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

| County | Obama | Votes_2 | Romney | Votes_4 | Others_ | Votes_6 | Total_ |
|---|---|---|---|---|---|---|---|
| San Joaquin | 55.6% | 114121 | 41.9% | 86071 | 2.5% | 5172 | 205364 |
| San Luis Obispo | 48.6% | 61258 | 47.6% | 59967 | 3.8% | 4741 | 125966 |
| San Mateo | 72.1% | 206087 | 25.4% | 72756 | 2.5% | 6878 | 285721 |
| Santa Barbara | 57.4% | 94129 | 39.4% | 64606 | 3.2% | 5150 | 163885 |
| Santa Clara | 70.2% | 450818 | 27.2% | 174843 | 2.6% | 16290 | 641951 |
| Santa Cruz | 75.4% | 90805 | 20.0% | 24047 | 4.6% | 5533 | 120385 |
| Shasta | 33.8% | 25819 | 62.8% | 48067 | 3.4% | 2615 | 76501 |
| Sierra | 36.3% | 652 | 58.7% | 1056 | 5.0% | 90 | 1798 |
| Siskiyou | 40.2% | 8044 | 55.4% | 11076 | 4.4% | 870 | 19990 |
| Solano | 63.3% | 96783 | 34.1% | 52092 | 2.6% | 3965 | 152840 |
| Sonoma | 71.0% | 153942 | 25.3% | 54784 | 3.2% | 8139 | 216865 |
| Stanislaus | 49.9% | 77724 | 47.1% | 73459 | 3.0% | 4633 | 155816 |