Black Hawk County, Iowa
Votes
Percentages
| Year | Democrat | Republican | Other | Total | |||
|---|---|---|---|---|---|---|---|
| 2000 | 30,112 | 54.7% | 23,468 | 42.6% | 1,505 | 2.7% | 55,085 |
| 2004 | 35,392 | 55.4% | 28,046 | 43.9% | 469 | 0.7% | 63,907 |
| 2008 | 39,184 | 60.5% | 24,662 | 38.1% | 929 | 1.4% | 64,775 |
| 2012 | 39,821 | 59.3% | 26,235 | 39.1% | 1,085 | 1.6% | 67,141 |
| 2016 | 32,233 | 50.0% | 27,476 | 42.7% | 4,696 | 7.3% | 64,405 |
| 2020 | 35,647 | 53.5% | 29,813 | 44.8% | 1,133 | 1.7% | 66,593 |