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Washington County, PA


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

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

 

Tracts in Washington County, PA

   



Click here to view demographic data for Washington County, PA

2024 population: 210,434   ( 1,089 from 2020)
Land area: 857.0 square miles
Population density: 245.5 persons per square mile

2024 Census data
White:190,664 90.61% 0.7%
Black:6,9583.31% 4.9%
Indian:2680.13% 16.5%
Asian:3,3241.58% 34.6%
2+ races:4,4392.11% 12.3%
Hispanic:4,7812.27% 19.6%
Total non-White:19,7709.39% 14.4%

2020-2024 ComponentsNumberRate
Births:7,874 9.4
Deaths:11,81014.1
Net Migration: 4,2165.0
Net Immigration: 8291.0
Change in White population:-1,395 -0.7
Change in Non-White pop.:2,484 1.2



Historical Presidential Election Results for Washington County, PA

Recent Trends
VotesΔ MarginSwing %
2024 vs. 2020 R +3,849 R +4,027 R + 2.6%
D -178
2024 vs. 2016 R +14,543 R +5,955 R + 0.0%
D +8,588
2020 vs. 2016 R +10,694 R +1,928 D + 2.6%
D +8,766
2024 vs. 2012 R +22,699 R +18,134 R + 11.9%
D +4,565
2016 vs. 2008 R +10,634 R +20,434 R + 20.9%
D -9,800
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 72% Donald Trump (R) 75,929 62.3% Kamala Harris (D) 44,910 36.8% 1,117 [+] 0.9% 121,956 12 13 1.73%
2020 71% Donald Trump* (R) 72,080 60.7% Joe Biden (D) 45,088 38.0% 1,588 [+] 1.3% 118,756 12 14 1.71%
2016 61% Donald Trump (R) 61,386 60.0% Hillary Clinton (D) 36,322 35.5% 4,559 [+] 4.5% 102,267 12 14 1.66%
2012 57% Mitt Romney (R) 53,230 56.0% Barack Obama* (D) 40,345 42.5% 1,403 [+] 1.5% 94,978 9 9 1.65%
2008 60% John McCain (R) 50,752 51.5% Barack Obama (D) 46,122 46.8% 1,642 [+] 1.7% 98,516 7 6 1.64%
2004 60% John Kerry (D) 48,225 50.1% George W. Bush* (R) 47,673 49.6% 279 [+] 0.3% 96,177 1 -1 1.67%
2000 54% Albert Gore, Jr. (D) 44,961 53.2% George W. Bush (R) 37,339 44.2% 2,141 [+] 2.5% 84,441 -2 -4 1.72%
1996 49% Bill Clinton* (D) 40,952 52.7% Robert Dole (R) 27,777 35.7% 9,016 [+] 11.6% 77,745 -4 -5 1.73%
1992 53% Bill Clinton (D) 46,143 54.7% George Bush* (R) 21,977 26.1% 16,244 [+] 19.3% 84,364 -10 -11 1.70%
1988 48% Michael Dukakis (D) 47,527 62.1% George Bush (R) 28,651 37.4% 375 [+] 0.5% 76,553 -13 -16 1.69%
1984 54% Walter Mondale (D) 50,911 59.2% Ronald Reagan* (R) 34,782 40.5% 244 0.3% 85,937 -13 -18 1.77%
