U.S. Senate elections in Pennsylvania
Elections won
R 31 · D 940 Senate elections since 1914
Last decided by
0.2 pts2024, Dave McCormick over Robert P. Casey Jr.
Closest ever
0.22 pts2024, Dave McCormick over Robert P. Casey Jr.
Longest streak
14 in a rowRepublican, 1964–2004
Next election
2028Tuesday, November 7, 2028
Pennsylvania's U.S. Senate seats are held by Democrat John K Fetterman and Republican Dave McCormick; McCormick won the most recent race by 0.22 points in 2024. Fetterman has held one seat since 2022 and McCormick the other since 2024. The 2024 race put McCormick ahead of Robert P. Casey Jr., 0.22 points clear. Across 40 elections since 1914, Republicans have won 31 and Democrats 9. Of those, the closest was 2024, decided by 0.22 points; the widest 1930, by 45.9 points.
Dave McCormick R 3,399,295 · Robert P. Casey Jr. D 3,384,180 · John C Thomas L 89,653 · Leila Hazou G 66,388 · +1 more
John K Fetterman D 2,751,012 · Mehmet C Oz R 2,487,260 · Erik Gerhardt L 72,887 · Richard L Weiss G 30,434 · +1 more
Robert P. Casey Jr. D 2,777,680 · Louis J. Barletta R 2,134,848 · Dale R Kerns Jr. L 50,907 · Neal Taylor Gale G 31,208
Patrick J. Toomey R 2,028,945 · Joe Sestak D 1,948,716
Robert P. Casey Jr. D 2,392,984 · Rick Santorum R 1,684,778
Arlen Specter R 2,925,080 · Joseph M. Hoeffel D 2,334,126 · James N. Clymer C 220,056 · Betsy Summer L 79,263
Rick Santorum R 2,481,962 · Ron Klink D 2,154,908 · John J. Featherman L 45,775 · Lester B. Searer C 28,382 · +1 more
Arlen Specter R 1,814,180 · Bill Lloyd D 1,028,839 · Dean Snyder C 68,377 · Jack Iannantuono L 46,103
Rick Santorum R 1,735,691 · Harris Wofford D 1,648,481 · Diane Blough P 69,825 · Donald C. Ernsberger L 59,115
H. John Heinz III R 2,901,715 · Joe Vignola D 1,416,764 · Darcy Richardson C 25,273 · Henry Haller III L 11,822 · +2 more
H. John Heinz III R 2,136,418 · Cyril H. Wecht D 1,412,965 · Barbara I. Karkutt L 19,244 · Kipp Miriam Dawson S 18,951 · +1 more
Arlen Specter R 2,230,404 · Pete Flaherty D 2,122,391 · Linda Mohrbacher S 27,229 · David K. Walter L 18,595 · +2 more
H. John Heinz III R 2,381,891 · William J. Green D 2,126,977 · Andrew J. Watson C 26,028 · Frederick W. Stanton S 5,484 · +2 more
Hugh Scott R 1,874,106 · William G. Sesler D 1,653,774 · Frank W. Gaydosh C 85,813 · W. Henry McFarland I 18,275 · +3 more
Richard S. Schweiker R 2,399,762 · Joseph S. Clark D 2,117,662 · Frank W. Gaydosh C 96,742 · Benson Perry S 7,198 · +1 more
Hugh Scott R 2,429,858 · Genevieve Blatt D 2,359,223 · Morris Chertov M 7,317 · George S. Taylor S 6,881
Hugh Scott R 2,042,586 · George M. Leader D 1,929,821 · George S. Taylor S 10,431 · Ethel Peterson W 5,742
Joseph S. Clark D 2,268,641 · James H. Duff R 2,250,671 · George S. Taylor S 7,922 · Herbert G. Lewin M 2,640
Edward Martin R 2,331,034 · Guy K. Bard D 2,168,546 · Ira S. Sassaman P 12,150 · William J. Van Essen S 3,538 · +2 more
James H. Duff R 1,820,400 · Francis J. Myers D 1,694,076 · Earl N. Bergerstock P 12,618 · Jack Still G 8,353 · +4 more
Edward Martin R 1,853,458 · Joseph F. Guffey D 1,245,338 · Dale H. Loren P 17,451 · Frank Knotek S 11,613
Francis J. Myers D 1,864,735 · James J. Davis R 1,840,943 · J. Henry Stump S 14,129 · A. Mitchell Palmer P 8,599 · +1 more
Joseph F. Guffey D 2,069,980 · Jay Cooke R 1,893,104 · David H. Felix S 15,449 · H. B. Mansell P 11,113 · +2 more
James J. Davis R 2,086,932 · George H. Earle D 1,694,464 · David H. Felix S 20,155 · Forest S. Van Valin P 9,327 · +2 more
Joseph F. Guffey D 1,494,010 · David A. Reed R 1,366,872 · James H. Maurer S 50,444 · Edwin J. Fithian P 19,985 · +2 more
James J. Davis R 1,375,549 · Lawrence H. Rupp D 1,200,767 · Edwin J. Fithian P 106,597 · William J. Van Essen S 91,556 · +1 more
James J. Davis R 1,462,186 · Sedgwick Kistler D 523,338
David A. Reed R 1,948,646 · William N. McNair D 1,029,055 · William J. Van Essen S 23,100 · Elisha K. Kane P 14,866 · +3 more
William S. Vare R 822,187 · William B. Wilson D 648,680 · Elisha K. Kane P 19,523 · George W. Snyder S 9,869 · +2 more
George Pepper R 819,507 · Frederick B. Kerr D 468,330
David A. Reed R 802,146 · Samuel E. Shull D 434,583 · William J. Burke P 127,180 · Rachel C. Robinson P 41,935 · +2 more
Boies Penrose R 1,068,985 · John A. Farrell D 484,862 · Leah C. Marion P 132,610 · William B. Wilson S 67,316 · +2 more
Philander C. Knox R 680,451 · Ellis L. Orvis D 450,112 · Charles W. Ervin S 45,385 · Herbert T. Ames P 30,089 · +2 more
Boies Penrose R 519,810 · Gifford Pinchot W 269,265 · A. Mitchell Palmer D 266,436 · Frederick W. Whiteside S 37,950 · +2 more