List of United States Senators from Pennsylvania

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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.

Class 1[edit]

Class 1 U.S. Senators belong to the electoral cycle that were elected for one session of the U.S. Congress in the first election of 1788 and whose seats in recent years are contested in 1994, 2000, 2006, and 2012.

# Senator Party Years Congress Term Electoral history
1 WilliamMaclay.jpg William Maclay Anti-Administration March 4, 1789 –
March 3, 1791
1 1 Elected in 1788

Lost re-election
Vacant March 4, 1791 –
December 1, 1793
2 2
3
2 AlbertGallatin.jpeg Albert Gallatin Anti-Administration December 2, 1793 –
February 28, 1794
Elected in early 1793

Election voided on the grounds that he had not met the residency requirements for eligibility to the office.
Vacant March 1, 1794 –
April 23, 1794
3 Rossjamespa.jpg James Ross Federalist April 24, 1794 –
March 3, 1803
3
(Continued)
Elected to finish Gallatin's term
4
5 3 Re-elected in 1797

[Data unknown/missing. You can help!]
6
7
4 Samuel Maclay Democratic-
Republican
March 4, 1803 –
January 4, 1809
8 4 Elected in 1802

Resigned, believing he would lose re-election
9
10
Vacant January 4, 1809 –
January 9, 1809
5 Michael Leib.jpg Michael Leib Democratic-
Republican
January 9, 1809 –
February 14, 1814
10
(Continued)
Elected to finish Maclay's term
11 5 Elected in 1808

Resigned to become Postmaster of Philadelphia
12
13
6 JonathanRoberts.jpg Jonathan Roberts Democratic-
Republican
February 24, 1814 –
March 3, 1821
Elected to finish Leib's term
14 6 Re-elected in late 1814

[Data unknown/missing. You can help!]
15
16
Vacant March 4, 1821 –
December 10, 1821
17 7 Legislature failed to elect
7 WFindley.jpg William Findlay Democratic-
Republican
December 10, 1821 –
March 3, 1827
Elected late in 1821

Retired
Jacksonian
Republican
18
Jacksonian 19
8 Isaac Barnard.jpg Isaac D. Barnard Jacksonian March 4, 1827 –
December 6, 1831
20 8 Elected in 1826

Resigned to due ill health
21
Vacant December 6, 1831 –
December 13, 1831
9 Vice-president of the US George Dallas.jpg George Mifflin Dallas Jacksonian December 13, 1831 –
March 3, 1833
21
(Continued)
Elected to finish Barnard's term

Retired
22
10 SamuelMcKean.jpg Samuel McKean Jacksonian March 4, 1833 –
March 3, 1839
23 9 Elected in 1832

[Data unknown/missing. You can help!]
24
25
Vacant March 4, 1839 –
January 14, 1840
26 10 Legislature failed to elect
11 DSturgeon.jpg Daniel Sturgeon Democratic January 14, 1840 –
March 3, 1851
26
(Continued)
Elected in early 1840
27
28
29 11 Re-elected in early 1845
30
31
12 RichardBrodhead.jpg Richard Brodhead Democratic March 4, 1851 –
March 3, 1857
32 12 Elected in 1851

[Data unknown/missing. You can help!]
33
34
13 Smn Cameron-SecofWar.jpg Simon Cameron Republican March 4, 1857 –
March 4, 1861
35 13 Elected in 1857

Resigned to become U.S. Secretary of War
36
37
Vacant March 4, 1861 –
March 14, 1861
14 David Wilmot.png David Wilmot Republican March 14, 1861 –
March 3, 1863
37
(Continued)
Elected in 1861 to finish Cameron's term

Retired
15 Charles R. Buckalew - Brady-Handy.jpg Charles R. Buckalew Democratic March 4, 1863 –
March 3, 1869
38 14 Elected in 1863

[Data unknown/missing. You can help!]
39
40
16 JohnScottPA.jpg John Scott Republican March 4, 1869 –
March 3, 1875
41 15 Elected in 1869

Retired
42
43
17 William A. Wallace - Brady-Handy.jpg William A. Wallace Democratic March 4, 1875 –
March 3, 1881
44 16 Elected in early 1875

Lost re-election
45
46
18 John I. Mitchell - Brady-Handy.jpg John I. Mitchell Republican March 4, 1881 –
March 3, 1887
47 17 Elected in early 1881

[Data unknown/missing. You can help!]
48
49
19 MatthewQuay.jpg Matthew S. Quay Republican March 4, 1887 –
March 3, 1899
50 18 Elected in early 1887
51
52
53 19 Re-elected in early 1893

Legislature failed to re-elect
54
55
Vacant March 4, 1899 –
January 16, 1901
56 20 Quay was appointed to continue the term, but the Senate declared him not entitled to the seat
20 MatthewQuay.jpg Matthew S. Quay Republican January 16, 1901 –
May 28, 1904
Elected late in 1901

