List of United States Senators from Pennsylvania

This is a chronological listing of the United States Senators from Pennsylvania.

United States Senators are popularly elected, for a six-year term, beginning January 3. Elections are held the first Tuesday after November 1. Before 1914, they were chosen by the Pennsylvania General Assembly, and before 1935, their terms began March 4.

List of Senators

#	Senator	Party	Years in office	Electoral history	T e r m	C o n g r e s s	T e r m	Electoral history	Years in office	Party	Senator	#
Class 1 Class 1 U.S. Senators belong to the electoral cycle that has recently been contested in 1994, 2000, 2006, and 2012. The next election will be in 2018.						C o n g r e s s	Class 3 Class 3 U.S. Senators belong to the electoral cycle that has recently been contested in 1998, 2004, and 2010, and 2016. The next election will be in 2022.
1	William Maclay	Anti-Administration	March 4, 1789 – March 3, 1791	Elected in 1788. Lost re-election.	1	1st Congress	1	Elected in 1788. Retired.	March 4, 1789 – March 3, 1795	Pro- Administration	Robert Morris	1
Vacant			March 4, 1791 – December 1, 1793		2	2nd Congress
2	Albert Gallatin	Anti-Administration	February 28, 1793 – February 28, 1794	Elected in early 1793. Election voided for failure to meet the residency requirements for eligibility to the office.		2nd Congress
2	Albert Gallatin	3rd Congress	February 28, 1793 – February 28, 1794
Vacant			March 1, 1794 – April 23, 1794
3	James Ross		Federalist	April 24, 1794 – March 3, 1803		Elected to finish Gallatin's term
			4th Congress			Elected to finish Gallatin's term	2	Elected in 1795. Retired.	March 4, 1795 – March 3, 1801	Federalist	William Bingham	2
		Re-elected in 1797. Retired.	3		5th Congress
					6th Congress
					7th Congress	3	Elected in 1801. Resigned to become Supervisor of Revenue for Pennsylvania.	March 4, 1801 – June 30, 1801	Democratic- Republican	J. Peter G. Muhlenberg	3
								June 30, 1801 – December 17, 1801	Vacant
							Elected to finish Muhlenberg's term. Retired.	December 17, 1801 – March 3, 1807	Democratic- Republican	George Logan	4
4	Samuel Maclay	Democratic- Republican	March 4, 1803 – January 4, 1809	Elected in 1802. Resigned, believing he would lose re-election.	4				8th Congress
		9th Congress
		10th Congress				4	Elected in 1806. Retired.	March 4, 1807 – March 3, 1813	Democratic- Republican	Andrew Gregg	5
Vacant			January 4, 1809 – January 9, 1809	Vacant
5	Michael Leib		Democratic- Republican	January 9, 1809 – February 14, 1814					Elected to finish Maclay's term, having already won election to the next term.
			Elected in 1808. Resigned to become Postmaster of Philadelphia.		5				11th Congress
		12th Congress
		13th Congress				5	Elected in 1812. Retired.	March 4, 1813 – March 3, 1819	Democratic- Republican	Abner Lacock	6
Vacant			February 14, 1814 – February 24, 1814	Vacant
6	Jonathan Roberts		Democratic- Republican	February 24, 1814 – March 3, 1821					Elected to finish Leib's term
			Re-elected in late 1814. [Data unknown/missing. You can help!]		6				14th Congress
		15th Congress
		16th Congress				6	Elected in 1818. Retired.	March 4, 1819 – March 3, 1825	Democratic- Republican	Walter Lowrie	7
Vacant			March 4, 1821 – December 10, 1821	Legislature failed to elect	7				17th Congress
7	William Findlay	Democratic- Republican	December 10, 1821 – March 3, 1827	Elected late in 1821. Retired.					17th Congress
