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 Democrats Mark Udall and Michael Bennet.

Class 2

#	Senator	Party	Years	Term	Electoral history
1	Henry M. Teller	Republican	November 15, 1876 – April 17, 1882	1	Elected in 1876
				2	Re-elected in 1876 Resigned to become U.S. Secretary of the Interior
Vacant			April 17, 1882 – April 17, 1882
2	George M. Chilcott	Republican	April 17, 1882 – January 27, 1883		Appointed to continue Teller's term Retired
3	Horace Tabor	Republican	January 27, 1883 – March 4, 1883		Elected to finish Teller's term Retired
4	Thomas M. Bowen	Republican	March 4, 1883 – March 4, 1889	3	Elected in 1882
5	Edward O. Wolcott	Republican	March 4, 1889 – March 4, 1901	4	Elected in 1888
				5	Re-elected in 1894 Lost re-election
6	Thomas M. Patterson	Democratic	March 4, 1901 – March 4, 1907	6	Elected in 1900 Retired
7	Simon Guggenheim	Republican	March 4, 1907 – March 4, 1913	7	Elected in 1906 Retired
8	John F. Shafroth	Democratic	March 4, 1913 – March 4, 1919	8	Lost re-election
9	Lawrence C. Phipps	Republican	March 4, 1919 – March 4, 1931	9	Elected in 1918
				10	Re-elected in 1924 Retired
10	Edward P. Costigan	Democratic	March 4, 1931 – January 3, 1937	11	Elected in 1930 Retired
11	Edwin C. Johnson	Democratic	January 3, 1937 – January 3, 1955	12	Elected in 1936
				13	Re-elected in 1942
				14	Re-elected in 1948 Retired
12	Gordon L. Allott	Republican	January 3, 1955 – January 3, 1973	15	Elected in 1954
				16	Re-elected in 1960
				17	Re-elected in 1966 Lost re-election
13	Floyd K. Haskell	Democratic	January 3, 1973 – January 3, 1979	18	Elected in 1972 Lost re-election
14	William L. Armstrong	Republican	January 3, 1979 – January 3, 1991	19	Elected in 1978
				20	Re-elected in 1984 Retired
15	Hank Brown	Republican	January 3, 1991 – January 3, 1997	21	Elected in 1990 Retired
16	Wayne Allard	Republican	January 3, 1997 – January 3, 2009	22	Elected in 1996
				23	Re-elected in 2002 Retired
17	Mark Udall	Democratic	January 3, 2009 – Present	24	Elected in 2008
#	Senator	Party	Years	Term	Electoral history

Class 3

#	Senator	Party	Years	Term	Electoral history
1	Jerome B. Chaffee	Republican	November 15, 1876 – March 4, 1879	1	Elected in 1876 Retired
2	Nathaniel P. Hill	Republican	March 4, 1879 – March 4, 1885	2	Elected in 1879 [Data unknown/missing. You can help!]
3	Henry M. Teller	Republican	March 4, 1885 – March 4, 1909	3	Elected in 1926
		Silver Republican		4	Re-elected in 1891
		Democratic		5	Re-elected in 1897
				6	Re-elected in 1897 Retired
4	Charles J. Hughes, Jr.	Democratic	March 4, 1909 – January 11, 1911	7	Died
Vacant			January 11, 1911 – January 15, 1913
5	Charles S. Thomas	Democratic	January 15, 1913 – March 4, 1921		Elected to finish Hughes's term
				8	Re-elected in 1914 Lost re-election
6	Samuel D. Nicholson	Republican	March 4, 1921 – March 24, 1923	9	Elected in 1920 Died
Vacant			March 24, 1923 – May 17, 1923
7	Alva B. Adams	Democratic	May 17, 1923 – November 30, 1924		Appointed to continue Nicholson's term Retired
8	Rice W. Means	Republican	December 1, 1924 – March 4, 1927		Elected to finish Nicholson's term Lost renomination to full term
9	Charles W. Waterman	Republican	March 4, 1927 – August 27, 1932	10	Elected in 1926 Died
Vacant			August 27, 1932 – September 26, 1932
10	Walter Walker	Democratic	September 26, 1932 – December 6, 1932		Appointed to continue Waterman's term Lost special election
11	Karl C. Schuyler	Republican	December 7, 1932 – March 4, 1933		Elected to finish Waterman's term Lost election to full term
12	Alva B. Adams	Democratic	March 4, 1933 – December 1, 1941	11	Elected in 1932
				12	Re-elected in 1938 Died
Vacant			December 1, 1941 – December 20, 1941
13	Eugene Millikin	Republican	December 20, 1941 – January 3, 1957		Appointed to continue Adams's term Elected to finish Adams's term
				13	Elected to full term in 1944
				14	Re-elected in 1950 Retired
14	John A. Carroll	Democratic	January 3, 1957 – January 3, 1963	15	Elected in 1956 Lost re-election
15	Peter H. Dominick	Republican	January 3, 1963 – January 3, 1975	16	Elected in 1962
				17	Re-elected in 1968 Lost re-election
16	Gary Hart	Democratic	January 3, 1975 – January 3, 1987	18	Elected in 1974
				19	Re-elected in 1980 Retired
17	Tim Wirth	Democratic	January 3, 1987 – January 3, 1993	20	Elected in 1986 Retired
18	Ben Nighthorse Campbell	Democratic	January 3, 1993 – January 3, 2005	21	Elected in 1992
		Republican
				22	Re-elected in 1998 Retired
19	Ken Salazar	Democratic	January 3, 2005 – January 20, 2009	23	Elected in 2004 Resigned to become U.S. Secretary of the Interior
20	Michael Bennet	Democratic	January 21, 2009 – Present		Appointed to finish Salazar's term
				24	Elected to full term in 2010
#	Senator	Party	Years	Term	Electoral history

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