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Allegheny County, PA


Metropolitan Statistical Area: Pittsburgh, PA
Designated Market Area: Pittsburgh, PA-MD-WV
American Communities Project County Type (2023): Urban Suburbs

Places in Allegheny County, PA     [Sort places by name]

 

Tracts in Allegheny County, PA

   



Click here to view demographic data for Allegheny County, PA

2022 population: 1,233,253   ( 9,905 from 2010 , 17,332 from 2020)
Land area: 730.0 square miles
Population density: 1689.5 persons per square mile

2022 Census data
White:952,151 77.21% 3.5%
Black:163,07013.22% 1.9%
Indian:1,4230.12% 0.2%
Asian:55,7464.52% 63.0%
2+ races:29,7692.41% 46.3%
Hispanic:31,0942.52% 63.1%
Total non-White:281,10222.79% 18.5%

2020-2022 ComponentsNumberRate
Births:27,592 11.0
Deaths:34,09813.6
Net Migration: -15,917-6.4
Net Immigration: 4,1181.6
Change in White population:-34,061 -2.8
Change in Non-White pop.:43,966 3.6



Historical Presidential Election Results for Allegheny County, PA

Recent Trends
VotesΔ MarginSwing %
2024 vs. 2020 R -3,022 R +7,179 R + 0.6%
D -10,201
2020 vs. 2016 R +23,433 D +39,709 D + 3.5%
D +63,142
2020 vs. 2012 R +20,874 D +57,198 D + 6.0%
D +78,072
2020 vs. 2008 R +10,566 D +47,040 D + 5.1%
D +57,606
2016 vs. 2008 R -12,867 D +7,331 D + 1.6%
D -5,536
How to interpret this table


Click on the Year to view county-level data for that election.

