United States presidential election in California, 2012 General election By county

| County | Obama | Votes_2 | Romney | Votes_4 | Others_ | Votes_6 | Total_ |
|---|---|---|---|---|---|---|---|
| Alameda | 78.7% | 469684 | 18.1% | 108182 | 3.2% | 19027 | 596893 |
| Alpine | 59.5% | 389 | 36.1% | 236 | 4.4% | 29 | 654 |
| Amador | 38.6% | 6830 | 58.1% | 10281 | 3.3% | 582 | 17693 |
| Butte | 46.9% | 42669 | 48.9% | 44479 | 4.2% | 3873 | 91021 |
| Calaveras | 39.7% | 8670 | 56.5% | 12365 | 3.8% | 827 | 21862 |
| Colusa | 38.3% | 2314 | 59.6% | 3601 | 2.1% | 130 | 6045 |
| Contra Costa | 66.2% | 290824 | 31.1% | 136517 | 2.7% | 11804 | 439145 |
| Del Norte | 43.4% | 3791 | 52.8% | 4614 | 3.8% | 331 | 8736 |
| El Dorado | 39.5% | 35166 | 57.3% | 50973 | 3.2% | 2859 | 88998 |
| Fresno | 49.7% | 129129 | 47.9% | 124490 | 1.8% | 6078 | 259697 |
| Glenn | 35.9% | 3301 | 61.3% | 5632 | 2.8% | 258 | 9191 |
| Humboldt | 59.7% | 34457 | 32.6% | 18825 | 7.7% | 4404 | 57686 |