California ZIP codes
California holds 2,593 ZIP codes between 90001 and 96162. The tables rank the places and counties with the most codes; the guide below decodes the numbering.
Places with the most ZIP codes in California
| Place | ZIP codes |
|---|---|
| Sacramento | 100 |
| Los Angeles | 94 |
| San Diego | 76 |
| Fresno | 58 |
| San Jose | 58 |
| San Francisco | 51 |
| Long Beach | 27 |
| Oakland | 26 |
| Pasadena | 25 |
| Bakersfield | 22 |
| Stockton | 20 |
| Anaheim | 17 |
| Riverside | 17 |
| Santa Barbara | 17 |
| San Bernardino | 15 |
| Glendale | 14 |
| Van Nuys | 13 |
| Burbank | 13 |
| Irvine | 13 |
| Inglewood | 12 |
California counties by ZIP count
| County | ZIP codes |
|---|---|
| Los Angeles | 508 |
| San Diego | 182 |
| Orange | 146 |
| Sacramento | 132 |
| San Bernardino | 116 |
| Santa Clara | 109 |
| Riverside | 99 |
| Fresno | 98 |
| Alameda | 69 |
| Kern | 67 |
Reading a California ZIP code
California holds 2,593 ZIP codes between 90001 and 96162, spread over 58 counties. Sacramento leads the state with 100 codes, ahead of Los Angeles with 94. Every code here opens with the digit 9: that opening number is the national postal region California belongs to, the next two digits name the sectional center that sorts the mail, and the final two point to the local office. A ZIP+4 suffix narrows delivery to a block face. Boundaries follow carrier routes rather than city limits, which is why Sacramento spreads across 100 codes while some rural codes cross county lines.
Source: GeoNames postal dataset (CC BY 4.0), snapshot of 2026-07-09. Counts cover standard delivery ZIPs listed for California; unique and PO box codes may add to these totals.
Last updated: · Methodology and sources