YearTurnout WinnerRunner-Up OtherTotal Votes Diff
(St) 		Diff
(US) 		PSV
2024 71% Kamala Harris (D) 420,558 59.5% Donald Trump (R) 279,891 39.6% 6,817 [+] 1.0% 707,266 -11 -10 10.06%
2020 72% Joe Biden (D) 430,759 59.4% Donald Trump* (R) 282,913 39.0% 11,128 [+] 1.5% 724,800 -10 -8 10.44%
2016 66% Hillary Clinton (D) 367,617 55.9% Donald Trump (R) 259,480 39.5% 30,092 [+] 4.6% 657,189 -9 -6 10.66%
2012 63% Barack Obama* (D) 352,687 56.5% Mitt Romney (R) 262,039 42.0% 9,101 [+] 1.5% 623,827 -5 -5 10.84%
2008 66% Barack Obama (D) 373,153 57.1% John McCain (R) 272,347 41.6% 8,539 [+] 1.3% 654,039 -3 -4 10.87%
2004 65% John Kerry (D) 368,912 57.2% George W. Bush* (R) 271,925 42.1% 4,632 [+] 0.7% 645,469 -6 -9 11.19%
2000 58% Albert Gore, Jr. (D) 329,963 56.6% George W. Bush (R) 235,361 40.4% 17,154 [+] 2.9% 582,478 -6 -7 11.86%
1996 53% Bill Clinton* (D) 284,480 52.8% Robert Dole (R) 204,067 37.9% 50,068 [+] 9.3% 538,615 -2 -3 11.95%
1992 59% Bill Clinton (D) 324,004 52.8% George Bush* (R) 183,035 29.8% 107,148 [+] 17.4% 614,187 -6 -8 12.38%
1988 55% Michael Dukakis (D) 348,814 59.5% George Bush (R) 231,137 39.4% 6,200 [+] 1.1% 586,151 -11 -14 12.92%
1984 61% Walter Mondale (D) 372,576 56.0% Ronald Reagan* (R) 284,692 42.8% 8,480 1.3% 665,748 -11 -16 13.74%
1980 56% Jimmy Carter* (D) 297,464 47.9% Ronald Reagan (R) 271,850 43.7% 52,104 [+] 8.4% 621,418 -6 -7 13.62%
1976 60% Jimmy Carter (D) 328,343 50.7% Gerald Ford* (R) 303,127 46.8% 16,387 [+] 2.5% 647,857 -1 -1 14.02%
1972 59% Richard Nixon* (R) 371,737 55.6% George McGovern (D) 282,496 42.3% 14,302 [+] 2.1% 668,535 -4 -5 14.56%
1968 68% Hubert Humphrey (D) 364,906 51.1% Richard Nixon (R) 264,790 37.1% 84,121 [+] 11.8% 713,817 -7 -6 15.03%
1964 69% Lyndon Johnson* (D) 475,207 66.0% Barry Goldwater (R) 241,707 33.6% 2,811 0.4% 719,725 -1 -5 14.92%
1960 71% John Kennedy (D) 428,455 57.1% Richard Nixon (R) 320,970 42.8% 1,293 0.2% 750,718 -6 -7 14.99%
1956 65% Dwight Eisenhower* (R) 384,939 54.8% Adlai Stevenson (D) 315,989 45.0% 1,102 0.2% 702,030 -2 -3 15.34%
1952 70% Adlai Stevenson (D) 370,945 50.6% Dwight Eisenhower (R) 359,224 49.0% 2,903 0.4% 733,072 -4 -6 16.00%
1948 60% Harry Truman* (D) 326,303 54.9% Thomas Dewey (R) 253,272 42.6% 14,931 [+] 2.5% 594,506 -8 -2 15.92%
1944 64% Franklin Roosevelt* (D) 350,690 57.1% Thomas Dewey (R) 261,218 42.5% 2,393 0.4% 614,301 -6 -3 16.19%
1940 68% Franklin Roosevelt* (D) 367,926 58.0% Wendell Willkie (R) 263,285 41.5% 2,849 0.4% 634,060 -5 -3 15.55%
1936 66% Franklin Roosevelt* (D) 366,593 65.2% Alf Landon (R) 176,224 31.3% 19,377 [+] 3.4% 562,194 -9 -5 13.59%
1932 43% Franklin Roosevelt (D) 189,839 52.9% Herbert Hoover* (R) 152,326 42.4% 16,838 [+] 4.7% 359,003 -8 3 12.56%
1928 48% Herbert Hoover (R) 215,626 56.9% Al Smith (D) 160,733 42.4% 2,850 [+] 0.8% 379,209 -8 -1 12.04%
1924 34% Calvin Coolidge (R) 149,296 59.0% Robert LaFollette (Prog) 79,095 31.3% 24,622 [+] 9.7% 253,013 -6 5 11.80%
1920 28% Warren Harding (R) 138,908 69.2% James Cox (D) 40,278 20.1% 21,530 [+] 10.7% 200,716 3 9 10.84%
1916 21% Charles Evans Hughes (R) 77,483 55.2% Woodrow Wilson* (D) 52,833 37.7% 9,948 [+] 7.1% 140,264 1 9 10.81%
1912 20% Theodore Roosevelt (Prog) 50,017 39.6% Woodrow Wilson (D) 31,417 24.9% 44,952 [+] 35.6% 126,386 -4 -4 10.38%
1908 22% William Taft (R) 74,080 60.8% William J. Bryan (D) 35,655 29.2% 12,170 [+] 10.0% 121,905 2 9 9.63%
1904 23% Theodore Roosevelt (R) 90,594 76.5% Alton Parker (D) 21,541 18.2% 6,270 [+] 5.3% 118,405 9 20 9.57%
1900 23% William McKinley* (R) 71,780 69.9% William J. Bryan (D) 27,311 26.6% 3,533 [+] 3.4% 102,624 9 18 8.75%
* incumbent         PSV: percent of state vote



2020 President, Allegheny County, PA
CandidateVotesPct
Joe Biden (D) 430,759 59.4%
Donald Trump* (R) 282,913 39.0%
Jo Jorgensen (Lbt) 8,361 1.2%
Other 2,767 0.4%
TOTAL 724,800
Turnout: 72% Diff (St): -10 Diff (US): -8


2016 President, Allegheny County, PA
CandidateVotesPct
Hillary Clinton (D) 367,617 55.9%
Donald Trump (R) 259,480 39.5%
Gary Johnson (Lbt) 16,102 2.5%
Jill Stein (Grn) 5,097 0.8%
Other 8,893 1.4%
TOTAL 657,189
Turnout: 66% Diff (St): -9 Diff (US): -6


2012 President, Allegheny County, PA
CandidateVotesPct
Barack Obama* (D) 352,687 56.5%
Mitt Romney (R) 262,039 42.0%
Gary Johnson (Lbt) 5,196 0.8%
Other 3,905 0.6%
TOTAL 623,827
Turnout: 63% Diff (St): -5 Diff (US): -5


2008 President, Allegheny County, PA
CandidateVotesPct
Barack Obama (D) 373,153 57.1%
John McCain (R) 272,347 41.6%
Ralph Nader (I) 3,927 0.6%
Bob Barr (Lbt) 2,009 0.3%
Other 2,603 0.4%
TOTAL 654,039
Turnout: 66% Diff (St): -3 Diff (US): -4


2004 President, Allegheny County, PA
CandidateVotesPct
George W. Bush* (R) 271,925 42.1%
John Kerry (D) 368,912 57.2%
Other 4,632 0.7%
TOTAL 645,469
Turnout: 65% Diff (St): -6 Diff (US): -9


