List of United States senators from Oklahoma

Oklahoma was admitted to the Union on November 16, 1907, and elects United States senators to class 2 and class 3. The state's current U.S. senators are Republican James Lankford (serving since 2015) and Republican Alan Armstrong (serving since 2026). Oklahoma's longest-serving senator was Jim Inhofe, who served from 1994 to 2023.

Current delegation

James Lankford (R)

Alan Armstrong (R)

(ordered by seniority)

List of senators

More information C, # ...

#	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 2008, 2014, 2020, and 2022 (special election). 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 2010, 2014 (special election), 2016, and 2022. The next election will be in 2028.
Vacant			Nov 16, 1907 – Dec 11, 1907	Oklahoma did not elect its senators until one month after statehood.	1	60th	1	Oklahoma did not elect its senators until one month after statehood.	Nov 16, 1907 – Dec 11, 1907	Vacant
1	Robert L. Owen (Muskogee)	Democratic	Dec 11, 1907 – Mar 4, 1925	Elected in 1907.		60th	1	Elected in 1907.	Dec 11, 1907 – Mar 4, 1921	Democratic	Thomas Gore (Lawton)	1
						61st	2	Re-elected in 1909.
						62nd
				Re-elected in 1913.	2	63rd
						64th	3	Re-elected in 1914. Lost renomination.
						65th
				Re-elected in 1918. Retired.	3	66th
						67th	4	Elected in 1920. Lost re-election.	Mar 4, 1921 – Mar 4, 1927	Republican	John W. Harreld (Oklahoma City)	2
						68th
2	William B. Pine (Okmulgee)	Republican	Mar 4, 1925 – Mar 4, 1931	Elected in 1924. Lost re-election.	4	69th
						70th	5	Elected in 1926.	Mar 4, 1927 – Jan 3, 1951	Democratic	Elmer Thomas (Medicine Park)	3
						71st
3	Thomas Gore (Oklahoma City)	Democratic	Mar 4, 1931 – Jan 3, 1937	Elected in 1930. Lost renomination.	5	72nd
						73rd	6	Re-elected in 1932.
						74th
4	Joshua B. Lee (Norman)	Democratic	Jan 3, 1937 – Jan 3, 1943	Elected in 1936. Lost re-election.	6	75th
						76th	7	Re-elected in 1938.
						77th
5	Edward H. Moore (Tulsa)	Republican	Jan 3, 1943 – Jan 3, 1949	Elected in 1942. Retired.	7	78th
						79th	8	Re-elected in 1944. Lost renomination.
						80th
6	Robert S. Kerr (Oklahoma City)	Democratic	Jan 3, 1949 – Jan 1, 1963	Elected in 1948.	8	81st
						82nd	9	Elected in 1950.	Jan 3, 1951 – Jan 3, 1969	Democratic	Mike Monroney (Oklahoma City)	4
						83rd
				Re-elected in 1954.	9	84th
						85th	10	Re-elected in 1956.
						86th
				Re-elected in 1960. Died.	10	87th
Vacant			Jan 1, 1963 – Jan 7, 1963			87th
Vacant			Jan 1, 1963 – Jan 7, 1963			88th	11	Re-elected in 1962. Lost re-election.
7	J. Howard Edmondson (Oklahoma City)	Democratic	Jan 7, 1963 – Nov 3, 1964	Appointed to continue Kerr's term Lost nomination to finish Kerr's term.
8	Fred R. Harris (Lawton)	Democratic	Nov 3, 1964 – Jan 3, 1973	Elected to finish Kerr's term.
				Elected to finish Kerr's term.		89th
				Re-elected in 1966. Retired.	11	90th
						91st	12	Elected in 1968.	Jan 3, 1969 – Jan 3, 1981	Republican	Henry Bellmon (Billings)	5
						92nd
9	Dewey F. Bartlett (Tulsa)	Republican	Jan 3, 1973 – Jan 3, 1979	Elected in 1972. Retired.	12	93rd
						94th	13	Re-elected in 1974. Retired.
						95th
10	David Boren (Seminole)	Democratic	Jan 3, 1979 – Nov 15, 1994	Elected in 1978.	13	96th
						97th	14	Elected in 1980.	Jan 3, 1981 – Jan 3, 2005	Republican	Don Nickles (Ponca City)	6
						98th
				Re-elected in 1984.	14	99th
						100th	15	Re-elected in 1986.
						101st
				Re-elected in 1990. Resigned to become President of the University of Oklahoma.	15	102nd
						103rd	16	Re-elected in 1992.
Vacant			Nov 15, 1994 – Nov 17, 1994
11	Jim Inhofe (Tulsa)	Republican	Nov 17, 1994 – Jan 3, 2023	Elected in 1994 to finish Boren's term.
				Elected in 1994 to finish Boren's term.		104th
				Re-elected in 1996.	16	105th
						106th	17	Re-elected in 1998. Retired.
						107th
				Re-elected in 2002.	17	108th
						109th	18	Elected in 2004.	Jan 3, 2005 – Jan 3, 2015	Republican	Tom Coburn (Muskogee)	7
						110th
				Re-elected in 2008.	18	111th
						112th	19	Re-elected in 2010. Resigned.
						113th		Re-elected in 2010. Resigned.
				Re-elected in 2014.	19	114th		Elected in 2014 to finish Coburn's term.	Jan 3, 2015 – present	Republican	James Lankford (Oklahoma City)	8
						115th	20	Re-elected in 2016.
						116th
				Re-elected in 2020. Resigned.	20	117th
12	Markwayne Mullin (Westville)	Republican	Jan 3, 2023 – Mar 23, 2026	Elected in 2022 to finish Inhofe's term. Resigned to become U.S. Secretary of Homeland Security.		118th	21	Re-elected in 2022.
12	Markwayne Mullin (Westville)	Republican	Jan 3, 2023 – Mar 23, 2026			119th
13	Alan Armstrong (Tulsa)	Republican	Mar 24, 2026 – present	Appointed to finish Inhofe's term. Retiring at the end of term and resigning early to give his elected successor preferential seniority.
14	TBD	TBD	TBD	Incoming senator to be appointed to finish Inhofe's term, having already been elected to the next term.
To be determined in the 2026 election.					21	120th
To be determined in the 2026 election.					21	121st	22	To be determined in the 2028 election.
#	Senator	Party	Years in office	Electoral history	T	C	T	Electoral history	Years in office	Party	Senator	#
Class 2						C	Class 3