Died
57
58
21 Philander Knox, bw photo portrait, 1904.jpg Philander C. Knox Republican June 10, 1904 –
March 4, 1909
Appointed to continue Quay's term
Elected to finish Quay's term
59 21 Re-elected in early 1905

Resigned to become U.S. Secretary of State
60
61
Vacant March 4, 1909 –
March 17, 1909
22 George Oliver.jpg George T. Oliver Republican March 17, 1909 –
March 3, 1917
61
(Continued)
Elected to finish Knox's term
62 22 Re-elected in early 1911

Retired
63
64
23 Philander Knox, bw photo portrait, 1904.jpg Philander C. Knox Republican March 4, 1917 –
October 12, 1921
65 23 Elected in 1916

Died
66
67
Vacant October 12, 1921 –
October 24, 1921
24 William Evans Crow.jpg William E. Crow Republican October 24, 1921 –
August 2, 1922
Appointed to continue Knox's term

Died
Vacant August 2, 1922 –
August 8, 1922
25 David Aiken Reed.jpg David A. Reed Republican August 8, 1922 –
January 3, 1935
Appointed to continue Knox's term
Elected both to finish Knox's term and to the next term
68 24 Elected in 1922
69
70
71 25 Re-elected in 1928

Lost re-election
72
73
26 Joseph Guffey.jpg Joseph F. Guffey Democratic January 3, 1935 –
January 3, 1947
74 26 Elected in 1934
75
76
77 27 Re-elected in 1940

Lost re-election
78
79
27 EdwardMartinPA.jpg Edward Martin Republican January 3, 1947 –
January 3, 1959
80 28 Elected in 1946
81
82
83 29 Re-elected in 1952

Retired
84
85
28 SenHughScott.jpg Hugh Scott Republican January 3, 1959 –
January 3, 1977
86 30 Elected in 1958
87
88
89 31 Re-elected in 1964
90
91
92 32 Re-elected in 1970

Retired
93
94
29 John Heinz.jpg John Heinz Republican January 3, 1977 –
April 4, 1991
95 33 Elected in 1976
96
97
98 34 Re-elected in 1982
99
100
101 35 Re-elected in 1988

Died
102
Vacant April 4, 1991 –
May 9, 1991
30 Harriswofford.jpg Harris Wofford Democratic May 9, 1991 –
January 3, 1995
102
(Continued)
Appointed to continue Heinz's term
Elected to finish Heinz's term

Lost re-election
103
31 Rick Santorum official photo.jpg Rick Santorum Republican January 3, 1995 –
January 3, 2007
104 36 Elected in 1994
105
106
107 37 Re-elected in 2000

Lost re-election
108
109
32 Bob Casey, official Senate photo portrait, c2008.jpg Bob Casey, Jr. Democratic January 3, 2007 –
Present
110 38 Elected in 2006
111
112
113 39 Re-elected in 2012
114
115
# Senator Party Years Congress Term Electoral history

Class 3[edit]

Class 3 U.S. Senators belong to the electoral cycle that were elected for three sessions of the U.S. Congress in the first election of 1788 and whose seats in recent years are contested in 1998, 2004, and 2010.

# Senator Party Years Congress Term Electoral history
1 Robert morris portrait.jpg Robert Morris Pro-
Administration
March 4, 1789 –
March 3, 1795
1 1 Elected in 1789

[Data unknown/missing. You can help!]
2
3
2 WilliamBingham.jpg William Bingham Federalist March 4, 1795 –
March 3, 1801
4 2 Elected in 1795

[Data unknown/missing. You can help!]
5
6
3 JPMuhlenberg.jpg J. Peter G. Muhlenberg Democratic-
Republican
March 4, 1801 –
June 30, 1801
7 3 Elected in 1801

Resigned to become Supervisor of Revenue for Pennsylvania
Vacant June 30, 1801 –
July 13, 1801
4 GeoLogan.jpg George Logan Democratic-
Republican
July 13, 1801 –
March 3, 1807
7
(Continued)
[Data unknown/missing. You can help!]
8
9
5 AndrewGregg.jpg Andrew Gregg Democratic-
Republican
March 4, 1807 –
March 3, 1813
10 4 Elected in 1807

[Data unknown/missing. You can help!]
11
12
6 AbnerLacock.jpg Abner Lacock Democratic-
Republican
March 4, 1813 –
March 3, 1819
13 5 Elected in 1813

[Data unknown/missing. You can help!]
14
15
7 Lowrie.jpg Walter Lowrie Democratic-
Republican
March 4, 1819 –
March 3, 1825
16 6 Elected in 1819

[Data unknown/missing. You can help!]
17
Crawford
Republican
18
8 WilliamMarks.jpg William Marks Anti-Jacksonian March 4, 1825 –
March 3, 1831
19 7 Elected in 1825