2000 President, Allegheny County, PA
CandidateVotesPct
George W. Bush (R) 235,361 40.4%
Albert Gore, Jr. (D) 329,963 56.6%
Ralph Nader (Grn) 10,575 1.8%
Pat Buchanan (Ref) 2,112 0.4%
Other 4,467 0.8%
TOTAL 582,478
Turnout: 58% Diff (St): -6 Diff (US): -7


1996 President, Allegheny County, PA
CandidateVotesPct
Bill Clinton* (D) 284,480 52.8%
Robert Dole (R) 204,067 37.9%
Ross Perot (Ref) 42,309 7.9%
Harry Browne (Lbt) 1,892 0.4%
Other 5,867 1.1%
TOTAL 538,615
Turnout: 53% Diff (St): -2 Diff (US): -3


1992 President, Allegheny County, PA
CandidateVotesPct
Bill Clinton (D) 324,004 52.8%
George Bush* (R) 183,035 29.8%
Ross Perot (I) 103,470 16.8%
Other 3,678 0.6%
TOTAL 614,187
Turnout: 59% Diff (St): -6 Diff (US): -8


1988 President, Allegheny County, PA
CandidateVotesPct
George Bush (R) 231,137 39.4%
Michael Dukakis (D) 348,814 59.5%
Ron Paul (Lbt) 1,011 0.2%
Other 5,189 0.9%
TOTAL 586,151
Turnout: 55% Diff (St): -11 Diff (US): -14


1984 President, Allegheny County, PA
CandidateVotesPct
Ronald Reagan* (R) 284,692 42.8%
Walter Mondale (D) 372,576 56.0%
Other 8,480 1.3%
TOTAL 665,748
Turnout: 61% Diff (St): -11 Diff (US): -16


1980 President, Allegheny County, PA
CandidateVotesPct
Ronald Reagan (R) 271,850 43.7%
Jimmy Carter* (D) 297,464 47.9%
John Anderson (I) 38,710 6.2%
Edward Clark (Lbt) 4,647 0.7%
Other 8,747 1.4%
TOTAL 621,418
Turnout: 56% Diff (St): -6 Diff (US): -7


1976 President, Allegheny County, PA
CandidateVotesPct
Jimmy Carter (D) 328,343 50.7%
Gerald Ford* (R) 303,127 46.8%
Eugene McCarthy (I) 8,625 1.3%
Other 7,762 1.2%
TOTAL 647,857
Turnout: 60% Diff (St): -1 Diff (US): -1


1972 President, Allegheny County, PA
CandidateVotesPct
Richard Nixon* (R) 371,737 55.6%
George McGovern (D) 282,496 42.3%
John Schmitz (Amer) 12,491 1.9%
Other 1,811 0.3%
TOTAL 668,535
Turnout: 59% Diff (St): -4 Diff (US): -5


1968 President, Allegheny County, PA
CandidateVotesPct
Richard Nixon (R) 264,790 37.1%
Hubert Humphrey (D) 364,906 51.1%
George Wallace (AIP) 79,776 11.2%
Other 4,345 0.6%
TOTAL 713,817
Turnout: 68% Diff (St): -7 Diff (US): -6


1964 President, Allegheny County, PA
CandidateVotesPct
Lyndon Johnson* (D) 475,207 66.0%
Barry Goldwater (R) 241,707 33.6%
Other 2,811 0.4%
TOTAL 719,725
Turnout: 69% Diff (St): -1 Diff (US): -5


1960 President, Allegheny County, PA
CandidateVotesPct
John Kennedy (D) 428,455 57.1%
Richard Nixon (R) 320,970 42.8%
Other 1,293 0.2%
TOTAL 750,718
Turnout: 71% Diff (St): -6 Diff (US): -7


1956 President, Allegheny County, PA
CandidateVotesPct
Dwight Eisenhower* (R) 384,939 54.8%
Adlai Stevenson (D) 315,989 45.0%
Other 1,102 0.2%
TOTAL 702,030
Turnout: 65% Diff (St): -2 Diff (US): -3


1952 President, Allegheny County, PA
CandidateVotesPct
Dwight Eisenhower (R) 359,224 49.0%
Adlai Stevenson (D) 370,945 50.6%
Other 2,903 0.4%
TOTAL 733,072
Turnout: 70% Diff (St): -4 Diff (US): -6


1948 President, Allegheny County, PA
CandidateVotesPct
Harry Truman* (D) 326,303 54.9%
Thomas Dewey (R) 253,272 42.6%
Henry Wallace (Prog) 11,164 1.9%
Other 3,767 0.6%
TOTAL 594,506
Turnout: 60% Diff (St): -8 Diff (US): -2


