List of United States senators from Colorado

Current delegation

Michael Bennet (D)

John Hickenlooper (D)

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).

List of senators[]

#	Senator	Party	Dates in office	Electoral history	T	C	T	Electoral history	Dates in office	Party	Senator	#
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.
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.	1	44th		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		Elected in 1876. Retired.	November 15, 1876 – March 3, 1879	Republican	Jerome B. Chaffee	1
						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
						61st			January 11, 1911 – January 15, 1913	Vacant
						62nd			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		Elected to finish Hughes's term.
						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		Elected in 1920. Died.	March 4, 1921 – March 24, 1923	Republican	Samuel D. Nicholson	6
									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		Elected to finish Nicholson's term. Lost renomination.	December 1, 1924 – March 3, 1927	Republican	Rice W. Means	8
						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		Re-elected in 1938. Died.
									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				Democratic
						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
						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 senators[]

As of August 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 84)
Tim Wirth	January 3, 1987 – January 3, 1993	(1939-09-22) September 22, 1939 (age 81)
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)

Superlatives[]

Longest service[]

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)
Henry M. Teller	March 4, 1885	March 3, 1909	Combined total: 29 years, 153 days (10,738 days)
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, 219 days (4,602 days)

Shortest service[]

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 service[]

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 service[]

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

Notes[]

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

References[]

Byrd, Robert C. (October 1, 1993). Wolff, Wendy (ed.). The Senate, 1789-1989: Historical Statistics, 1789-1992. United States Senate Historical Office (volume 4 Bicentennial ed.). Washington, D.C.: U.S. Government Printing Office. ISBN 9780160632563.

[1] "Teller in Colorado". The New York Times. January 21, 1897. p. 2.

[FOOTNOTEByrd86-2] Byrd, p. 86.

[1]

[2]

show v t United States senators from Colorado
Class 2	Teller Chilcott Tabor Bowen Wolcott Patterson Guggenheim Shafroth Phipps Costigan Johnson Allott Haskell Armstrong Brown Allard Udall Gardner Hickenlooper
Class 3	Chaffee Hill Teller Hughes Thomas Nicholson Adams Means Waterman Walker Schuyler Adams Millikin Carroll Dominick Hart Wirth Campbell Salazar Bennet

show v t Colorado's current delegation to the United States Congress
Senators	Michael Bennet (D) John Hickenlooper (D)
Representatives (ordered by district)	1. Diana DeGette (D) 2. Joe Neguse (D) 3. Lauren Boebert (R) 4. Ken Buck (R) 5. Doug Lamborn (R) 6. Jason Crow (D) 7. Ed Perlmutter (D)

show v t Lists of United States congressional delegations
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Others	American Samoa Cherokee Nation District of Columbia Guam Northern Mariana Islands Puerto Rico U.S. Virgin Islands
Obsolete	Dakota Territory Northwest Territory Orleans Territory Philippines Southwest Territory
Lists of former House members List of former senators

show v t State of Colorado
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show v t Lists of people from Colorado
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