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County Codes

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

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