1944 President, Allegheny County, PA
CandidateVotesPct
Franklin Roosevelt* (D) 350,690 57.1%
Thomas Dewey (R) 261,218 42.5%
Other 2,393 0.4%
TOTAL 614,301
Turnout: 64% Diff (St): -6 Diff (US): -3


1940 President, Allegheny County, PA
CandidateVotesPct
Franklin Roosevelt* (D) 367,926 58.0%
Wendell Willkie (R) 263,285 41.5%
Other 2,849 0.4%
TOTAL 634,060
Turnout: 68% Diff (St): -5 Diff (US): -3


1936 President, Allegheny County, PA
CandidateVotesPct
Franklin Roosevelt* (D) 366,593 65.2%
Alf Landon (R) 176,224 31.3%
William Lemke (Union) 16,182 2.9%
Norman Thomas (Soc) 1,531 0.3%
Other 1,664 0.3%
TOTAL 562,194
Turnout: 66% Diff (St): -9 Diff (US): -5


1932 President, Allegheny County, PA
CandidateVotesPct
Franklin Roosevelt (D) 189,839 52.9%
Herbert Hoover* (R) 152,326 42.4%
Norman Thomas (Soc) 14,777 4.1%
Other 2,061 0.6%
TOTAL 359,003
Turnout: 43% Diff (St): -8 Diff (US): 3


1928 President, Allegheny County, PA
CandidateVotesPct
Herbert Hoover (R) 215,626 56.9%
Al Smith (D) 160,733 42.4%
Norman Thomas (Soc) 1,722 0.5%
Other 1,128 0.3%
TOTAL 379,209
Turnout: 48% Diff (St): -8 Diff (US): -1


1924 President, Allegheny County, PA
CandidateVotesPct
Calvin Coolidge (R) 149,296 59.0%
John Davis (D) 21,984 8.7%
Robert LaFollette (Prog) 79,095 31.3%
Other 2,638 1.0%
TOTAL 253,013
Turnout: 34% Diff (St): -6 Diff (US): 5


1920 President, Allegheny County, PA
CandidateVotesPct
Warren Harding (R) 138,908 69.2%
James Cox (D) 40,278 20.1%
Eugene Debs (Soc) 16,262 8.1%
Parley Christiansen (FL) 1,312 0.7%
Aaron Watkins (Proh) 3,670 1.8%
Other 286 0.1%
TOTAL 200,716
Turnout: 28% Diff (St): 3 Diff (US): 9


1916 President, Allegheny County, PA
CandidateVotesPct
Woodrow Wilson* (D) 52,833 37.7%
Charles Evans Hughes (R) 77,483 55.2%
Allan Benson (Soc) 7,815 5.6%
James Hanly (Proh) 2,052 1.5%
Other 81 0.1%
TOTAL 140,264
Turnout: 21% Diff (St): 1 Diff (US): 9


1912 President, Allegheny County, PA
CandidateVotesPct
Woodrow Wilson (D) 31,417 24.9%
Theodore Roosevelt (Prog) 50,017 39.6%
William Taft* (R) 23,822 18.8%
Eugene Debs (Soc) 19,554 15.5%
Eugene Chafin (Proh) 1,402 1.1%
Other 174 0.1%
TOTAL 126,386
Turnout: 20% Diff (St): -4 Diff (US): -4


1908 President, Allegheny County, PA
CandidateVotesPct
William Taft (R) 74,080 60.8%
William J. Bryan (D) 35,655 29.2%
Eugene Debs (Soc) 7,311 6.0%
Eugene Chafin (Proh) 4,550 3.7%
Thomas Hisgen (I) 67 0.1%
Other 242 0.2%
TOTAL 121,905
Turnout: 22% Diff (St): 2 Diff (US): 9


1904 President, Allegheny County, PA
CandidateVotesPct
Theodore Roosevelt (R) 90,594 76.5%
Alton Parker (D) 21,541 18.2%
Eugene Debs (Soc) 3,438 2.9%
Silas Swallow (Proh) 2,216 1.9%
Other 616 0.5%
TOTAL 118,405
Turnout: 23% Diff (St): 9 Diff (US): 20


1900 President, Allegheny County, PA
CandidateVotesPct
William McKinley* (R) 71,780 69.9%
William J. Bryan (D) 27,311 26.6%
John Woolley (Proh) 1,874 1.8%
Eugene Debs (Soc) 424 0.4%
Other 1,235 1.2%
TOTAL 102,624
Turnout: 23% Diff (St): 9 Diff (US): 18
* incumbent

Historical Statewide Election Results for Allegheny County, PA

Click on the Year to view county-level data for that election.

