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United States · Election results history · 2010 Senate · Pennsylvania
Election 2010 Results

Each election opens in its own mode: the forecast before the votes are counted, the live count while races are still too close to call, and the results once every race is decided.

2010 US Senate election in Pennsylvania

Pat Toomey (Republican) beat Joe Sestak (Democrat) in Pennsylvania in 2010, 51.0% to 49.0%, a margin of 2.0 points and 80,229 votes.

The Republican hold continued from 2004, when Arlen Specter won.

Republicans led in 60 of the 67 counties and Democrats in 7. The largest, Philadelphia, cast 425,977 votes and went to the Democrat by 68.1 points. The closest was Greene, where 19 votes separated the two parties.

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Early projection, based on early and incomplete polling: the likely matchups, each weighted by the betting markets' odds of both nominations, not a result. Each county is its 2024 presidential margin moved by its state's projected swing; set a national vote and every state, district and county moves by the same amount from our projection. Colours run in 100 steps from a safe Republican to a safe Democratic margin. Boundaries: US Census Bureau.

Senate

CandidatePartyVotesShare
Pat Toomey won Republican 2,028,945 51.0%
Joe Sestak Democratic 1,948,716 49.0%
Total3,977,661

Every county

CountyDemocratRepublicanOthersTotalMargin
Philadelphia 357,981 84.0% 67,996 16.0% 425,977 D+68.1
Allegheny 232,996 54.8% 192,257 45.2% 425,253 D+9.6
Montgomery 155,413 54.1% 131,955 45.9% 287,368 D+8.2
Bucks 107,208 46.9% 121,331 53.1% 228,539 R+6.2
Delaware 113,844 56.1% 88,955 43.9% 202,799 D+12.3
Chester 80,738 46.6% 92,667 53.4% 173,405 R+6.9
Lancaster 47,649 31.8% 102,113 68.2% 149,762 R+36.4
York 42,039 32.2% 88,394 67.8% 130,433 R+35.5
Westmoreland 48,338 38.9% 76,002 61.1% 124,340 R+22.2
Berks 49,971 44.4% 62,534 55.6% 112,505 R+11.2
Lehigh 45,455 47.4% 50,341 52.6% 95,796 R+5.1
Luzerne 46,566 50.7% 45,313 49.3% 91,879 D+1.4
Dauphin 38,913 44.3% 49,021 55.7% 87,934 R+11.5
Erie 46,851 55.1% 38,146 44.9% 84,997 D+10.2
Northampton 40,321 47.7% 44,209 52.3% 84,530 R+4.6
Cumberland 27,829 34.5% 52,890 65.5% 80,719 R+31.0
Washington 31,689 45.5% 37,957 54.5% 69,646 R+9.0
Lackawanna 41,327 59.8% 27,742 40.2% 69,069 D+19.7
Butler 20,471 31.5% 44,429 68.5% 64,900 R+36.9
Beaver 27,339 47.6% 30,136 52.4% 57,475 R+4.9
Cambria 23,028 48.7% 24,254 51.3% 47,282 R+2.6
Schuylkill 18,378 41.1% 26,348 58.9% 44,726 R+17.8
Centre 21,602 48.3% 23,111 51.7% 44,713 R+3.4
Franklin 11,487 26.2% 32,364 73.8% 43,851 R+47.6
Lebanon 11,838 29.8% 27,881 70.2% 39,719 R+40.4
Monroe 18,921 48.2% 20,295 51.8% 39,216 R+3.5
Mercer 16,000 44.3% 20,095 55.7% 36,095 R+11.3
Blair 11,258 31.6% 24,411 68.4% 35,669 R+36.9
Lycoming 10,251 30.0% 23,944 70.0% 34,195 R+40.0
Fayette 16,829 49.8% 16,960 50.2% 33,789 R+0.4
Adams 9,534 30.7% 21,567 69.3% 31,101 R+38.7
Lawrence 12,317 44.3% 15,493 55.7% 27,810 R+11.4
Crawford 9,985 37.4% 16,725 62.6% 26,710 R+25.2
Northumberland 9,817 38.0% 16,032 62.0% 25,849 R+24.0
Somerset 8,488 33.0% 17,209 67.0% 25,697 R+33.9
Indiana 10,085 40.0% 15,133 60.0% 25,218 R+20.0
Clearfield 9,682 39.6% 14,798 60.4% 24,480 R+20.9
Armstrong 7,800 34.7% 14,693 65.3% 22,493 R+30.6
Carbon 8,559 45.3% 10,326 54.7% 18,885 R+9.4
Columbia 6,868 37.8% 11,287 62.2% 18,155 R+24.3
Bradford 5,080 29.6% 12,076 70.4% 17,156 R+40.8
Bedford 4,128 25.1% 12,315 74.9% 16,443 R+49.8
Wayne 5,426 34.4% 10,348 65.6% 15,774 R+31.2
Venango 5,597 35.6% 10,147 64.4% 15,744 R+28.9
Pike 5,627 36.8% 9,678 63.2% 15,305 R+26.5
Perry 3,566 24.5% 10,972 75.5% 14,538 R+50.9
Susquehanna 4,860 34.7% 9,141 65.3% 14,001 R+30.6
Huntingdon 4,223 31.6% 9,134 68.4% 13,357 R+36.8
Jefferson 3,882 29.4% 9,326 70.6% 13,208 R+41.2
Clarion 3,999 32.6% 8,266 67.4% 12,265 R+34.8
Mifflin 2,975 24.5% 9,182 75.5% 12,157 R+51.1
Warren 4,493 37.1% 7,615 62.9% 12,108 R+25.8
Tioga 3,352 27.9% 8,651 72.1% 12,003 R+44.1
Union 4,059 34.8% 7,618 65.2% 11,677 R+30.5
Snyder 3,148 28.1% 8,072 71.9% 11,220 R+43.9
Greene 5,483 49.9% 5,502 50.1% 10,985 R+0.2
Elk 4,591 44.9% 5,638 55.1% 10,229 R+10.2
McKean 3,107 31.4% 6,801 68.6% 9,908 R+37.3
Clinton 3,807 41.3% 5,409 58.7% 9,216 R+17.4
Wyoming 3,283 37.1% 5,569 62.9% 8,852 R+25.8
Juniata 1,829 24.9% 5,504 75.1% 7,333 R+50.1
Montour 2,068 36.3% 3,627 63.7% 5,695 R+27.4
Potter 1,371 25.9% 3,919 74.1% 5,290 R+48.2
Fulton 1,037 23.2% 3,434 76.8% 4,471 R+53.6
Sullivan 754 32.6% 1,561 67.4% 2,315 R+34.9
Forest 750 40.1% 1,121 59.9% 1,871 R+19.8
Cameron 556 35.6% 1,005 64.4% 1,561 R+28.8

