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

| County | Obama | Votes_2 | Romney | Votes_4 | Others_ | Votes_6 | Total_ |
|---|---|---|---|---|---|---|---|
| Mono | 52.9% | 2733 | 44.2% | 2285 | 2.9% | 150 | 5168 |
| Monterey | 67.3% | 82918 | 30.3% | 37389 | 2.4% | 2959 | 123266 |
| Napa | 63.1% | 35870 | 34.3% | 19526 | 2.6% | 1457 | 56853 |
| Nevada | 47.7% | 24663 | 48.4% | 24986 | 3.9% | 2026 | 51675 |
| Orange | 45.6% | 512440 | 51.9% | 582332 | 2.5% | 27892 | 1122664 |
| Placer | 38.9% | 66818 | 58.2% | 99921 | 2.9% | 4972 | 171711 |
| Plumas | 39.9% | 4026 | 56.8% | 5721 | 3.3% | 333 | 10080 |
| Riverside | 49.8% | 329063 | 48.2% | 318127 | 2.0% | 13425 | 660615 |
| Sacramento | 58.1% | 300503 | 39.1% | 202514 | 2.8% | 14565 | 517582 |
| San Benito | 59.1% | 11276 | 38.5% | 7343 | 2.4% | 462 | 19081 |
| San Bernardino | 52.6% | 305109 | 45.2% | 262358 | 2.2% | 13136 | 580603 |
| San Diego | 52.7% | 626957 | 45.1% | 536726 | 2.2% | 25288 | 1188971 |
| San Francisco | 83.4% | 301723 | 13.0% | 47076 | 3.4% | 12996 | 361795 |