YearTypeTurnout WinnerRunner-Up OtherTotal VotesDiff PSV
2022 S3 57% John Fetterman (D) 363,873 63.4% Mehmet Oz (R) 200,632 35.0% 9,204 [+] 1.6% 573,709 -11 10.69%
2022 G 57% Josh Shapiro (D) 393,386 68.7% Doug Mastriano (R) 169,913 29.7% 9,514 [+] 1.7% 572,813 -12 10.67%
2018 S1 54% Bob Casey, Jr.* (D) 355,907 65.7% Lou Barletta (R) 176,351 32.6% 9,445 [+] 1.7% 541,703 -10 10.81%
2018 G 54% Tom Wolf* (D) 364,710 67.4% Scott Wagner (R) 168,893 31.2% 7,702 [+] 1.4% 541,305 -9 10.80%
2016 S3 65% Katie McGinty (D) 357,450 55.2% Pat Toomey* (R) 261,316 40.4% 28,260 [+] 4.4% 647,026 -8 10.69%
2014 G 36% Tom Wolf (D) 207,017 58.3% Tom Corbett* (R) 148,057 41.7% 0 0.0% 355,074 -3 10.16%
2012 S1 62% Bob Casey, Jr.* (D) 362,459 59.3% Tom Smith (R) 236,546 38.7% 12,106 [+] 2.0% 611,111 -6 10.86%
2010 S3 43% Joe Sestak (D) 232,996 54.8% Pat Toomey (R) 192,257 45.2% 0 0.0% 425,253 -6 10.69%
2010 G 44% Tom Corbett (R) 213,889 50.1% Dan Onorato (D) 213,429 49.9% 0 0.0% 427,318 -4 10.72%
2006 S1 46% Bob Casey, Jr. (D) 298,096 64.9% Rick Santorum* (R) 161,144 35.1% 0 0.0% 459,240 -6 11.25%
2006 G 46% Ed Rendell* (D) 275,227 59.9% Lynn Swann (R) 184,063 40.1% 0 0.0% 459,290 0 11.21%
2004 S3 62% Joseph Hoeffel (D) 298,010 48.1% Arlen Specter* (R) 279,698 45.2% 41,329 [+] 6.7% 619,037 -7 11.14%
2002 G 39% Ed Rendell (D) 209,708 53.7% Mike Fisher (R) 169,414 43.4% 11,664 [+] 3.0% 390,786 -1 10.91%
2000 S1 56% Ron Klink (D) 306,410 54.2% Rick Santorum* (R) 247,405 43.8% 11,393 [+] 2.0% 565,208 -9 11.94%
1998 S3 34% Arlen Specter* (R) 199,654 58.7% Bill Lloyd (D) 125,944 37.1% 14,320 [+] 4.2% 339,918 -3 11.49%
1998 G 35% Tom Ridge* (R) 169,316 48.1% Ivan Itkin (D) 127,994 36.4% 54,408 [+] 15.5% 351,718 -9 11.63%
1994 S1 43% Harris Wofford* (D) 227,172 51.4% Rick Santorum (R) 205,073 46.4% 9,562 [+] 2.2% 441,807 -3 12.58%
1994 G 43% Mark Singel (D) 193,459 43.3% Tom Ridge (R) 180,260 40.3% 73,234 [+] 16.4% 446,953 -5 12.47%
1992 S3 57% Arlen Specter* (R) 293,156 49.4% Lynn Yeakel (D) 277,191 46.7% 23,515 [+] 4.0% 593,862 0 12.37%
1991 S1 41% Harris Wofford (D) 257,482 60.5% Richard Thornburgh (R) 167,881 39.5% 0 0.0% 425,363 -6 12.57%
1990 G 37% Robert Casey* (D) 281,883 71.9% Barbara Hafer (R) 109,895 28.1% 0 0.0% 391,778 -4 12.83%
1988 S1 52% John Heinz* (R) 366,278 65.7% Joseph Vignola (D) 182,846 32.8% 8,135 [+] 1.5% 557,259 -1 12.76%
1986 S3 40% Arlen Specter* (R) 216,279 50.6% Bob Edgar (D) 207,814 48.6% 3,619 [+] 0.8% 427,712 -6 12.66%
1986 G 40% Robert Casey (D) 242,296 56.6% William Scranton III (R) 181,562 42.4% 4,521 [+] 1.1% 428,379 -6 12.64%
1982 S1 46% John Heinz* (R) 303,658 60.1% Cyril Wecht (D) 190,423 37.7% 11,037 [+] 2.2% 505,118 1 14.02%
1982 G 46% Richard Thornburgh* (R) 250,836 49.8% Allen Ertel (D) 244,391 48.5% 8,361 [+] 1.7% 503,588 -1 13.67%
1980 S3 55% Pete Flaherty (D) 371,710 61.5% Arlen Specter (R) 220,216 36.5% 12,182 [+] 2.0% 604,108 -14 13.67%
1978 G 48% Pete Flaherty (D) 258,981 51.1% Richard Thornburgh (R) 241,111 47.6% 6,378 [+] 1.3% 506,470 -5 13.53%
1976 S1 59% John Heinz (R) 420,816 66.0% William Green (D) 209,061 32.8% 8,083 [+] 1.3% 637,960 14 14.03%
1974 S3 44% Pete Flaherty (D) 286,895 58.9% Richard Schweiker* (R) 194,021 39.8% 6,407 [+] 1.3% 487,323 -13 14.01%
1974 G 44% Milton Shapp* (D) 268,636 55.8% Andrew Lewis (R) 204,045 42.4% 8,836 [+] 1.8% 481,517 -3 13.76%
1970 S1 47% William Sesler (D) 240,270 48.2% Hugh Scott* (R) 238,127 47.8% 19,640 [+] 3.9% 498,037 -4 13.67%
1970 G 47% Milton Shapp (D) 308,770 60.8% Raymond Broderick (R) 182,312 35.9% 16,940 [+] 3.3% 508,022 -6 13.73%
1968 S3 66% Richard Schweiker (R) 340,554 49.2% Joseph Clark* (D) 332,665 48.0% 19,483 [+] 2.8% 692,702 -3 14.98%
1966 G 57% Milton Shapp (D) 310,449 52.5% Raymond Shafer (R) 274,577 46.4% 6,568 [+] 1.1% 591,594 -6 14.60%
1964 S1 69% Hugh Scott* (R) 366,958 51.0% Genevieve Blatt (D) 349,843 48.6% 2,932 [+] 0.4% 719,733 0 14.98%
1962 S3 61% Joseph Clark* (D) 375,494 58.2% James Van Zandt (R) 267,274 41.4% 2,049 [+] 0.3% 644,817 -7 14.71%
1962 G 61% William Scranton (R) 348,253 54.0% Richardson Dilworth (D) 294,488 45.6% 2,567 [+] 0.4% 645,308 -1 14.74%
*: incumbent               +: ran on additional party lines               Type: G: Governor; S1,S2,S3: Senate Class 1, 2 or 3
italics: special election           RO: runoff election           PSV: percent of state vote


