Allegheny, Pennsylvania — Presidential Election Results
Allegheny, Pennsylvania has voted Democratic in 7 of the last 7 presidential elections on record (2000–2024). In 2024, it was 22.2 pts more Dem. than Pennsylvania overall.
Jump to year: 2000 · 2004 · 2008 · 2012 · 2016 · 2020 · 2024
Full Election History, 2000–2024
| Year | Winner | Party | Votes | Vote Share | Margin | Total Votes Cast | Swing | Vs. Pennsylvania |
|---|---|---|---|---|---|---|---|---|
| 2000 | Al Gore | Democratic | 329,963 | 56.6% | 16.2 pts (94,602 votes) | 582,478 | — | 12.4 pts more Dem. |
| 2004 | John Kerry | Democratic | 368,912 | 57.2% | 15.0 pts (96,987 votes) | 645,469 | -1.6 pts | 12.6 pts more Dem. |
| 2008 | Barack Obama | Democratic | 373,153 | 57.3% | 15.5 pts (100,806 votes) | 651,380 | +0.5 pts | 5.2 pts more Dem. |
| 2012 | Barack Obama | Democratic | 352,687 | 56.7% | 14.6 pts (90,648 votes) | 622,081 | -0.9 pts | 9.3 pts more Dem. |
| 2016 | Hillary Clinton | Democratic | 367,617 | 56.5% | 16.6 pts (108,137 votes) | 650,114 | +2.5 pts | 18.0 pts more Dem. |
| 2020 | Joseph R Biden Jr | Democratic | 429,065 | 59.6% | 20.4 pts (146,741 votes) | 719,733 | +3.4 pts | 19.4 pts more Dem. |
| 2024 | Kamala D Harris | Democratic | 429,916 | 59.7% | 20.3 pts (146,321 votes) | 720,504 | -0.1 pts | 22.2 pts more Dem. |
Population Context
Total Census Bureau population estimate for the county that year, and recorded votes as a share of that total population. This is a population-based figure, not a turnout rate against eligible or registered voters, which this site does not calculate.
| Year | County Population | Votes Cast (% of Population) |
|---|---|---|
| 2000 | 1,279,651 | 45.5% of population |
| 2004 | 1,247,531 | 51.7% of population |
| 2008 | 1,221,071 | 53.3% of population |
| 2012 | 1,230,911 | 50.5% of population |
| 2016 | 1,226,426 | 53.0% of population |
| 2020 | 1,249,671 | 57.6% of population |
| 2024 | 1,231,814 | 58.5% of population |
Trend
Between 2000 and 2024, the two-party presidential margin in Allegheny shifted 3.8 points toward the Democratic candidate, based on recorded county returns. This reflects the vote totals in this dataset only; no claim is made here about the causes of that shift.
Margin Over Time
Democratic candidate's margin (percentage points, two-party vote share). Positive values favor the Democratic candidate; negative values favor the Republican candidate.
Bellwether Status
Allegheny has matched the national popular winner in 3 of the last 7 presidential elections (43%), and Pennsylvania's own statewide winner in 5 of 7 (71%). Compare every county on the bellwether counties page.
Related Pages
Other Pennsylvania Counties
Frequently Asked Questions
How has Allegheny voted in presidential elections since 2000?
Since 2000, Allegheny has voted Democratic in 7 of 7 recorded presidential elections and Republican in 0 of 7, based on county-level returns through 2024.
What was the closest presidential election in Allegheny?
Allegheny's closest recorded margin was in 2012, when Barack Obama (Democratic) won by 14.7 points (90,648 votes) out of 622,081 total votes cast.
Has Allegheny ever flipped between parties?
Not in the 2000-2024 record on this page -- Allegheny has voted for the same party in every recorded presidential election in that span.
What is the largest presidential election margin recorded in Allegheny?
The widest margin on record for Allegheny was in 2020, when Joseph R Biden Jr (Democratic) won by 20.6 points.
How many votes were cast in Allegheny relative to its population?
In 2024, 720,504 votes were recorded in Allegheny against a total population of 1,231,814 (58.5% of the total population). This is a population-based figure, not a turnout rate against eligible or registered voters, which this site does not calculate.
Is Allegheny a presidential bellwether county?
Allegheny has matched the national popular winner in 3 of the last 7 presidential elections (43%), and Pennsylvania's own statewide winner in 5 of 7 (71%).