County record · fips 42003 · Pennsylvania
AlleghenyPA
Democratic ×13 since 1976all 40 elections, 1868–2024
The Long Record
40 elections against the Pennsylvania and national vote
2024 result
D+20.5
won by Democrats
Record since first cycle
23–17
Dem–Rep two-party wins
Voted with the winner
28/40
70% of its elections
Closest election
1952
D+1.6
this countyPennsylvanianational (official)dot colour = two-party winner · hollow = tie or unknown total · click a dot to open that election
The Biggest Swings
Cycle-over-cycle change in the two-party margin, in points
| Election | Swing | Toward |
|---|---|---|
| 1928 | +59.7 pts | Democrats |
| 1912 | +48.8 pts | Democrats |
| 1920 | -36.1 pts | Republicans |
| 1916 | -32.7 pts | Republicans |
| 1972 | -29.5 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
1,238,177
College (BA+)
46%
Median income
$78,548
2024 dollars
Non-white
25%
Rural
2%
Age 65+
20%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.