Allegheny County, Pennsylvania
Votes
Percentages
| Year | Democrat | Republican | Other | Total | |||
|---|---|---|---|---|---|---|---|
| 2000 | 329,963 | 56.6% | 235,361 | 40.4% | 17,154 | 2.9% | 582,478 |
| 2004 | 368,912 | 57.2% | 271,925 | 42.1% | 4,632 | 0.7% | 645,469 |
| 2008 | 373,153 | 57.3% | 272,347 | 41.8% | 5,880 | 0.9% | 651,380 |
| 2012 | 352,687 | 56.7% | 262,039 | 42.1% | 7,355 | 1.2% | 622,081 |
| 2016 | 367,617 | 56.5% | 259,480 | 39.9% | 23,017 | 3.5% | 650,114 |
| 2020 | 429,065 | 59.6% | 282,324 | 39.2% | 8,344 | 1.2% | 719,733 |