[Data unknown/missing. You can help!]
Adams 20
Anti-Jacksonian 21
9 William Wilkins United States Senator - Brady-Handy.jpg William Wilkins Jacksonian March 4, 1831 –
June 30, 1834
22 8 Elected in 1831

Resigned to become U.S. Minister to Russia
23
Vacant June 30, 1834 –
December 6, 1834
10 James Buchanan.jpg James Buchanan Democratic December 6, 1834 –
March 5, 1845
23
(Continued)
[Data unknown/missing. You can help!]
24
25 9 Re-elected in 1837
26
27
28 10 Re-elected in 1843

Resigned to become U.S. Secretary of State
29
Vacant March 5, 1845 –
March 13, 1845
11 Smn Cameron-SecofWar.jpg Simon Cameron Democratic March 13, 1845 –
March 3, 1849
29
(Continued)
[Data unknown/missing. You can help!]
30
12 JCooper.jpg James Cooper Whig March 4, 1849 –
March 3, 1855
31 11 Elected in 1849

[Data unknown/missing. You can help!]
32
33
Vacant March 4, 1855 –
January 14, 1856
34 12 [Data unknown/missing. You can help!]
13 William Bigler.jpg William Bigler Democratic January 14, 1856 –
March 3, 1861
34
(Continued)
Elected late in 1856

[Data unknown/missing. You can help!]
35
36
14 Edgar Cowan - Brady-Handy.jpg Edgar Cowan Republican March 4, 1861 –
March 3, 1867
37 13 Elected in 1860

Lost re-election
38
39
15 Smn Cameron-SecofWar.jpg Simon Cameron Republican March 4, 1867 –
March 12, 1877
40 14 Elected in 1866
41
42
43 15 Re-elected in 1872

Resigned
44
45
Vacant March 12, 1877 –
March 20, 1877
16 JDonaldC2.jpg J. Donald Cameron Republican March 20, 1877 –
March 3, 1897
45
(Continued)
46 16 Elected to finish his father's term
47
48
49 17 Re-elected in 1884
50
51
52 18 Re-elected in 1890

[Data unknown/missing. You can help!]
53
54
17 Boies Penrose1.jpg Boies Penrose Republican March 4, 1897 –
December 31, 1921
55 19 Elected in 1896
56
57
58 20 Re-elected in 1902
59
60
61 21 Re-elected in 1908
62
63
64 22 Re-elected in 1914
65
66
67 23 Re-elected in 1920

Died
Vacant December 31, 1921 –
January 9, 1922
18 George Wharton Pepper 745bfa7049 o.jpg George Wharton Pepper Republican January 9, 1922 –
March 3, 1927
67
(Continued)
Appointed to continue Penrose's term
Elected to finish Penrose's term

Lost renomination
68
69
19 WilliamVare.jpg William S. Vare Republican March 4, 1927 –
December 6, 1929
70 24 Elected in 1926

Senate refused to seat due to allegations of corruption surrounding the election
71
Vacant December 6, 1929 –
December 11, 1929
20 Joseph R. Grundy cph.3a44489.jpg Joseph R. Grundy Republican December 11, 1929 –
December 1, 1930
Appointed to continue Vare's term

Lost nomination to finish Vare's term
21 Jjdavis.jpg James J. Davis Republican December 2, 1930 –
January 3, 1945
71
(Continued)
Elected to finish Vare's term
72
73 25 Re-elected in 1932
74
75
76 26 Re-elected in 1938

Lost re-election
77
78
22 M001127.jpg Francis J. Myers Democratic January 3, 1945 –
January 3, 1951
79 27 Elected in 1944

Lost re-election
80
81
23 James Henderson Duff.jpg James H. Duff Republican January 3, 1951 –
January 3, 1957
82 28 Elected in 1950

Lost re-election
83
84
24 JosephSClark.jpg Joseph S. Clark Democratic January 3, 1957 –
January 3, 1969
85 29 Elected in 1956
86
87
88 30 Re-elected in 1962

Lost re-election


89
90
25 RichardSchweiker.jpg Richard S. Schweiker Republican January 3, 1969 –
January 3, 1981
91 31 Elected in 1968
92
93
94 32 Re-elected in 1974

Did not run for re-election
95
96


26 Arlen Specter, official Senate photo portrait.jpg Arlen Specter Republican January 3, 1981 –
January 3, 2011
97 33 Elected in 1980
98
99
100 34 Re-elected in 1986
101
102
103 35 Re-elected in 1992
104
105
106 36 Re-elected in 1998
107
108
109 37 Re-elected in 2004

Lost renomination
110
111
Democratic 111
(Continued)
27 Pat Toomey, Official Portrait, 112th Congress.jpg Pat Toomey Republican January 3, 2011 –
Present
112 38 Elected in 2010
113
114
# Senator Party Years Congress Term Electoral history

See also[edit]