Great site is the norcal index, which is where I got these. My cut and paste came out in odd order. The original is under contents/vital records at: http://homepages.rootsweb.com/~yvonne/NORCAL%20index/#MEMBER COUNTY CODES FOR THE CALIFORNIA DEATH INDEX (CADI) 01 Alameda 21 Marin 41 San Mateo 02 Alpine 22 Mariposa 42 Santa Barbara 03 Amador 23 Mendocino 43 Santa Clara 04 Butte 24 Merced 44 Santa Cruz 05 Calaveras 25 Modoc 45 Shasta 06 Colusa 26 Mono 46 Sierra 07 Contra Costa 27 Monterey 47 Siskiyou 08 Del Norte 28 Napa 48 Solano 09 El Dorado 29 Nevada 49 Sonoma 10 Fresno 30 Orange 50 Stanislaus 11 Glenn 31 Placer 51 Sutter 12 Humboldt 32 Plumas 52 Tehama 13 Imperial 33 Riverside 53 Trinity 14 Inyo 34 Sacramento 54 Tulare 15 Kern 35 San Benito 55 Tuolomne 16 Kings 36 San Bernadino 56 Ventura 17 Lake 37 San Diego 57 Yolo 18 Lassen 38 San Francisco 58 Yuba 19 Los Angeles 39 San Joaquin 20 Madera 40 San Luis Obispo CITIES 60 Alameda 80 San Diego 70 Los Angeles 90 San Francisco