1980 51% Jimmy Carter* (D) 45,295 55.2% Ronald Reagan (R) 32,532 39.7% 4,191 [+] 5.1% 82,018 -10 -11 1.80%
1976 56% Jimmy Carter (D) 49,317 59.2% Gerald Ford* (R) 32,827 39.4% 1,107 [+] 1.3% 83,251 -8 -9 1.80%
1972 53% Richard Nixon* (R) 42,587 54.0% George McGovern (D) 34,781 44.1% 1,494 [+] 1.9% 78,862 -5 -7 1.72%
1968 63% Hubert Humphrey (D) 47,805 56.3% Richard Nixon (R) 28,023 33.0% 9,140 [+] 10.8% 84,968 -11 -10 1.79%
1964 65% Lyndon Johnson* (D) 63,482 72.3% Barry Goldwater (R) 24,127 27.5% 147 0.2% 87,756 -7 -11 1.82%
1960 67% John Kennedy (D) 53,729 58.3% Richard Nixon (R) 38,348 41.6% 120 0.1% 92,197 -7 -8 1.84%
1956 62% Adlai Stevenson (D) 48,052 54.8% Dwight Eisenhower* (R) 39,465 45.0% 98 0.1% 87,615 -11 -12 1.91%
1952 65% Adlai Stevenson (D) 55,725 60.5% Dwight Eisenhower (R) 36,041 39.2% 270 0.3% 92,036 -14 -16 2.01%
1948 56% Harry Truman* (D) 46,327 61.6% Thomas Dewey (R) 26,860 35.7% 1,979 [+] 2.6% 75,166 -15 -9 2.01%
1944 55% Franklin Roosevelt* (D) 46,023 62.2% Thomas Dewey (R) 27,615 37.3% 392 0.5% 74,030 -11 -9 1.95%
1940 59% Franklin Roosevelt* (D) 50,829 63.4% Wendell Willkie (R) 29,026 36.2% 285 0.4% 80,140 -10 -9 1.96%
1936 63% Franklin Roosevelt* (D) 52,878 68.5% Alf Landon (R) 23,342 30.2% 948 [+] 1.2% 77,168 -11 -6 1.86%
1932 43% Franklin Roosevelt (D) 28,934 55.1% Herbert Hoover* (R) 21,447 40.8% 2,155 [+] 4.1% 52,536 -10 1 1.84%
1928 42% Herbert Hoover (R) 31,099 63.6% Al Smith (D) 17,149 35.1% 645 [+] 1.3% 48,893 -2 5 1.55%
1924 33% Calvin Coolidge (R) 22,315 60.6% Robert LaFollette (Prog) 7,089 19.3% 7,393 [+] 20.1% 36,797 -5 7 1.72%
1920 27% Warren Harding (R) 18,514 62.5% James Cox (D) 8,827 29.8% 2,284 [+] 7.7% 29,625 -3 2 1.60%
1916 20% Charles Evans Hughes (R) 10,367 52.4% Woodrow Wilson* (D) 7,747 39.1% 1,674 [+] 8.5% 19,788 -2 6 1.53%
1912 21% Theodore Roosevelt (Prog) 6,395 34.2% Woodrow Wilson (D) 5,563 29.8% 6,739 [+] 36.0% 18,697 1 0 1.54%
1908 27% William Taft (R) 11,430 56.3% William J. Bryan (D) 7,018 34.6% 1,850 [+] 9.1% 20,298 -3 5 1.60%
1904 27% Theodore Roosevelt (R) 11,530 66.0% Alton Parker (D) 4,886 28.0% 1,051 [+] 6.0% 17,467 -2 10 1.41%
1900 34% William McKinley* (R) 10,408 59.4% William J. Bryan (D) 6,380 36.4% 733 [+] 4.2% 17,521 -1 8 1.49%
* incumbent         PSV: percent of state vote

