List of United States senators from Oklahoma

Oklahoma was admitted to the Union on November 16, 1907. The 2 senators from this state are in 2 different classes. A class gets re-elected every 2 years. For example, Class 3 got re-elected in 2010, Class 1 got re-elected in 2012, and Class 2 got re-elected in 2014. Then the cycle will start over with Class 3 getting re-elected in 2016.

Class 2

#	Senator		Took office	Left office	Party	Previous office	Notes
1	Robert L. Owen	File:Robert Latham Owen.jpg	December 11, 1907	March 3, 1925	Democratic	Member of the Democratic National Committee	Did not seek renomination
2	William B. Pine	File:William Bliss Pine.jpg	March 4, 1925	March 3, 1931	Republican	Oil businessman	Defeated for reelection
3	Thomas Gore	File:Thomas Pryor Gore.jpg	March 4, 1931	January 3, 1937	Democratic	United States Senator from Oklahoma (1907-1931)	Defeated for renomination
4	Joshua B. Lee	File:Joshua B. Lee.jpg	January 3, 1937	January 3, 1943	Democratic	Representative from Oklahoma's 5th congressional district	Defeated for reelection
5	Edward H. Moore	File:Edward Hall Moore.jpg	January 3, 1943	January 3, 1949	Republican	Oil producer, farmer, and cattle raiser	Did not seek renomination
6	Robert S. Kerr	File:Robert S. Kerr.jpg	January 3, 1949	January 1, 1963	Democratic	Governor of Oklahoma	Died in office
7	J. Howard Edmondson	File:JHEdmondson.jpg	January 7, 1963	November 3, 1964	Democratic	Governor of Oklahoma	Appointed to fill vacancy Defeated for renomination
8	Fred R. Harris	File:FredRoyHarris.jpg	November 3, 1964	January 3, 1973	Democratic	Oklahoma State Senator Candidate for Democratic gubernatorial nomination, 1962	Did not seek reelection in 1972 in order to run for President Candidate for Democratic Presidential nomination in 1972 and 1976
9	Dewey F. Bartlett		January 3, 1973	January 3, 1979	Republican	Governor of Oklahoma	Did not seek reelection in 1978
10	David L. Boren	File:Senator David Boren.jpg	January 3, 1979	November 15, 1994	Democratic	Governor of Oklahoma	Did not seek reelection in 1994 Resigned
11	Jim Inhofe	File:Jim Inhofe, 2007 official photo.jpg	November 17, 1994	Incumbent	Republican	Representative from Oklahoma's 1st congressional district	Appointed earlier

Class 3

#	Senator		Took office	Left office	Party	Previous office	Notes
1	Thomas Gore	File:Thomas Pryor Gore.jpg	December 11, 1907	March 3, 1921	Democratic	Congressional Populist candidate in Mississippi Territorial council member	Defeated for renomination
2	John W. Harreld	File:John William Harreld.jpg	March 4, 1921	March 3, 1927	Republican	Representative from Oklahoma's 5th congressional district	Defeated for reelection
3	Elbert Thomas	File:Elbert Thomas.jpg	March 4, 1927	January 3, 1951	Democratic	Representative from Oklahoma's 6th congressional district	Defeated for renomination
4	A. S. Mike Monroney		January 3, 1951	January 3, 1969	Democratic	Representative from Oklahoma's 5th congressional district	Defeated for reelection
5	Henry Bellmon	File:BellmonHL.jpg	January 3, 1969	January 3, 1981	Republican	Governor of Oklahoma	Did not seek reelection in 1980 again Governor of Oklahoma (1987-1991)
6	Don Nickles	File:Don Nickles.jpg	January 5, 1981	January 3, 2005	Republican	Oklahoma State Senator	Did not seek reelection in 2004 Senate Majority Whip (1996-2001, 2001) Senate Minority Whip (2001, 2001-2003)
7	Tom Coburn	File:Tom Coburn official portrait.jpg	January 3, 2005	January 3, 2015	Republican	Representative from Oklahoma's 2nd congressional district	He resigned in 2015 due to poor health.
8	James Lankford	File:James Lankford, Official Portrait, 112th Congress.jpg	January 3, 2015	Incumbent	Republican	Representative from Oklahoma's 5th congressional district