Historical U.S. House Election Results for Allegheny County, PA

Click on the District to view county-level data for that election (where available).

DateDistrictWinnerRunner-Up OtherTotal Votes
2022-11-08 PA12Summer Lee (D) 166,727 61.0% Mike Doyle (R) 106,615 39.0% 0 0.0% 273,342
2022-11-08 PA17Chris Deluzio (D) 163,040 56.3% Jeremy Shaffer (R) 126,445 43.7% 0 0.0% 289,485
County Total for 2022-11-08:   562,827
2020-11-03 PA17Conor Lamb* (D) 177,474 54.1% Sean Parnell (R) 150,726 45.9% 0 0.0% 328,200
2020-11-03 PA18Mike Doyle* (D) 266,084 69.2% Luke Negron (R) 118,163 30.8% 0 0.0% 384,247
County Total for 2020-11-03:   712,447
2018-11-06 PA17Conor Lamb* (D) 146,310 58.8% Keith Rothfus* (R) 102,697 41.2% 0 0.0% 249,007
2018-11-06 PA18Mike Doyle* (D) 231,472 100.0% 0 0.0% 231,472
County Total for 2018-11-06:   480,479
2018-03-13 sp PA18Conor Lamb (D) 58,874 57.3% Rick Saccone (R) 43,398 42.2% 526 0.5% 102,798
County Total for 2018-03-13:   102,798
2016-11-08 PA12Keith Rothfus* (R) 84,879 58.4% Erin McClelland (D) 60,479 41.6% 0 0.0% 145,358
2016-11-08 PA14Mike Doyle* (D) 250,859 74.7% Lenny McAllister (R) 85,068 25.3% 0 0.0% 335,927
2016-11-08 PA18Tim Murphy* (R) 122,858 100.0% 0 0.0% 122,858
County Total for 2016-11-08:   604,143
2014-11-04 PA12Keith Rothfus* (R) 51,466 59.9% Erin McClelland (D) 34,517 40.1% 0 0.0% 85,983
2014-11-04 PA14Mike Doyle* (D) 145,296 100.0% 0 0.0% 145,296
2014-11-04 PA18Tim Murphy* (R) 68,922 100.0% 0 0.0% 68,922
County Total for 2014-11-04:   300,201
2012-11-06 PA12Keith Rothfus (R) 76,022 56.1% Mark Critz* (D) 59,539 43.9% 0 0.0% 135,561
2012-11-06 PA14Mike Doyle* (D) 247,356 77.2% Hans Lessmann (R) 73,126 22.8% 0 0.0% 320,482
2012-11-06 PA18Tim Murphy* (R) 93,880 64.0% Larry Maggi (D) 52,883 36.0% 0 0.0% 146,763
County Total for 2012-11-06:   602,806
2010-11-02 PA04Keith Rothfus (R) 56,273 50.2% Jason Altmire* (D) 55,813 49.8% 0 0.0% 112,086
2010-11-02 PA12Mark Critz* (D) 774 54.3% Tim Burns (R) 652 45.7% 0 0.0% 1,426
2010-11-02 PA14Mike Doyle* (D) 122,073 68.8% Melissa Haluszchak (R) 49,997 28.2% 5,400 3.0% 177,470
2010-11-02 PA18Tim Murphy* (R) 85,235 63.8% Dan Connolly (D) 48,361 36.2% 0 0.0% 133,596
County Total for 2010-11-02:   424,578
2010-05-18 sp PA12Mark Critz (D) 520 57.5% Tim Burns (R) 361 39.9% 23 2.5% 904
County Total for 2010-05-18:   904
2008-11-04 PA04Jason Altmire* (D) 81,963 53.5% Melissa Hart (R) 71,130 46.5% 0 0.0% 153,093
2008-11-04 PA12John Murtha* (D) 1,333 58.6% Bill Russell (R) 940 41.4% 0 0.0% 2,273
2008-11-04 PA14Mike Doyle* (D) 242,326 91.3% Titus North (Green) 23,214 8.7% 0 0.0% 265,540
2008-11-04 PA18Tim Murphy* (R) 115,585 61.9% Steve O'Donnell (D) 71,272 38.1% 0 0.0% 186,857
County Total for 2008-11-04:   607,763
