Current delegation

Ron Wyden (D)

Jeff Merkley (D)

Oregon was admitted to the Union on February 14, 1859. Its current U.S. senators are Democrats Ron Wyden (serving since 1996) and Jeff Merkley (serving since 2009). Mark Hatfield was the state's longest serving senator (1967–1997).

Prior to 1906, U.S. senators were elected by the Oregon Legislative Assembly. In 1904, Oregon voters passed a ballot measure that required U.S. senators to be selected by a popular vote and then endorsed by the state legislature. Beginning in 1914, U.S. senators were directly elected by popular vote on the basis of the 17th Amendment to the United States Constitution.^[1][2][3]

List of senators

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 2004, 2010, 2016, and 2022. The next election will be in 2028.
#	Senator	Party	Dates in office	Electoral history	T		T	Electoral history	Dates in office	Party	Senator	#
1	Delazon Smith	Democratic	Feb 14, 1859 – Mar 3, 1859	Elected in 1859. Lost re-election.	1	35th	1	Elected in 1859. Retired.	Feb 14, 1859 – Mar 3, 1861	Democratic	Joseph Lane	1
Vacant			Mar 3, 1859 – Oct 1, 1860	Legislature failed to elect.	2	36th
2	Edward Baker	Republican	Oct 1, 1860 – Oct 21, 1861	Elected late in 1860. Died.
						37th	2	Election year unknown. Lost re-election.	Mar 4, 1861 – Mar 3, 1867	Democratic	James Nesmith	2
Vacant			Oct 21, 1861 – Feb 27, 1862
3	Benjamin Stark	Democratic	Feb 27, 1862 – Sep 12, 1862	Appointed to continue Baker's term. Retired when successor elected.
4	Benjamin F. Harding	Democratic	Sep 12, 1862 – Mar 3, 1865	Elected to finish Baker's term. Retired.
						38th
5	George H. Williams	Republican	Mar 4, 1865 – Mar 3, 1871	Elected in 1864. Lost re-election.	3	39th
						40th	3	Election year unknown. Retired.	Mar 4, 1867 – Mar 3, 1873	Republican	Henry W. Corbett	3
						41st
6	James K. Kelly	Democratic	Mar 4, 1871 – Mar 3, 1877	Elected in 1870. Retired.	4	42nd
						43rd	4	Elected in 1872. Lost re-election.	Mar 4, 1873 – Mar 3, 1879	Republican	John H. Mitchell	4
						44th
7	La Fayette Grover	Democratic	Mar 4, 1877 – Mar 3, 1883	Election year unknown. Retired.	5	45th
						46th	5	Election year unknown. Retired.	Mar 4, 1879 – Mar 3, 1885	Democratic	James H. Slater	5
						47th
8	Joseph N. Dolph	Republican	Mar 4, 1883 – Mar 3, 1895	Elected in 1882.	6	48th
						49th	6		Mar 3, 1885 – Nov 18, 1885	Vacant
								Elected late in 1885.	Nov 18, 1885 – Mar 3, 1897	Republican	John H. Mitchell	6
						50th
				Re-elected in 1888. Lost re-election.	7	51st
						52nd	7	Re-elected in 1890. Lost re-election.
						53rd
9	George W. McBride	Republican	Mar 4, 1895 – Mar 3, 1901	Elected in 1895.[4] Lost renomination.	8	54th
						55th	8		Mar 3, 1897 – Oct 7, 1898	Vacant
								Elected late in 1898. Retired.	Oct 7, 1898 – Mar 3, 1903	Republican	Joseph Simon	7
						56th
10	John H. Mitchell	Republican	Mar 4, 1901 – Dec 8, 1905	Elected in 1901. Died.	9	57th
						58th	9	Elected in 1903.[5] Lost re-election.	Mar 4, 1903 – Mar 3, 1909	Republican	Charles W. Fulton	8
						59th
Vacant			Dec 8, 1905 – Dec 21, 1905
11	John M. Gearin	Democratic	Dec 21, 1905 – Jan 23, 1907	Appointed to continue Mitchell's term. Retired when successor elected.
12	Frederick W. Mulkey	Republican	Jan 23, 1907 – Mar 3, 1907	Elected to finish Mitchell's term.[6][7] Retired.
13	Jonathan Bourne Jr.	Republican	Mar 4, 1907 – Mar 3, 1913	Elected in 1907.[6][7] Lost renomination.	10	60th
						61st	10	Elected in 1909.[7]	Mar 4, 1909 – Mar 3, 1921	Democratic	George E. Chamberlain	9
						62nd
14	Harry Lane	Democratic	Mar 4, 1913 – May 23, 1917	Elected in 1913.[7] Died.	11	63rd