		Jacksonian Republican							18th Congress			Crawford Republican
		Jacksonian				19th Congress	7	Elected in 1825. Lost re-election.	March 4, 1825 – March 3, 1831	Anti-Jacksonian	William Marks	8
8	Isaac D. Barnard	Jacksonian	March 4, 1827 – December 6, 1831	Elected in 1826. Resigned to due ill health.	8	20th Congress				Adams
		21st Congress				Anti-Jacksonian
		22nd Congress				8	Elected in 1830. Resigned to become U.S. Minister to Russia.	March 4, 1831 – June 30, 1834	Jacksonian	William Wilkins	9
Vacant			December 6, 1831 – December 13, 1831
9	George Mifflin Dallas		Jacksonian	December 13, 1831 – March 3, 1833					Elected to finish Barnard's term. Retired.
Vacant			March 4, 1833 – December 7, 1833	Legislature failed to elect.	9				23rd Congress
10	Samuel McKean		Jacksonian	December 7, 1833 – March 3, 1839								Elected late in 1833. [Data unknown/missing. You can help!]
			June 30, 1834 – December 6, 1834				Vacant
		Elected to finish Wilkins's term. [Data unknown/missing. You can help!]	December 6, 1834 – March 5, 1845				Jacksonian	James Buchanan		10
							24th Congress
		Democratic				25th Congress	9		Re-elected in 1836.		Democratic
Vacant				March 4, 1839 – January 14, 1840	Legislature failed to elect	10					26th Congress
11	Daniel Sturgeon	Democratic		January 14, 1840 – March 3, 1851	Elected late in 1840.						26th Congress
		27th Congress
		28th Congress					10		Re-elected in 1843. Resigned to become U.S. Secretary of State.
		Re-elected in 1845. Retired.			11	29th Congress
								March 5, 1845 – March 13, 1845	Vacant
			Elected in 1845. Retired.					March 13, 1845 – March 3, 1849	Democratic	Simon Cameron	11
			Elected in 1845. Retired.			30th Congress		March 13, 1845 – March 3, 1849		Simon Cameron	11
			31st Congress			11	Elected in 1849. [Data unknown/missing. You can help!]	March 4, 1849 – March 3, 1855	Whig	James Cooper	12
12	Richard Brodhead	Democratic	March 4, 1851 – March 3, 1857	Elected in 1851. [Data unknown/missing. You can help!]	12				32nd Congress
		33rd Congress
		34th Congress				12	Legislature failed to elect in 1856	March 4, 1855 – January 14, 1856	Vacant
		34th Congress					Elected late in 1856. Retired.	January 14, 1856 – March 3, 1861	Democratic	William Bigler		13
13	Simon Cameron	Republican	March 4, 1857 – March 3, 1861	Elected in 1857. Resigned to become U.S. Secretary of War.	13				35th Congress
13	Simon Cameron	36th Congress	March 4, 1857 – March 3, 1861	Elected in 1857. Resigned to become U.S. Secretary of War.
Vacant			March 4, 1861 – March 14, 1861			37th Congress	13	Elected in 1861. Lost re-election.	March 4, 1861 – March 3, 1867	Republican	Edgar Cowan	14
14	David Wilmot	Republican	March 14, 1861 – March 3, 1863	Elected in 1861 to finish Cameron's term. Retired.		37th Congress
15	Charles R. Buckalew	Democratic	March 4, 1863 – March 3, 1869	Elected in 1863. [Data unknown/missing. You can help!]	14	38th Congress
		39th Congress
		40th Congress				14	Elected in 1867.	March 4, 1867 – March 12, 1877	Republican	Simon Cameron	15
16	John Scott	Republican	March 4, 1869 – March 3, 1875	Elected in 1869. Retired.	15				41st Congress
		42nd Congress
		43rd Congress				15	Re-elected in 1873. Resigned.
17	William A. Wallace	Democratic	March 4, 1875 – March 3, 1881	Elected in early 1875. Lost re-election.	16				44th Congress
		45th Congress
								March 12, 1877 – March 20, 1877	Vacant
							Elected in 1877 to finish his father's term	March 20, 1877 – March 3, 1897	Republican	J. Donald Cameron	16
