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

Tuolomne

55

Monterey

27

Ventura

56

Napa

28

Yolo

57

Nevada

29

Yuba

58

 
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