Historical Statewide Election Results for Washington County, PA

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

YearTypeTurnout WinnerRunner-Up OtherTotal VotesDiff PSV
2024 S1 72% Dave McCormick (R) 71,798 59.6% Bob Casey, Jr.* (D) 45,926 38.1% 2,717 [+] 2.3% 120,441 11 1.73%
2022 S3 56% Mehmet Oz (R) 52,337 55.8% John Fetterman (D) 39,684 42.3% 1,815 [+] 1.9% 93,836 9 1.75%
2022 G 56% Doug Mastriano (R) 47,052 50.3% Josh Shapiro (D) 45,030 48.1% 1,535 [+] 1.6% 93,617 9 1.74%
2018 S1 49% Lou Barletta (R) 41,958 50.9% Bob Casey, Jr.* (D) 39,220 47.5% 1,318 [+] 1.6% 82,496 8 1.65%
2018 G 49% Scott Wagner (R) 40,662 49.3% Tom Wolf* (D) 39,898 48.4% 1,858 [+] 2.3% 82,418 9 1.64%
2016 S3 60% Pat Toomey* (R) 56,952 56.4% Katie McGinty (D) 38,133 37.8% 5,824 [+] 5.8% 100,909 8 1.67%
2014 G 36% Tom Corbett* (R) 31,203 51.8% Tom Wolf (D) 29,058 48.2% 0 0.0% 60,261 7 1.72%
2012 S1 56% Tom Smith (R) 48,047 51.3% Bob Casey, Jr.* (D) 43,711 46.7% 1,850 [+] 2.0% 93,608 7 1.66%
2010 S3 42% Pat Toomey (R) 37,957 54.5% Joe Sestak (D) 31,689 45.5% 0 0.0% 69,646 3 1.75%
2010 G 43% Tom Corbett (R) 41,984 59.8% Dan Onorato (D) 28,211 40.2% 0 0.0% 70,195 5 1.76%
2006 S1 45% Bob Casey, Jr. (D) 43,067 59.4% Rick Santorum* (R) 29,417 40.6% 0 0.0% 72,484 -1 1.78%
2006 G 45% Ed Rendell* (D) 38,422 52.7% Lynn Swann (R) 34,440 47.3% 0 0.0% 72,862 8 1.78%
2004 S3 59% Arlen Specter* (R) 46,493 49.1% Joseph Hoeffel (D) 40,534 42.8% 7,739 [+] 8.2% 94,766 -4 1.70%
2002 G 38% Ed Rendell (D) 30,368 50.7% Mike Fisher (R) 28,368 47.3% 1,202 [+] 2.0% 59,938 3 1.67%
2000 S1 53% Ron Klink (D) 42,934 51.5% Rick Santorum* (R) 36,908 44.3% 3,542 [+] 4.2% 83,384 -8 1.76%
1998 S3 33% Arlen Specter* (R) 29,289 56.6% Bill Lloyd (D) 20,535 39.7% 1,903 [+] 3.7% 51,727 -5 1.75%
1998 G 33% Tom Ridge* (R) 22,825 43.6% Ivan Itkin (D) 20,050 38.3% 9,518 [+] 18.2% 52,393 -14 1.73%
1994 S1 42% Harris Wofford* (D) 34,618 52.5% Rick Santorum (R) 28,726 43.5% 2,655 [+] 4.0% 65,999 -6 1.88%
1994 G 42% Mark Singel (D) 30,856 46.8% Tom Ridge (R) 25,852 39.2% 9,224 [+] 14.0% 65,932 -6 1.84%
1992 S3 53% Lynn Yeakel (D) 42,842 51.3% Arlen Specter* (R) 36,739 44.0% 3,876 [+] 4.6% 83,457 -5 1.74%
1991 S1 39% Harris Wofford (D) 40,415 65.2% Richard Thornburgh (R) 21,612 34.8% 0 0.0% 62,027 -10 1.83%
1990 G 34% Robert Casey* (D) 40,354 74.6% Barbara Hafer (R) 13,734 25.4% 0 0.0% 54,088 -7 1.77%
1988 S1 48% John Heinz* (R) 49,976 66.0% Joseph Vignola (D) 25,073 33.1% 660 [+] 0.9% 75,709 0 1.73%
1986 S3 38% Arlen Specter* (R) 30,526 50.1% Bob Edgar (D) 30,095 49.4% 333 [+] 0.5% 60,954 -6 1.80%
1986 G 38% Robert Casey (D) 37,308 61.3% William Scranton III (R) 23,033 37.9% 481 [+] 0.8% 60,822 -10 1.80%
1982 S1 43% John Heinz* (R) 36,434 52.6% Cyril Wecht (D) 32,133 46.4% 733 [+] 1.1% 69,300 -7 1.92%
1982 G 43% Allen Ertel (D) 39,398 57.0% Richard Thornburgh* (R) 29,322 42.4% 451 [+] 0.7% 69,171 -8 1.88%
1980 S3 51% Pete Flaherty (D) 58,732 71.4% Arlen Specter (R) 22,986 27.9% 592 [+] 0.7% 82,310 -23 1.86%
1978 G 45% Pete Flaherty (D) 44,491 65.9% Richard Thornburgh (R) 22,796 33.8% 250 [+] 0.4% 67,537 -19 1.80%
1976 S1 55% John Heinz (R) 47,196 56.8% William Green (D) 35,433 42.7% 410 [+] 0.5% 83,039 4 1.83%
1974 S3 43% Pete Flaherty (D) 40,613 64.0% Richard Schweiker* (R) 22,456 35.4% 428 [+] 0.7% 63,497 -18 1.83%
1974 G 42% Milton Shapp* (D) 35,330 56.1% Andrew Lewis (R) 26,721 42.4% 908 [+] 1.4% 62,959 -3 1.80%
1970 S1 47% William Sesler (D) 35,092 54.2% Hugh Scott* (R) 27,902 43.1% 1,755 [+] 2.7% 64,749 -8 1.78%
1970 G 47% Milton Shapp (D) 42,982 66.2% Raymond Broderick (R) 20,273 31.2% 1,640 [+] 2.5% 64,895 -10 1.75%
1968 S3 63% Joseph Clark* (D) 42,613 50.7% Richard Schweiker (R) 39,195 46.7% 2,184 [+] 2.6% 83,992 -5 1.82%
1966 G 54% Milton Shapp (D) 41,574 57.5% Raymond Shafer (R) 29,953 41.5% 724 [+] 1.0% 72,251 -11 1.78%
1964 S1 65% Genevieve Blatt (D) 46,876 53.5% Hugh Scott* (R) 40,520 46.2% 253 [+] 0.3% 87,649 -4 1.82%
1962 S3 59% Joseph Clark* (D) 49,546 61.5% James Van Zandt (R) 30,759 38.2% 215 [+] 0.3% 80,520 -10 1.84%
1962 G 59% Richardson Dilworth (D) 41,043 50.9% William Scranton (R) 39,235 48.7% 332 [+] 0.4% 80,610 -7 1.84%
*: 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 Washington County, PA