		46th Congress				16	Re-elected in 1879.
18	John I. Mitchell	Republican	March 4, 1881 – March 3, 1887	Elected in early 1881. [Data unknown/missing. You can help!]	17				47th Congress
		48th Congress
		49th Congress				17	Re-elected in 1885.
19	Matthew S. Quay	Republican	March 4, 1887 – March 3, 1899	Elected in early 1887.	18				50th Congress
		51st Congress
		52nd Congress				18	Re-elected in 1891. Retired.
		Re-elected January 17, 1893. Legislature failed to re-elect.		19	53rd Congress
					54th Congress
					55th Congress	19	Elected January 19, 1897.	March 4, 1897 – December 31, 1921	Republican	Boies Penrose	17
	Vacant		March 4, 1899 – January 16, 1901	Quay was appointed to continue the term, but the Senate declared him not entitled to the seat	20				56th Congress
	Matthew S. Quay	Republican	January 16, 1901 – May 28, 1904	Elected late in 1901. Died.					56th Congress
		57th Congress
		58th Congress				20	Re-elected in 1903.
20	Philander C. Knox	58th Congress	Republican	June 10, 1904 – March 3, 1909					Appointed to continue Quay's term. Elected to finish Quay's term.
		Re-elected in early 1905. Resigned to become U.S. Secretary of State.	21		59th Congress
					60th Congress
Vacant				March 4, 1909 – March 17, 1909		61st Congress	21		Re-elected in 1909.
21	George T. Oliver	Republican		March 17, 1909 – March 3, 1917	Elected to finish Knox's term	61st Congress
		Re-elected in early 1911. Retired.	22		62nd Congress
					63rd Congress
					64th Congress	22	Re-elected in 1914.
22	Philander C. Knox	Republican	March 4, 1917 – October 12, 1921	Elected in 1916. Died.	23				65th Congress
		66th Congress
		67th Congress				23	Re-elected in 1920. Died.
Vacant			October 12, 1921 – October 24, 1921
23	William E. Crow		Republican	October 24, 1921 – August 2, 1922					Appointed to continue Knox's term. Died.
							December 31, 1921 – January 9, 1922	Vacant
			Appointed to continue Penrose's term. Elected to finish Penrose's term. Lost renomination.				January 9, 1922 – March 3, 1927	Republican		George Wharton Pepper	18
Vacant				August 2, 1922 – August 8, 1922
24	David A. Reed			Republican				August 8, 1922 – January 3, 1935	Appointed to continue Knox's term. Elected to finish Knox's term.
				Elected in 1922.	24				68th Congress
									69th Congress
		70th Congress	24			Elected in 1926. Senate refused to seat due to allegations of corruption surrounding the election.	March 4, 1927 – December 6, 1929		Republican	William S. Vare	19
		Re-elected in 1928. Lost re-election.		25	71st Congress		March 4, 1927 – December 6, 1929			William S. Vare	19
							December 6, 1929 – December 11, 1929		Vacant
						Appointed to continue Vare's term. Lost nomination to finish Vare's term.	December 11, 1929 – December 1, 1930		Republican	Joseph R. Grundy	20
						Elected to finish Vare's term	December 2, 1930 – January 3, 1945		Republican	James J. Davis	21
					72nd Congress	Elected to finish Vare's term
			73rd Congress		25	Re-elected in 1932.
25	Joseph F. Guffey	Democratic	January 3, 1935 – January 3, 1947	Elected in 1934.				26	74th Congress
		75th Congress
		76th Congress			26	Re-elected in 1938. Lost re-election.
		Re-elected in 1940. Lost re-election.		27				77th Congress
								78th Congress
					79th Congress	27	Elected in 1944. Lost re-election.	January 3, 1945 – January 3, 1951	Democratic	Francis J. Myers	22