						64th	11	Re-elected in 1914. Lost re-election.
						65th
Vacant			May 23, 1917 – May 29, 1917
15	Charles L. McNary	Republican	May 29, 1917 – Nov 5, 1918	Appointed to continue Lane's term. Not elected to finish Lane's term.
16	Frederick W. Mulkey	Republican	Nov 6, 1918 – Dec 17, 1918	Elected to finish Lane's term. Resigned early to give successor preferential seniority.
17	Charles L. McNary	Republican	Dec 18, 1918 – Feb 25, 1944	Appointed to finish Lane's term, having already been elected to the next term.
				Elected in 1918.	12	66th
						67th	12	Elected in 1920. Lost re-election.	Mar 4, 1921 – Mar 3, 1927	Republican	Robert N. Stanfield	10
						68th
				Re-elected in 1924.	13	69th
						70th	13	Elected in 1926.	Mar 4, 1927 – Jan 31, 1938	Republican	Frederick Steiwer	11
						71st
				Re-elected in 1930.	14	72nd
						73rd	14	Re-elected in 1932. Resigned.
						74th
				Re-elected in 1936.	15	75th
									Jan 31, 1938 – Feb 1, 1938	Vacant
								Appointed to continue Steiwer's term. Retired when successor elected.	Feb 1, 1938 – Nov 8, 1938	Democratic	Alfred Reames	12
								Elected to finish Steiwer's term. Retired.	Nov 9, 1938 – Jan 3, 1939	Republican	Alexander Barry	13
						76th	15	Elected in 1938. Lost renomination.	Jan 3, 1939 – Jan 3, 1945	Republican	Rufus C. Holman	14
						77th
				Re-elected in 1942. Died.	16	78th
Vacant			Feb 25, 1944 – Mar 13, 1944
18	Guy Cordon	Republican	Mar 13, 1944 – Jan 3, 1955	Appointed to continue McNary's term. Elected in 1944 to finish McNary's term.
						79th	16	Elected in 1944.	Jan 3, 1945 – Jan 3, 1969	Republican[8]	Wayne Morse	15
						80th
				Re-elected in 1948. Lost re-election.	17	81st
						82nd	17	Re-elected in 1950.
										Independent[8]
						83rd
19	Richard L. Neuberger	Democratic	Jan 3, 1955 – Mar 9, 1960	Elected in 1954. Died.	18	84th				Democratic[8]
						85th	18	Re-elected in 1956.
						86th
Vacant			Mar 9, 1960 – Mar 23, 1960
20	Hall S. Lusk	Democratic	Mar 23, 1960 – Nov 9, 1960	Appointed to continue Neuberger's term. Retired when successor elected.
21	Maurine Neuberger	Democratic	Nov 9, 1960 – Jan 3, 1967	Elected to finish her husband's term.
				Elected to full term in 1960. Retired.	19	87th
						88th	19	Re-elected in 1962. Lost re-election.
						89th
22	Mark Hatfield	Republican	Jan 3, 1967 – Jan 3, 1997	Elected in 1966. Didn't take seat until Jan 10, 1967, in order to finish his term as Governor of Oregon.	20	90th
						91st	20	Elected in 1968.	Jan 3, 1969 – Oct 1, 1995	Republican	Bob Packwood	16
						92nd
				Re-elected in 1972.	21	93rd
						94th	21	Re-elected in 1974.
						95th
				Re-elected in 1978.	22	96th
						97th	22	Re-elected in 1980.
						98th
				Re-elected in 1984.	23	99th
						100th	23	Re-elected in 1986.
						101st
				Re-elected in 1990. Retired.	24	102nd
						103rd	24	Re-elected in 1992. Resigned.
						104th
									Oct 1, 1995 – Feb 6, 1996	Vacant
								Elected in 1996 to finish Packwood's term.	Feb 6, 1996 – present	Democratic	Ron Wyden	17
23	Gordon Smith	Republican	Jan 3, 1997 – Jan 3, 2009	Elected in 1996.	25	105th
						106th	25	Re-elected in 1998.
						107th
				Re-elected in 2002. Lost re-election.	26	108th
						109th	26	Re-elected in 2004.
						110th
24	Jeff Merkley	Democratic	Jan 3, 2009 – present	Elected in 2008.	27	111th
						112th	27	Re-elected in 2010.
						113th
				Re-elected in 2014.	28	114th
						115th	28	Re-elected in 2016.
						116th
				Re-elected in 2020.	29	117th
						118th	29	Re-elected in 2022.
						119th
To be determined in the 2026 election.					30	120th
						121st	30	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							Class 3