City and County Codes
These city and county codes are used by the State of California in their vital indexes (California Birth Index, California Death Index, and California Marriage Index).
COUNTY
| 01 Alameda | 11 Glenn | 21 Marin | 31 Placer | 41 San Mateo | 51 Sutter |
| 02 Alpine | 12 Humboldt | 22 Mariposa | 32 Plumas | 42 Santa Barbara | 52 Tehama |
| 03 Amador | 13 Imperial | 23 Mendocino | 33 Riverside | 43 Santa Clara | 53 Trinity |
| 04 Butte | 14 Inyo | 24 Merced | 34 Sacramento | 44 Santa Cruz | 54 Tulare |
| 05 Calaveras | 15 Kern | 25 Modoc | 35 San Benito | 45 Shasta | 55 Tuolomne |
| 06 Colusa | 16 Kings | 26 Mono | 36 San Bernadino | 46 Sierra | 56 Ventura |
| 07 Contra Costa | 17 Lake | 27 Monterey | 37 San Diego | 47 Siskiyou | 57 Yolo |
| 08 Del Norte | 18 Lassen | 28 Napa | 38 San Francisco | 48 Solano | 58 Yuba |
| 09 El Dorado | 19 Los Angeles | 29 Nevada | 39 San Joaquin | 49 Sonoma | |
| 10 Fresno | 20 Madera | 30 Orange | 40 San Luis Obispso | 50 Stanislaus |
CITY
| 60 Alameda | 70 Los Angeles | 80 San Diego | 90 San Francisco |
Example:

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