26	Edward Martin	Republican	January 3, 1947 – January 3, 1959	Elected in 1946.	28				80th Congress
		81st Congress
		82nd Congress				28	Elected in 1950. Lost re-election.	January 3, 1951 – January 3, 1957	Republican	James H. Duff	23
		Re-elected in 1952. Retired.		29	83rd Congress
					84th Congress
					85th Congress	29	Elected in 1956.	January 3, 1957 – January 3, 1969	Democratic	Joseph S. Clark	24
27	Hugh Scott	Republican	January 3, 1959 – January 3, 1977	Elected in 1958.	30				86th Congress
		87th Congress
		88th Congress				30	Re-elected in 1962. Lost re-election.
		Re-elected in 1964.		31	89th Congress
					90th Congress
					91st Congress	31	Elected in 1968.	January 3, 1969 – January 3, 1981	Republican	Richard S. Schweiker	25
		Re-elected in 1970. Retired.		32	92nd Congress
					93rd Congress
					94th Congress	32	Re-elected in 1974. Did not run for re-election.
28	John Heinz	Republican	January 3, 1977 – April 4, 1991	Elected in 1976.	33				95th Congress
		96th Congress
		97th Congress				33	Elected in 1980.	January 3, 1981 – April 28, 2009	Republican	Arlen Specter	26
		Re-elected in 1982.		34	98th Congress
					99th Congress
					100th Congress	34	Re-elected in 1986.
		Re-elected in 1988. Died.		35	101st Congress
		Re-elected in 1988. Died.			102nd Congress
Vacant			April 4, 1991 – May 9, 1991
29	Harris Wofford	Democratic	May 9, 1991 – January 3, 1995						Appointed to continue Heinz's term. Elected to finish Heinz's term. Lost re-election.
29	Harris Wofford	103rd Congress	May 9, 1991 – January 3, 1995		35	Re-elected in 1992.
30	Rick Santorum	Republican	January 3, 1995 – January 3, 2007	Elected in 1994.			36		104th Congress
		105th Congress
		106th Congress			36	Re-elected in 1998.
		Re-elected in 2000. Lost re-election.		37			107th Congress
							108th Congress
					109th Congress	37	Re-elected in 2004.
31	Bob Casey, Jr.	Democratic	January 3, 2007 – Present	Elected in 2006.	38				110th Congress
		111th Congress
		111th Congress					Changed party. Lost renomination.	April 28, 2009 – January 3, 2011	Democratic
		112th Congress				38	Elected in 2010.	January 3, 2011 – Present	Republican	Pat Toomey	27
		Re-elected in 2012.		39	113th Congress
					114th Congress
					115th Congress	39	Re-elected in 2016.
To be determined in the 2018 election.					40				116th Congress
									117th Congress
						118th Congress	41	To be determined in the 2022 election.
#	Senator	Party	Years in office	Electoral history	T e r m		T e r m	Electoral history	Years in office	Party	Senator	#
Class 1							Class 3

Living former U.S. Senators from Pennsylvania

As of October 2016, there are two former Senators from Pennsylvania who are living, both from Class 1. The most recent senator to die was Richard Schweiker of Class 3 (1969-1981) on July 31, 2015. The most recent Class 1 senator to die was Hugh Scott (1959-1977) on July 21, 1994. The most recently serving Class 3 senator to die was Arlen Specter (1981-2011) on October 14, 2012. The most recently serving Class 1 senator to die was H. John Heinz III (1977-1991), who died in office on April 4, 1991.

Senator	Term of office	Class	Date of birth (and age)
Harris Wofford	1991–1995	1	(1926-04-09) April 9, 1926
Rick Santorum	1995–2007	1	(1958-05-10) May 10, 1958

Lists of United States congressional delegations

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List of United States Senators from Pennsylvania

List of Senators

Living former U.S. Senators from Pennsylvania

See also