Yankton County, South Dakota
Votes
Percentages
| Year | Democrat | Republican | Other | Total | |||
|---|---|---|---|---|---|---|---|
| 2000 | 3,596 | 41.1% | 4,904 | 56.1% | 240 | 2.7% | 8,740 |
| 2004 | 4,237 | 40.6% | 6,003 | 57.5% | 191 | 1.8% | 10,431 |
| 2008 | 4,838 | 48.5% | 5,039 | 50.6% | 90 | 0.9% | 9,967 |
| 2012 | 4,226 | 42.4% | 5,495 | 55.1% | 253 | 2.5% | 9,974 |
| 2016 | 3,301 | 34.3% | 5,659 | 58.8% | 663 | 6.9% | 9,623 |
| 2020 | 4,016 | 36.8% | 6,581 | 60.4% | 303 | 2.8% | 10,900 |