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

DateDistrictWinnerRunner-Up OtherTotal Votes
2024-11-05 PA14Guy Reschenthaler* (R) 73,710 63.0% Christopher Dziados (D) 43,371 37.0% 0 0.0% 117,081
County Total for 2024-11-05:   117,081
2022-11-08 PA14Guy Reschenthaler* (R) 63,293 100.0% 0 0.0% 63,293
County Total for 2022-11-08:   63,293
2020-11-03 PA14Guy Reschenthaler* (R) 73,826 63.1% Mark Marx (D) 43,182 36.9% 0 0.0% 117,008
County Total for 2020-11-03:   117,008
2018-11-06 PA14Guy Reschenthaler (R) 45,313 57.4% Bibiana Boerio (D) 33,601 42.6% 0 0.0% 78,914
County Total for 2018-11-06:   78,914
2018-03-13 sp PA18Rick Saccone (R) 26,198 53.1% Conor Lamb (D) 22,757 46.2% 344 0.7% 49,299
County Total for 2018-03-13:   49,299
2016-11-08 PA09Bill Shuster* (R) 10,967 57.5% Art Halvorson (D) 8,110 42.5% 0 0.0% 19,077
2016-11-08 PA18Tim Murphy* (R) 64,709 100.0% 0 0.0% 64,709
County Total for 2016-11-08:   83,786
2014-11-04 PA09Alanna Hartzok (D) 6,033 53.2% Bill Shuster* (R) 5,301 46.8% 0 0.0% 11,334
2014-11-04 PA18Tim Murphy* (R) 37,364 100.0% 0 0.0% 37,364
County Total for 2014-11-04:   48,698
2012-11-06 PA09Karen Ramsburg (D) 10,397 57.2% Bill Shuster* (R) 7,778 42.8% 0 0.0% 18,175
2012-11-06 PA18Tim Murphy* (R) 43,591 58.2% Larry Maggi (D) 31,313 41.8% 0 0.0% 74,904
County Total for 2012-11-06:   93,079
2010-11-02 PA12Mark Critz* (D) 16,048 52.6% Tim Burns (R) 14,466 47.4% 0 0.0% 30,514
2010-11-02 PA18Tim Murphy* (R) 27,409 70.4% Dan Connolly (D) 11,503 29.6% 0 0.0% 38,912
County Total for 2010-11-02:   69,426
2010-05-18 sp PA12Mark Critz (D) 10,726 49.6% Tim Burns (R) 9,949 46.0% 937 4.3% 21,612
County Total for 2010-05-18:   21,612
2008-11-04 PA12John Murtha* (D) 24,729 55.2% Bill Russell (R) 20,069 44.8% 0 0.0% 44,798
2008-11-04 PA18Tim Murphy* (R) 35,458 67.6% Steve O'Donnell (D) 16,975 32.4% 0 0.0% 52,433
County Total for 2008-11-04:   97,231
2006-11-07 PA12John Murtha* (D) 19,185 57.9% Diana Irey (R) 13,970 42.1% 0 0.0% 33,155
2006-11-07 PA18Tim Murphy* (R) 23,840 61.2% Chad Kluko (D) 15,092 38.8% 0 0.0% 38,932
County Total for 2006-11-07:   72,087
2004-11-02 PA12John Murtha* (D) 35,820 100.0% 0 0.0% 35,820
2004-11-02 PA18Tim Murphy* (R) 31,202 63.3% Mark Boles (D) 18,062 36.7% 0 0.0% 49,264
County Total for 2004-11-02:   85,084
2002-11-05 PA12John Murtha* (D) 19,403 69.9% Bill Choby (R) 8,366 30.1% 0 0.0% 27,769
2002-11-05 PA18Tim Murphy (R) 18,308 59.7% Jack Machek (D) 12,337 40.3% 0 0.0% 30,645
County Total for 2002-11-05:   58,414
2000-11-07 PA20Frank Mascara* (D) 57,112 68.7% Ronald Davis (R) 26,054 31.3% 0 0.0% 83,166
County Total for 2000-11-07:   83,166
1996-11-05 PA20Frank Mascara* (D) 43,964 57.1% Mike McCormick (R) 33,015 42.9% 0 0.0% 76,979
County Total for 1996-11-05:   76,979
1994-11-08 PA20Frank Mascara (D) 35,882 54.3% Mike McCormick (R) 30,167 45.7% 0 0.0% 66,049
County Total for 1994-11-08:   66,049
1992-11-03 PA20Bill Townsend (R) 42,027 50.6% Austin Murphy* (D) 40,957 49.4% 0 0.0% 82,984
County Total for 1992-11-03:   82,984
*: incumbent           sp: special election           RO: runoff election

