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

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. The next election will be in 2016.
#	Senator	Party	Years in office	Electoral history	T e r m		T e r m	Electoral history	Years in office	Party	Senator	#
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
						3rd Congress
2	Albert Gallatin	Anti-Administration	December 2, 1793 – February 28, 1794	Elected in early 1793. Election voided for failure to meet the residency requirements for eligibility to the office.
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				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.
		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.
		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
					30th Congress
					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		March 4, 1855 – January 14, 1856	Vacant
							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
		36th Congress
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.
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. [Data unknown/missing. You can help!]
		Re-elected in early 1893. Legislature failed to re-elect.		19	53rd Congress
					54th Congress
					55th Congress	19	Elected in 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.
		57th Congress
		58th Congress				20	Re-elected in 1903.
20	Philander C. Knox		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
		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
								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
					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 – January 3, 2011	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
					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.
		103rd Congress			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. Lost nomination as a Democrat.
31	Bob Casey, Jr.	Democratic	January 3, 2007 – Present	Elected in 2006.	38				110th Congress
		111th Congress							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	To be determined in the 2016 election.
To be determined in the 2018 election.					40							116th Congress
												117th Congress
#	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 August 2015, there are two former Senators from Pennsylvania who are living, both from Class 1.

See also

• List of United States Senate elections in Pennsylvania
• United States congressional delegations from Pennsylvania
• List of United States Representatives from Pennsylvania

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