2024 results by precinct
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Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 429,916 | 283,595 | 723,799 | |
| 2020 | D | 429,065 | 282,324 | 719,733 | |
| 2016 | D | 367,617 | 259,480 | 657,189 | |
| 2012 | D | 352,687 | 262,039 | 623,827 | |
| 2008 | D | 373,153 | 272,347 | 651,436 | |
| 2004 | D | 368,912 | 271,925 | 645,469 | |
| 2000 | D | 329,963 | 235,361 | 582,478 | |
| 1996 | D | 284,480 | 204,067 | 538,615 | |
| 1992 | D | 324,004 | 183,035 | 614,187 | |
| 1988 | D | 348,814 | 231,137 | 586,151 | |
| 1984 | D | 372,576 | 284,692 | 665,748 | |
| 1980 | D | 297,464 | 271,850 | 621,418 | |
| 1976 | D | 328,343 | 303,127 | 647,857 | |
| 1972 | R | 282,496 | 371,737 | 668,535 | |
| 1968 | D | 364,906 | 264,790 | 713,817 | |
| 1964 | D | 475,207 | 241,707 | 719,725 | |
| 1960 | D | 428,455 | 320,970 | 750,718 | |
| 1956 | R | 315,989 | 384,939 | 702,030 | |
| 1952 | D | 370,945 | 359,224 | 733,072 | |
| 1948 | D | 326,303 | 253,272 | 594,506 | |
| 1944 | D | 350,690 | 261,218 | 614,301 | |
| 1940 | D | 367,926 | 263,285 | 634,198 | |
| 1936 | D | 366,593 | 176,224 | 562,194 | |
| 1932 | D | 189,839 | 152,326 | 359,003 | |
| 1928 | R | 160,733 | 215,626 | 379,209 | |
| 1924 | R | 21,984 | 149,296 | 253,013 | |
| 1920 | R | 40,278 | 138,908 | 200,716 | |
| 1916 | R | 52,833 | 77,483 | 140,264 | |
| 1912 | D | 31,417 | 23,822 | 126,386 | |
| 1908 | R | 35,655 | 74,080 | 121,905 | |
| 1904 | R | 21,541 | 90,594 | 118,405 | |
| 1900 | R | 27,311 | 71,780 | 102,624 | |
| 1896 | R | 29,809 | 76,691 | 108,174 | |
| 1892 | R | 30,867 | 45,788 | 78,504 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
American
100.0%
Polish
0.5%
African American
10.0%
Multiple ancestry combinations reported; no single grouping above 1%.
American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.
Source · American Community Survey 5-year estimates, 2024 release. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 40.6 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$78,548
Allegheny County ranks in the top 25% of US counties.
Allegheny County$78,548
Pennsylvania$77,971
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
11.5%
Children face moderate poverty.
Children under 1818.0%
Working age (18–64)100.0%
Seniors (65+)18.0%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
0.0%
speak English only
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 39.3% of residents not counted as adherents by any reporting body.
Allegheny County, Pennsylvania's second-most-populous, delivered a 20-point Democratic margin in 2024, making it one of the state's most decisive counterweights to rural Republican strongholds in statewide contests.
The Democratic margin in Allegheny County has been steady. It reached its modern peak at thirty-four points in 1936; the 2024 margin was twenty points, still in line with the county's long pattern.
Allegheny County's political identity is inseparable from its demographic profile: a 76% non-Hispanic-white share, a median household income of $78,548, and the full diversity of a major metropolitan center. The county's voting pattern resembles other major urban centers most closely — District of Columbia and Jackson County.
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