Voter Registration Data for Washington County, PA

YearTotalRepublicanDemocratOtherR/D EdgeR/D Edge %VAPOP %
2025 145,182 72,780 50.1% 53,123 36.6% 19,279 13.3% Rep +19,657 Rep +13.5% 86%
2024 148,845 73,422 49.3% 55,908 37.6% 19,515 13.1% Rep +17,514 Rep +11.8% 88%
2022 144,522 67,875 47.0% 58,617 40.6% 18,030 12.5% Rep +9,258 Rep +6.4% 86%
2020 153,954 68,179 44.3% 67,024 43.5% 18,751 12.2% Rep +1,155 Rep +0.8% 91%
2018 141,406 57,917 41.0% 66,867 47.3% 16,622 11.8% Dem +8,950 Dem +6.3% 84%
2016 138,789 55,286 39.8% 68,011 49.0% 15,492 11.2% Dem +12,725 Dem +9.2% 83%
2014 139,842 49,283 35.2% 74,592 53.3% 15,967 11.4% Dem +25,309 Dem +18.1% 84%
2012 142,444 49,282 34.6% 78,001 54.8% 15,161 10.6% Dem +28,719 Dem +20.2% 86%
2010 138,541 46,206 33.4% 78,912 57.0% 13,423 9.7% Dem +32,706 Dem +23.6% 84%
2008 152,517 49,011 32.1% 89,034 58.4% 14,472 9.5% Dem +40,023 Dem +26.2% 93%
2006 154,904 50,259 32.4% 90,247 58.3% 14,398 9.3% Dem +39,988 Dem +25.8% 95%
2004 149,049 47,032 31.6% 88,687 59.5% 13,330 8.9% Dem +41,655 Dem +27.9% 93%
2002 140,678 42,477 30.2% 86,269 61.3% 11,932 8.5% Dem +43,792 Dem +31.1% 88%
2000 138,124 40,948 29.6% 85,898 62.2% 11,278 8.2% Dem +44,950 Dem +32.5% 88%
1998 130,994 37,396 28.5% 84,100 64.2% 9,498 7.3% Dem +46,704 Dem +35.7% 83%
1996 120,050 33,962 28.3% 77,977 65.0% 8,111 6.8% Dem +44,015 Dem +36.7% 76%
1994 103,993 27,761 26.7% 70,529 67.8% 5,703 5.5% Dem +42,768 Dem +41.1% 66%
1992 102,501 26,815 26.2% 70,466 68.7% 5,220 5.1% Dem +43,651 Dem +42.6% 65%
1990 97,465 25,827 26.5% 67,744 69.5% 3,894 4.0% Dem +41,917 Dem +43.0% 61%
1988 97,839 25,818 26.4% 67,863 69.4% 4,158 4.2% Dem +42,045 Dem +43.0% 62%
1986 103,624 26,392 25.5% 73,239 70.7% 3,993 3.9% Dem +46,847 Dem +45.2% 65%
1984 109,165 27,920 25.6% 77,038 70.6% 4,207 3.9% Dem +49,118 Dem +45.0% 68%
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.