County Codes
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| County | County Number | County | County Number |
|---|---|---|---|
| Alameda | 01 | Orange | 30 |
| Alpine | 02 | Placer | 31 |
| Amador | 03 | Plumas | 32 |
| Butte | 04 | Riverside | 33 |
| Calaveras | 05 | Sacramento | 34 |
| Colusa | 06 | San Benito | 35 |
| Contra Costa | 07 | San Bernardino | 36 |
| Del Norte | 08 | San Diego | 37 |
| El Dorado | 09 | San Francisco | 38 |
| Fresno | 10 | San Joaquin | 39 |
| Glenn | 11 | San Luis Obispo | 40 |
| Humboldt | 12 | San Mateo | 41 |
| Imperial | 13 | Santa Barbara | 42 |
| Inyo | 14 | Santa Clara | 43 |
| Kern | 15 | Santa Cruz | 44 |
| Kings | 16 | Shasta | 45 |
| Lake | 17 | Sierra | 46 |
| Lassen | 18 | Siskiyou | 47 |
| Los Angeles | 19 | Solano | 48 |
| Madera | 20 | Sonoma | 49 |
| Marin | 21 | Stanislaus | 50 |
| Mariposa | 22 | Sutter | 51 |
| Mendocino | 23 | Tehama | 52 |
| Merced | 24 | Trinity | 53 |
| Modoc | 25 | Tulare | 54 |
| Mono | 26 | Tuolumne | 55 |
| Monterey | 27 | Ventura | 56 |
| Napa | 28 | Yolo | 57 |
| Nevada | 29 | Yuba | 58 |