List of United States senators from Pennsylvania

Pennsylvania ratified the United States Constitution on December 12, 1787, and elects its U.S. senators to Class 1 and Class 3. Officeholders 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; before 1935, their terms began March 4. The state's current U.S. senators are Democrats Bob Casey Jr. (since 2007) and John Fetterman (since 2023). Arlen Specter was Pennsylvania's longest-serving senator (1981–2011).

Current delegation

List of senatorsEdit

Class 1

Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2000, 2006, 2012, and 2018. The next election will be in 2024.

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  
William Maclay
Anti-
Admin.
Mar 4, 1789 –
Mar 3, 1791
Elected in 1788.
Lost re-election.
1 1st 1 Elected in 1788.
Retired.
Mar 4, 1789 –
Mar 3, 1795
Pro-
Admin.
 
Robert Morris
1
Vacant Mar 4, 1791 –
Dec 1, 1793
Legislature failed to elect. 2 2nd
2  
Albert Gallatin
Anti-
Admin.
Dec 2, 1793 –
Feb 28, 1794
Elected to finish the vacant term.
Election voided.
3rd
Vacant Mar 1, 1794 –
Apr 23, 1794
 
3  
James Ross
Pro-
Admin.
Apr 24, 1794 –
Mar 3, 1803
Elected to finish Gallatin's term.
Federalist 4th 2 Elected in 1795.
Retired.
Mar 4, 1795 –
Mar 3, 1801
Federalist  
William Bingham
2
Re-elected in 1797.
Retired.
3 5th
6th
7th 3 Elected in 1801.
Resigned to become Supervisor of Revenue of Pennsylvania.
Mar 4, 1801 –
Jun 30, 1801
Democratic-
Republican
 
Peter Muhlenberg
3
  Jun 30, 1801 –
Dec 17, 1801
Vacant
Elected to finish Muhlenberg's term.
Retired.
Dec 17, 1801 –
Mar 3, 1807
Democratic-
Republican
 
George Logan
4
4 Samuel Maclay Democratic-
Republican
Mar 4, 1803 –
Jan 4, 1809
Elected in 1802.
Resigned.
4 8th
9th
10th 4 Elected in 1806.
Retired.
Mar 4, 1807 –
Mar 3, 1813
Democratic-
Republican
 
Andrew Gregg
5
Vacant Jan 4, 1809 –
Jan 9, 1809
Vacant
5  
Michael Leib
Democratic-
Republican
Jan 9, 1809 –
Feb 14, 1814
Elected in 1809 to finish Maclay's term, having already been elected to the next term.[1]
Elected in 1808.[2]
Resigned to become Postmaster of Philadelphia.
5 11th
12th
13th 5 Elected in 1812.[3]
Retired.
Mar 4, 1813 –
Mar 3, 1819
Democratic-
Republican
 
Abner Lacock
6
Vacant Feb 14, 1814 –
Feb 24, 1814
6  
Jonathan Roberts
Democratic-
Republican
Feb 24, 1814 –
Mar 3, 1821
Elected to finish Leib's term.
Re-elected in late 1814. 6 14th
15th
16th 6 Elected in 1818.
Retired.
Mar 4, 1819 –
Mar 3, 1825
Democratic-
Republican
 
Walter Lowrie
7
Vacant Mar 4, 1821 –
Dec 10, 1821
Legislature failed to elect. 7 17th
7  
William Findlay
Democratic-
Republican
Dec 10, 1821 –
Mar 3, 1827
Elected late in 1821.
Retired.
18th
Jacksonian 19th 7 Elected in 1825.
Lost re-election.
Mar 4, 1825 –
Mar 3, 1831
National
Republican
 
William Marks
8
8  
Isaac D. Barnard
Jacksonian Mar 4, 1827 –
Dec 6, 1831
Elected in 1826.
Resigned to due ill health.
8 20th
21st
22nd 8 Elected in 1830.
Resigned to become U.S. Minister to Russia.
Mar 4, 1831 –
Jun 30, 1834
Jacksonian  
William Wilkins
9
Vacant Dec 6, 1831 –
Dec 13, 1831
 