2006-11-07 PA04Melissa Hart* (R) 59,993 50.8% Jason Altmire (D) 58,180 49.2% 0 0.0% 118,173
2006-11-07 PA12John Murtha* (D) 1,040 63.2% Diana Irey (R) 606 36.8% 0 0.0% 1,646
2006-11-07 PA14Mike Doyle* (D) 161,075 90.1% Titus North (Green) 17,720 9.9% 0 0.0% 178,795
2006-11-07 PA18Tim Murphy* (R) 78,661 55.4% Chad Kluko (D) 63,232 44.6% 0 0.0% 141,893
County Total for 2006-11-07:   440,507
2004-11-02 PA04Melissa Hart* (R) 97,754 66.7% Stevan Drobac (D) 47,653 32.5% 1,229 0.8% 146,636
2004-11-02 PA12John Murtha* (D) 1,573 100.0% 0 0.0% 1,573
2004-11-02 PA14Mike Doyle* (D) 220,139 100.0% 0 0.0% 220,139
2004-11-02 PA18Tim Murphy* (R) 110,573 61.5% Mark Boles (D) 69,183 38.5% 0 0.0% 179,756
County Total for 2004-11-02:   548,104
2002-11-05 PA04Melissa Hart* (R) 63,374 69.5% Stevan Drobac (D) 27,873 30.5% 0 0.0% 91,247
2002-11-05 PA12John Murtha* (D) 832 72.7% Bill Choby (R) 312 27.3% 0 0.0% 1,144
2002-11-05 PA14Mike Doyle* (D) 123,323 100.0% 0 0.0% 123,323
2002-11-05 PA18Tim Murphy (R) 69,533 60.7% Jack Machek (D) 44,962 39.3% 0 0.0% 114,495
County Total for 2002-11-05:   330,209
2000-11-07 PA04Melissa Hart (R) 24,610 63.8% Terry Van Horne (D) 13,948 36.2% 0 0.0% 38,558
2000-11-07 PA14William Coyne* (D) 147,533 100.0% 0 0.0% 147,533
2000-11-07 PA18Mike Doyle* (D) 156,131 69.4% Craig Stephens (R) 68,798 30.6% 0 0.0% 224,929
2000-11-07 PA20Frank Mascara* (D) 29,952 52.1% Ronald Davis (R) 27,492 47.9% 0 0.0% 57,444
County Total for 2000-11-07:   468,464
1996-11-05 PA04Ron Klink* (D) 19,282 59.3% Paul Adametz (R) 13,237 40.7% 0 0.0% 32,519
1996-11-05 PA14William Coyne* (D) 122,922 60.7% Bill Ravotti (R) 78,921 39.0% 713 0.4% 202,556
1996-11-05 PA18Mike Doyle* (D) 120,410 56.0% David Fawcett (R) 86,829 40.4% 7,742 3.6% 214,981
1996-11-05 PA20Mike McCormick (R) 30,775 58.8% Frank Mascara* (D) 21,556 41.2% 0 0.0% 52,331
County Total for 1996-11-05:   502,387
1994-11-08 PA04Ron Klink* (D) 16,919 63.1% Ed Peglow (R) 9,875 36.9% 0 0.0% 26,794
1994-11-08 PA14William Coyne* (D) 105,310 64.1% John Clark (R) 53,221 32.4% 5,645 3.4% 164,176
1994-11-08 PA18Mike Doyle (D) 101,784 54.8% John McCarty (R) 83,881 45.2% 0 0.0% 185,665
1994-11-08 PA20Mike McCormick (R) 25,855 60.2% Frank Mascara (D) 17,070 39.8% 0 0.0% 42,925
County Total for 1994-11-08:   419,560
1992-11-03 PA04Ron Klink (D) 25,843 75.6% Gordon Johnston (R) 8,021 23.5% 331 1.0% 34,195
1992-11-03 PA14William Coyne* (D) 165,633 72.3% Byron King (R) 61,311 26.8% 2,094 0.9% 229,038
1992-11-03 PA18Rick Santorum* (R) 154,024 60.6% Frank Pecora (D) 96,655 38.0% 3,650 1.4% 254,329
1992-11-03 PA20Bill Townsend (R) 31,997 58.8% Austin Murphy* (D) 22,425 41.2% 0 0.0% 54,422
County Total for 1992-11-03:   571,984
*: incumbent           sp: special election           RO: runoff election

