Mercer County, Pennsylvania
Votes
Percentages
| Year | Democrat | Republican | Other | Total | |||
|---|---|---|---|---|---|---|---|
| 2000 | 23,817 | 48.9% | 23,132 | 47.5% | 1,776 | 3.6% | 48,725 |
| 2004 | 24,831 | 48.2% | 26,311 | 51.0% | 422 | 0.8% | 51,564 |
| 2008 | 26,411 | 49.1% | 26,565 | 49.4% | 820 | 1.5% | 53,796 |
| 2012 | 24,232 | 47.6% | 25,925 | 51.0% | 706 | 1.4% | 50,863 |
| 2016 | 18,733 | 35.8% | 31,544 | 60.3% | 2,032 | 3.9% | 52,309 |
| 2020 | 21,067 | 36.4% | 36,143 | 62.4% | 744 | 1.3% | 57,954 |