9  
George M. Dallas
Jacksonian Dec 13, 1831 –
Mar 3, 1833
Elected to finish Barnard's term.
Retired.
Vacant Mar 4, 1833 –
Dec 7, 1833
Legislature failed to elect. 9 23rd
10  
Samuel McKean
Jacksonian Dec 7, 1833 –
Mar 3, 1839
Elected late in 1833.
  Jun 30, 1834 –
Dec 6, 1834
Vacant
Elected to finish Wilkins's term. Dec 6, 1834 –
Mar 5, 1845
Jacksonian  
James Buchanan
10
24th
Democratic 25th 9 Re-elected in 1836. Democratic
Vacant Mar 4, 1839 –
Jan 14, 1840
Legislature failed to elect. 10 26th
11  
Daniel Sturgeon
Democratic Jan 14, 1840 –
Mar 3, 1851
Elected late in 1840.
27th
28th 10 Re-elected in 1843.
Resigned to become U.S. Secretary of State.
Re-elected in 1845.
Retired.
11 29th
  Mar 5, 1845 –
Mar 13, 1845
Vacant
Elected in 1845.
Retired.
Mar 13, 1845 –
Mar 3, 1849
Democratic  
Simon Cameron
11
30th
31st 11 Elected in 1849. Mar 4, 1849 –
Mar 3, 1855
Whig  
James Cooper
12
12  
Richard Brodhead
Democratic Mar 4, 1851 –
Mar 3, 1857
Elected in 1851. 12 32nd
33rd
34th 12 Legislature failed to elect. Mar 4, 1855 –
Jan 14, 1856
Vacant
Elected late in 1856.
Retired.
Jan 14, 1856 –
Mar 3, 1861
Democratic  
William Bigler
13
13  
Simon Cameron
Republican Mar 4, 1857 –
Mar 4, 1861
Elected in 1857.
Resigned to become U.S. Secretary of War.
13 35th
36th
Vacant Mar 4, 1861 –
Mar 14, 1861
  37th 13 Elected in 1861.
Lost re-election.
Mar 4, 1861 –
Mar 3, 1867
Republican  
Edgar Cowan
14
14  
David Wilmot
Republican Mar 14, 1861 –
Mar 3, 1863
Elected in 1861 to finish Cameron's term.
Retired.
15  
Charles R. Buckalew
Democratic Mar 4, 1863 –
Mar 3, 1869
Elected in 1863. 14 38th
39th
40th 14 Elected in 1867. Mar 4, 1867 –
Mar 12, 1877
Republican  
Simon Cameron
15
16  
John Scott
Republican Mar 4, 1869 –
Mar 3, 1875
Elected in 1869.
Retired.
15 41st
42nd
43rd 15 Re-elected in 1873.
Resigned.
17  
William A. Wallace
Democratic Mar 4, 1875 –
Mar 3, 1881
Elected in 1875.
Lost re-election.
16 44th
45th
  Mar 12, 1877 –
Mar 20, 1877
Vacant
Elected in 1877 to finish his father's term. Mar 20, 1877 –
Mar 3, 1897
Republican  
J. Donald Cameron
16
46th 16 Re-elected in 1879.
18  
John I. Mitchell
Republican Mar 4, 1881 –
Mar 3, 1887
Elected in 1881. 17 47th
48th
49th 17 Re-elected in 1885.
19  
Matthew Quay
Republican Mar 4, 1887 –
Mar 3, 1899
Elected in early 1887. 18 50th
51st
52nd 18 Re-elected in 1891.
Retired.
Re-elected in 1893.
Legislature failed to re-elect.
19 53rd
54th
55th 19 Elected in 1897. Mar 4, 1897 –
Dec 31, 1921
Republican  
Boies Penrose
17
Vacant Mar 4, 1899 –
Jan 16, 1901
Quay was appointed to continue the term, but the Senate rejected his appointment. 20 56th
 
Matthew Quay
Republican Jan 16, 1901 –
May 28, 1904
Elected late in 1901.
Died.
57th
58th 20 Re-elected in 1903.
20  
Philander C. Knox
Republican Jun 10, 1904 –
Mar 3, 1909
Appointed to continue Quay's term.
Elected in 1905 to finish Quay's term.[4]
Re-elected in 1905.[5]
Resigned to become U.S. Secretary of State.
21 59th
60th
Vacant Mar 4, 1909 –
Mar 17, 1909
  61st 21 Re-elected in 1909.
21  
George T. Oliver
Republican Mar 17, 1909 –
Mar 3, 1917
Elected to finish Knox's term
Re-elected in 1911.
Retired.
22 62nd
63rd
64th 22 Re-elected in 1914.
22  
Philander C. Knox
Republican Mar 4, 1917 –
Oct 12, 1921
Elected in 1916.
Died.
23 65th
66th
67th 23 Re-elected in 1920.
Died.
Vacant Oct 12, 1921 –
Oct 24, 1921
 
23  
William E. Crow
Republican Oct 24, 1921 –
Aug 2, 1922
Appointed to continue Knox's term.
Died.
  Dec 31, 1921 –
Jan 9, 1922
Vacant
Appointed to continue Penrose's term.
Elected to finish Penrose's term.
Lost renomination.
Jan 9, 1922 –
Mar 3, 1927
Republican  
George W. Pepper
18
Vacant Aug 2, 1922 –
Aug 8, 1922
 
