California ZIP codes

All 2,593 ZIPs in California, 90001 to 96162. Tap one on the map or in the list.

2,593

ZIP codes

39,286,245

people live in them

counties

791

PO Box & no-area ZIPs

Most people

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All 2,593 California ZIP codes

ZIP codes by county

Pick a county for its ZIP list and map. Counts include ZIPs that only partly reach into the county.

Questions people actually ask

How many ZIP codes are in California?

2,593 ZIP codes are in use in California. 1,802 cover a delivery area, and 791 are PO Box, single-building or organization ZIPs with no area of their own.

What do California ZIP codes start with?

California ZIP codes start with these three-digit prefixes: 900–908, 910–928, 930–961. Each prefix is a mail sorting area run from one processing center.

Which California ZIP code has the most people?

92336 in Fontana has the most residents of any California ZIP, about 105,517 people in the Census Bureau’s ACS 2020–2024 estimates.

Which California county has the most ZIP codes?

Los Angeles County touches 519 ZIP codes, the most of the 58 counties in California. 169 California ZIPs reach into more than one county.

Are these the official USPS ZIP code boundaries?

The map uses Census ZIP Code Tabulation Areas, the standard public stand-in for USPS delivery areas. They match for almost every home. For a mailing address, the USPS ZIP Code lookup has the final word.

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Updated 2026-11-10 · Where the data comes from