How to use this list
Counties are sorted alphabetically. Use ZIP count and population to spot larger counties, then open a county for its ZIP roster and income/housing averages.
California counties
58 counties · 1,803 ZIP codes · population 39,241,543 . Select a county to open its ZIP table and local summary.
Related pages
Also see the California overview, cities, rankings, and congressional districts.
| County | ZIP codes | Population | Avg. income |
|---|---|---|---|
| Alameda County | 49 | 1,670,748 | $134,249 |
| Alpine County | 3 | 4,613 | $115,061 |
| Amador County | 11 | 41,024 | $103,811 |
| Butte County | 20 | 209,030 | $72,509 |
| Calaveras County | 18 | 42,959 | $77,404 |
| Colusa County | 7 | 21,941 | $69,555 |
| Contra Costa County | 43 | 1,167,715 | $143,285 |
| Del Norte County | 5 | 27,240 | $61,461 |
| El Dorado County | 23 | 192,322 | $98,751 |
| Fresno County | 55 | 987,457 | $70,772 |
| Glenn County | 7 | 29,582 | $73,098 |
| Humboldt County | 35 | 135,862 | $62,110 |
| Imperial County | 15 | 173,680 | $50,239 |
| Inyo County | 9 | 5,229 | $59,456 |
| Kern County | 47 | 903,338 | $61,896 |
| Kings County | 8 | 151,480 | $61,285 |
| Lake County | 14 | 68,139 | $68,287 |
| Lassen County | 16 | 33,734 | $65,528 |
| Los Angeles County | 295 | 9,847,222 | $96,853 |
| Madera County | 13 | 160,555 | $93,990 |
| Marin County | 29 | 291,236 | $152,107 |
| Mariposa County | 8 | 16,276 | $62,919 |
| Mendocino County | 26 | 90,501 | $62,282 |
| Merced County | 19 | 283,620 | $67,655 |
| Modoc County | 11 | 9,652 | $56,076 |
| Mono County | 8 | 26,582 | $78,035 |
| Monterey County | 31 | 430,564 | $98,525 |
| Napa County | 10 | 129,448 | $113,318 |
| Nevada County | 8 | 96,827 | $86,513 |
| Orange County | 88 | 3,136,556 | $123,774 |
| Placer County | 30 | 416,027 | $114,424 |
| Plumas County | 16 | 18,199 | $68,956 |
| Riverside County | 71 | 2,454,198 | $87,682 |
| Sacramento County | 55 | 1,585,784 | $92,572 |
| San Benito County | 4 | 63,913 | $117,902 |
| San Bernardino County | 91 | 2,178,740 | $78,290 |
| San Diego County | 115 | 3,316,320 | $107,383 |
| San Francisco County | 28 | 836,321 | $144,701 |
| San Joaquin County | 30 | 760,267 | $90,722 |
| San Luis Obispo County | 23 | 276,441 | $91,195 |
| San Mateo County | 30 | 716,065 | $177,543 |
| Santa Barbara County | 24 | 444,243 | $105,789 |
| Santa Clara County | 58 | 1,927,325 | $164,597 |
| Santa Cruz County | 17 | 282,653 | $123,294 |
| Shasta County | 24 | 172,254 | $70,197 |
| Sierra County | 8 | 3,089 | $68,259 |
| Siskiyou County | 21 | 42,931 | $58,695 |
| Solano County | 15 | 449,408 | $102,207 |
| Sonoma County | 38 | 460,034 | $109,369 |
| Stanislaus County | 25 | 555,777 | $79,835 |
| Sutter County | 9 | 98,429 | $80,917 |
| Tehama County | 14 | 72,643 | $64,468 |
| Trinity County | 13 | 15,544 | $51,283 |
| Tulare County | 40 | 501,613 | $63,913 |
| Tuolumne County | 14 | 55,630 | $76,058 |
| Ventura County | 29 | 848,566 | $108,083 |
| Yolo County | 18 | 219,609 | $94,771 |
| Yuba County | 12 | 84,388 | $67,713 |
Frequently asked questions
- How many counties are listed for California?
- US5 currently lists 58 counties with published ZIP coverage in California. Counts can change as geography publishes update.
- What happens when I open a county?
- Each county page shows ZIP totals, income and housing averages, and a ZIP table. From there you can open any ZIP for a full demographics dashboard.