24  
David A. Reed
Republican Aug 8, 1922 –
Jan 3, 1935
Appointed to continue Knox's term.
Elected to finish Knox's term.
Elected in 1922. 24 68th
69th
70th 24 William Scott Vare (R) was elected in 1926, but the Governor refused to certify the election and the Senate refused to qualify him. Mar 4, 1927 –
Dec 9, 1929
Vacant
Re-elected in 1928.
Lost re-election.
25 71st
Appointed to continue Vare's term.
Lost nomination to finish Vare's term.
Dec 11, 1929 –
Dec 1, 1930
Republican  
Joseph R. Grundy
19
Elected in 1930 to finish Vare's term Dec 2, 1930 –
Jan 3, 1945
Republican  
James J. Davis
20
72nd
73rd 25 Re-elected in 1932.
25  
Joe Guffey
Democratic Jan 3, 1935 –
Jan 3, 1947
Elected in 1934. 26 74th
75th
76th 26 Re-elected in 1938.
Lost re-election.
Re-elected in 1940.
Lost re-election.
27 77th
78th
79th 27 Elected in 1944.
Lost re-election.
Jan 3, 1945 –
Jan 3, 1951
Democratic  
Francis Myers
21
26  
Edward Martin
Republican Jan 3, 1947 –
Jan 3, 1959
Elected in 1946. 28 80th
81st
82nd 28 Elected in 1950.
Lost re-election.
Jan 3, 1951 –
Jan 3, 1957
Republican  
James H. Duff
22
Re-elected in 1952.
Retired.
29 83rd
84th
85th 29 Elected in 1956. Jan 3, 1957 –
Jan 3, 1969
Democratic  
Joseph S. Clark Jr.
23
27  
Hugh Scott
Republican Jan 3, 1959 –
Jan 3, 1977
Elected in 1958. 30 86th
87th
88th 30 Re-elected in 1962.
Lost re-election.
Re-elected in 1964. 31 89th
90th
91st 31 Elected in 1968. Jan 3, 1969 –
Jan 3, 1981
Republican  
Richard Schweiker
24
Re-elected in 1970.
Retired.
32 92nd
93rd
94th 32 Re-elected in 1974.
Retired.
28  
John Heinz
Republican Jan 3, 1977 –
Apr 4, 1991
Elected in 1976. 33 95th
96th
97th 33 Elected in 1980. Jan 3, 1981 –
Jan 3, 2011
Republican  
Arlen Specter
25
Re-elected in 1982. 34 98th
99th
100th 34 Re-elected in 1986.
Re-elected in 1988.
Died.
35 101st
102nd
Vacant Apr 4, 1991 –
May 9, 1991
 
29  
Harris Wofford
Democratic May 9, 1991 –
Jan 3, 1995
Appointed to continue Heinz's term.
Elected to finish Heinz's term.
Lost re-election.
103rd 35 Re-elected in 1992.
30  
Rick Santorum
Republican Jan 3, 1995 –
Jan 3, 2007
Elected in 1994. 36 104th
105th
106th 36 Re-elected in 1998.
Re-elected in 2000.
Lost re-election.
37 107th
108th
109th 37 Re-elected in 2004.
Changed parties Apr 28, 2009.
Lost renomination.
31  
Bob Casey Jr.
Democratic Jan 3, 2007 –
Present
Elected in 2006. 38 110th
111th
Democratic
112th 38 Elected in 2010. Jan 3, 2011 –
Jan 3, 2023
Republican  
Pat Toomey
26
Re-elected in 2012. 39 113th
114th
115th 39 Re-elected in 2016.
Retired.
Re-elected in 2018. 40 116th
117th
118th 40 Elected in 2022. Jan 3, 2023 –
Present
Democratic  
John Fetterman
27
To be determined in the 2024 election. 41 119th
120th
121st 41 To be determined in the 2028 election.
# Senator Party Years in office Electoral history T   T Electoral history Years in office Party Senator #
Class 1 Class 3

NotesEdit

  1. ^ "Pennsylvania 1809 U.S. Senate, Special". Tufts Digital Collations and Archives. A New Nation Votes: American Election Returns 1787–1825. Tufts University. Retrieved February 3, 2018., citing Journal of the Pennsylvania House of Representatives, 1808, pp. 174–176.
  2. ^ "U.S. Senate Election - 13 Dec 1808" (PDF). Wilkes University. Retrieved December 21, 2012.
  3. ^ "Pennsylvania 1812 U.S. Senate". Tufts Digital Collations and Archives. A New Nation Votes: American Election Returns 1787–1825. Tufts University. Retrieved February 23, 2018., citing Journal of the Pennsylvania State Senate, 1812, pp. 41–43.
  4. ^ Byrd, p. 159.
  5. ^ The World Almanac and Encyclopedia 1906. New York: The Press Publishing Co. New York World. 1905. p. 108.

ReferencesEdit

See alsoEdit

External linksEdit