Voter Registration Data for Allegheny County, PA

YearTotalRepublicanDemocratOtherR/D EdgeR/D Edge %VAPOP %
2024 951,851 274,048 28.8% 525,826 55.2% 151,977 16.0% Dem +251,778 Dem +26.5% 96%
2022 939,418 264,198 28.1% 534,242 56.9% 140,978 15.0% Dem +270,044 Dem +28.7% 94%
2020 942,857 268,044 28.4% 539,946 57.3% 134,867 14.3% Dem +271,902 Dem +28.8% 94%
2018 941,034 261,942 27.8% 546,643 58.1% 132,449 14.1% Dem +284,701 Dem +30.3% 94%
2016 924,573 259,523 28.1% 539,866 58.4% 125,184 13.5% Dem +280,343 Dem +30.3% 93%
2014 881,574 238,048 27.0% 526,437 59.7% 117,089 13.3% Dem +288,389 Dem +32.7% 89%
2012 924,352 250,279 27.1% 556,820 60.2% 117,253 12.7% Dem +306,541 Dem +33.2% 94%
2010 907,873 244,260 26.9% 559,765 61.7% 103,848 11.4% Dem +315,505 Dem +34.8% 92%
2008 956,096 256,320 26.8% 595,222 62.3% 104,554 10.9% Dem +338,902 Dem +35.4% 97%
2006 893,510 253,613 28.4% 541,820 60.6% 98,077 11.0% Dem +288,207 Dem +32.3% 90%
2004 906,091 258,336 28.5% 552,525 61.0% 95,230 10.5% Dem +294,189 Dem +32.5% 91%
2002 926,434 265,014 28.6% 571,668 61.7% 89,752 9.7% Dem +306,654 Dem +33.1% 93%
2000 914,894 260,791 28.5% 568,560 62.1% 85,543 9.4% Dem +307,769 Dem +33.6% 91%
1998 849,141 240,172 28.3% 538,283 63.4% 70,686 8.3% Dem +298,111 Dem +35.1% 84%
1996 808,503 228,385 28.2% 517,580 64.0% 62,538 7.7% Dem +289,195 Dem +35.8% 79%
1994 720,934 196,055 27.2% 478,804 66.4% 46,075 6.4% Dem +282,749 Dem +39.2% 70%
1992 730,613 198,827 27.2% 486,861 66.6% 44,925 6.1% Dem +288,034 Dem +39.4% 70%
1990 716,901 196,499 27.4% 485,932 67.8% 34,470 4.8% Dem +289,433 Dem +40.4% 68%
1988 750,302 205,486 27.4% 508,422 67.8% 36,394 4.9% Dem +302,936 Dem +40.4% 71%
1986 792,774 211,752 26.7% 539,115 68.0% 41,907 5.3% Dem +327,363 Dem +41.3% 74%
1984 836,953 223,900 26.8% 566,484 67.7% 46,569 5.6% Dem +342,584 Dem +40.9% 77%
VAPOP% is the estimated percentage of voting age population that is registered.
Registration data may include "inactive" voters.   Data for each year pertains to the November elections.