The graph below ranks each California County by total residents according to the 2006 census estimates.
California total population by county
| County | Total Population |
| Los Angeles |  9,948,081 |
| Orange | 3,002,048 |
| San Diego | 2,941,454 |
| Riverside | 2,026,803 |
| San Bernardino | 1,999,332 |
| Santa Clara | 1,731,281 |
| Alameda | 1,457,426 |
| Sacramento | 1,374,724 |
| Contra Costa | 1,024,319 |
| Fresno | 891,756 |
| Ventura | 799,720 |
| Kern | 780,117 |
| San Francisco | 744,041 |
| San Mateo | 705,499 |
| San Joaquin | 673,170 |
| Stanislaus | 512,138 |
| Sonoma | 466,891 |
| Tulare | 419,909 |
| Solano | 411,680 |
| Monterey | 410,206 |
| Santa Barbara | 400,335 |
| Placer | 326,242 |
| San Luis Obispo | 257,005 |
| Santa Cruz | 249,705 |
| Marin | 248,742 |
| Merced | 245,658 |
| Butte | 215,881 |
| Yolo | 188,085 |
| Shasta | 179,951 |
| El Dorado | 178,066 |
| Imperial | 160,301 |
| Madera | 146,345 |
| Kings | 146,153 |
| Napa | 133,522 |
| Humboldt | 128,330 |
| Nevada | 98,764 |
| Sutter | 91,410 |
| Mendocino | 88,109 |
| Yuba | 70,396 |
| Lake | 65,933 |
| Tehama | 61,686 |
| Tuolumne | 56,855 |
| San Benito | 55,842 |
| Calaveras | 47,722 |
| Siskiyou | 45,091 |
| Amador | 38,941 |
| Lassen | 34,715 |
| Del Norte | 28,893 |
| Glenn | 28,061 |
| Colusa | 21,272 |
| Plumas | 21,263 |
| Mariposa | 18,401 |
| Inyo | 17,980 |
| Trinity | 14,313 |
| Mono | 12,754 |
| Modoc | 9,597 |
| Sierra | 3,455 |
| Alpine | 1,180 |