The following codes are used for the counties in the file names of the 
Statewide Database's 2010 Redistricting Data files.

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