119th
To be determined in the 2026 election. 27 120th
# Senator Party Years in office Electoral history T   T Electoral history Years in office Party Senator #
Class 2 Class 3

Living former senatorsEdit

As of December 2021, there are eight living former U.S. senators from Colorado. The most recent and most recently serving senator to die was William L. Armstrong (served 1979–1991) on July 5, 2016.

Senator Term of office Date of birth (and age)
Gary Hart January 3, 1975 – January 3, 1987 (1936-11-28) November 28, 1936 (age 85)
Tim Wirth January 3, 1987 – January 3, 1993 (1939-09-22) September 22, 1939 (age 82)
Hank Brown January 3, 1991 – January 3, 1997 (1940-02-12) February 12, 1940 (age 81)
Ben N. Campbell January 3, 1993 – January 3, 2005 (1933-04-13) April 13, 1933 (age 88)
Wayne Allard January 3, 1997 – January 3, 2009 (1943-12-02) December 2, 1943 (age 77)
Ken Salazar January 3, 2005 – January 20, 2009 (1955-03-02) March 2, 1955 (age 66)
Mark Udall January 3, 2009 – January 3, 2015 (1950-07-18) July 18, 1950 (age 71)
Cory Gardner January 3, 2015 – January 3, 2021 (1974-08-22) August 22, 1974 (age 47)

SuperlativesEdit

Longest serviceEdit

Senator First served Last served Length of service
Henry M. Teller November 15, 1876 April 17, 1882 Combined total: 29 years, 153 days
(10,738 days)
March 4, 1885 March 3, 1909
Gordon Allott January 3, 1955 January 3, 1973 18 years, 0 days
(6,575 days)
Edwin C. Johnson January 3, 1937 January 3, 1955 18 years, 0 days
(6,574 days)
Eugene Millikin December 20, 1941 January 3, 1957 15 years, 14 days
(5,493 days)
Michael Bennet January 21, 2009 Present 12 years, 314 days
(4,697 days)

Shortest serviceEdit

Excludes incumbent Hickenlooper

Senator First served Last served Length of service
Horace Tabor January 27, 1883 March 3, 1883 1 month and 4 days
(35 days)
Walter Walker September 26, 1932 December 6, 1932 2 months, 1 week and 3 days
(71 days)
Karl C. Schuyler December 7, 1932 March 3, 1933 2 months, 3 weeks and 3 days
(86 days)
George M. Chilcott April 17, 1882 January 27, 1883 9 months, 1 week and 3 days
(285 days)
Charles J. Hughes Jr. March 4, 1909 January 11, 1911 1 year, 10 months and 1 week
(678 days)

Youngest at beginning of serviceEdit

Senator Date of birth First served Age
Gary Hart November 28, 1936 January 3, 1975 38 years, 1 month and 6 days
Simon Guggenheim December 30, 1867 March 4, 1907 39 years, 2 months and 4 days
Cory Gardner August 22, 1974 January 3, 2015 40 years, 4 months and 12 days
Edward O. Wolcott March 26, 1848 March 4, 1889 40 years, 11 months and 6 days
William L. Armstrong March 16, 1937 January 3, 1979 41 years, 9 months and 18 days

Oldest at end of serviceEdit

Senator Date of birth Last served Age
Henry M. Teller May 23, 1830 March 3, 1909 78 years, 9 months and 8 days
Ben Nighthorse Campbell April 13, 1933 January 3, 2005 71 years, 8 months and 21 days
Charles S. Thomas December 6, 1849 March 3, 1921 71 years, 2 months and 25 days
Edwin C. Johnson January 1, 1884 January 3, 1955 71 years and 2 days
Charles W. Waterman November 2, 1861 August 27, 1932 70 years, 9 months and 25 days

See alsoEdit

NotesEdit

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

ReferencesEdit