Butler County, Pennsylvania
Votes
Percentages
| Year | Democrat | Republican | Other | Total | |||
|---|---|---|---|---|---|---|---|
| 2000 | 25,037 | 35.4% | 44,009 | 62.1% | 1,778 | 2.5% | 70,824 |
| 2004 | 30,090 | 35.2% | 54,959 | 64.3% | 376 | 0.4% | 85,425 |
| 2008 | 32,260 | 35.7% | 57,074 | 63.2% | 1,021 | 1.1% | 90,355 |
| 2012 | 28,550 | 31.9% | 59,761 | 66.8% | 1,134 | 1.3% | 89,445 |
| 2016 | 28,584 | 29.4% | 64,428 | 66.4% | 4,059 | 4.2% | 97,071 |
| 2020 | 37,508 | 33.1% | 74,359 | 65.6% | 1,438 | 1.3% | 113,305 |