Margin: the Democrat's share of all votes minus the Republican's. Sources and how the results were checked.

Pennsylvania Senate elections we hold

YearWinnerMargin
2024 Dave McCormick (R) R+0.2
2022 John K Fetterman (D) D+4.9
2018 Robert P Casey Jr (D) D+12.9
2016 Patrick J. Toomey (R) R+1.4
2012 Robert P. Casey, Jr. (D) D+9.1
2010 Pat Toomey (R) R+2.0
2006 Bob Casey, Jr. (D) D+17.4
2004 Arlen Specter (R) R+10.6
2000 Rick Santorum (R) R+6.9
1998 Arlen Specter (R) R+26.6
1994 Rick Santorum (R) R+2.5
1992 Arlen Specter (R) R+2.8
1988 John Heinz (R) R+34.0
1986 Arlen Specter (R) R+13.6
1982 John Heinz (R) R+20.1
1980 Arlen Specter (R) R+2.4
1976 H. John Heinz III (R) R+5.6
1974 Richard Schweiker (R) R+7.1
1970 Hugh Scott (R) R+6.0
1968 Richard Schweiker (R) R+6.1
1964 Hugh Scott (R) R+1.5
1962 Joseph S. Clark (D) D+2.4
1958 Hugh Scott (R) R+2.8
1956 Joseph S. Clark (D) D+0.4
1952 Edward Martin (R) R+3.6
1950 James H. Duff (R) R+3.6
1946 Edward Martin (R) R+19.4
1944 Francis Myers (D) D+0.6
1940 Joseph F. Guffey (D) D+4.4
1938 James J. Davis (R) R+10.6
1934 Joseph F. Guffey (D) D+4.3
1932 James J. Davis (R) R+6.2
1928 David A. Reed (R) R+30.4
1926 William S. Vare (R) R+11.5
1922 David A. Reed (R) R+25.5
1920 Boies Penrose (R) R+32.8
1916 Philander Knox (R) R+19.1
1914 Boies Penrose (R) R+22.8