List of United States senators from Colorado

Colorado was admitted to the Union on August 1, 1876, and elects senators to Senate Class 2 and Class 3. Its current senators are Democrat Michael Bennet and Republican Cory Gardner.

List of Senators

Class 2 Class 2 U.S. Senators belong to the electoral cycle that was first elected just to finish the 46th United States Congress in the first elections of 1876, and were elected also in 1876 to the term beginning in 1877, and then the seat was contested again every three Congresses (six years) thereafter. The seat in recent years have been contested in 2002, 2008, and 2014. The next election will be in 2020.						C	Class 3 Class 3 U.S. Senators belong to the electoral cycle that was first elected to finish the 46th United States Congress and for the next Congress in the first elections of 1876, and then the seat was contested again every three Congresses (six years) thereafter. The seat in recent years have been contested in 1998, 2004, and 2010. The next election will be in 2016.
#	Senator	Party	Dates in office	Electoral history	T		T	Electoral history	Dates in office	Party	Senator	#
1	Henry M. Teller	Republican	November 15, 1876 – April 17, 1882	Elected to finish the term in 1876.	1	44th	1	Elected in 1876. Retired.	November 15, 1876 – March 3, 1879	Republican	Jerome B. Chaffee	1
				Elected to next term in 1876. 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	Elected in 1882. [data missing]	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 1888.	4	51st
						52nd	4	Re-elected in 1891.		Silver Republican
						53rd
				Re-elected in 1894. Lost re-election.	5	54th
						55th	5	Re-elected in 1897.		Democratic
						56th
6	Thomas M. Patterson	Democratic	March 4, 1901 – March 3, 1907	Elected in 1900. Retired.	6	57th
						58th	6	Re-elected in 1903. Retired.
						59th
7	Simon Guggenheim	Republican	March 4, 1907 – March 3, 1913	Elected in 1906. Retired.	7	60th
						61st	7	Elected in 1908. 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 in 1912. 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 re-election.	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 to finish Adams's term.	December 20, 1941 – January 3, 1957	Republican	Eugene Millikin	13
				Re-elected in 1942.	13	78th
						79th	13	Elected to full term in 1944
						80th
				Re-elected in 1948. Retired.	14	81st
						82nd	14	Re-elected in 1950. Retired.
						83rd
12	Gordon L. 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 K. 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.	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 full term in 2010.
						113th
18	Cory Gardner	Republican	January 3, 2015 – Present	Elected in 2014.	25	114th
						115th	25	To be determined in the 2016 election.
						116th
To be determined in the 2020 election.					26	117th
#	Senator	Party	Years in office	Electoral history	T	C	T	Electoral history	Years in office	Party	Senator	#
Class 2							Class 3

Living former Senators

As of April 2015, there are eight former U.S. Senators from Colorado who are currently living at this time, four from Class 2 and four from Class 3.

Senator	Term of office	Class	Date of birth (and age)
Gary Hart	1975–1987	3	(1936-11-28) November 28, 1936
William L. Armstrong	1979–1991	2	(1937-03-16) March 16, 1937
Tim Wirth	1987–1993	3	(1939-09-22) September 22, 1939
Hank Brown	1991–1997	2	(1940-02-12) February 12, 1940
Ben N. Campbell	1993–2005	3	(1933-04-13) April 13, 1933
Wayne Allard	1997–2009	2	(1943-12-02) December 2, 1943
Ken Salazar	2005–2009	3	(1955-03-02) March 2, 1955
Mark Udall	2009–2015	2	(1950-07-18) July 18, 1950

See also

• Outline of Colorado
• Index of Colorado-related articles
• State of Colorado
  • Law and government of Colorado
    • Governor of Colorado
      • Lieutenant Governor of Colorado
    • Colorado General Assembly
      • Colorado Senate
      • Colorado House of Representatives
    • Courts of Colorado
      • Colorado Supreme Court
• United States of America
  • United States Congress
    • United States congressional delegations from Colorado
      • List of United States Senators from Colorado
      • List of United States Representatives from Colorado
        • Colorado Congressional Districts