Boulder County, Colorado
Votes
Percentages
| Year | Democrat | Republican | Other | Total | |||
|---|---|---|---|---|---|---|---|
| 2000 | 69,983 | 50.1% | 50,873 | 36.4% | 18,770 | 13.4% | 139,626 |
| 2004 | 105,564 | 66.3% | 51,586 | 32.4% | 2,107 | 1.3% | 159,257 |
| 2008 | 124,159 | 72.3% | 44,904 | 26.1% | 2,700 | 1.6% | 171,763 |
| 2012 | 125,091 | 69.7% | 49,981 | 27.8% | 4,427 | 2.5% | 179,499 |
| 2016 | 132,334 | 70.3% | 41,396 | 22.0% | 14,412 | 7.7% | 188,142 |
| 2020 | 159,089 | 77.2% | 42,501 | 20.6% | 4,521 | 2.2% | 206,111 |