Rock Island County, Illinois
Votes
Percentages
| Year | Democrat | Republican | Other | Total | |||
|---|---|---|---|---|---|---|---|
| 2000 | 37,957 | 58.3% | 25,194 | 38.7% | 1,944 | 3.0% | 65,095 |
| 2004 | 39,880 | 57.0% | 29,663 | 42.4% | 429 | 0.6% | 69,972 |
| 2008 | 42,210 | 61.7% | 25,364 | 37.1% | 827 | 1.2% | 68,401 |
| 2012 | 39,157 | 60.2% | 24,934 | 38.4% | 925 | 1.4% | 65,016 |
| 2016 | 32,298 | 50.5% | 26,998 | 42.2% | 4,698 | 7.3% | 63,994 |
| 2020 | 36,691 | 55.0% | 28,603 | 42.8% | 1,464 | 2.2% | 66,758 |