About California Zip Codes
What this site is
California Zip Codes is a free reference for all 2,710 ZIP codes in California, from 90001 in South Los Angeles to 96162 in Truckee, organized by the state's 58 counties and 1,174 USPS city names. Each ZIP code page brings together the figures people most often need in one place: population and density, median household income, median home value and rent, owner-occupancy, poverty rate, educational attainment and unemployment, all from the U.S. Census Bureau, plus ZIP type, area code, coordinates and the nearby ZIPs. City and county pages roll those figures up for their own ZIPs, and our statewide reports analyze them across the whole dataset.
Who it is for
People moving within or to California who need to compare areas before a housing search; residents weighing one town against another; real estate, lending and insurance professionals who need a quick, sourced figure; journalists, planners and students researching how the state's regions differ. Every number is meant to be readable on a phone and citable in a report.
Who writes it
The site is compiled and maintained by the California Zip Codes Data Team, a small group of data analysts and local-market researchers who turn federal datasets into ZIP-level profiles. The Census figures are pulled directly from published American Community Survey tables; the descriptions, FAQs, affordability profiles and reports are generated by the team from those figures and reviewed before publication. We do not accept sponsored rankings, paid placements or real-estate referral fees, and no advertiser has any say in what a page says. When we describe a ZIP as affordable, dense or high-poverty, the numbers behind that description are on the same page.
Where the data comes from
- U.S. Census Bureau — American Community Survey (ACS) 5-Year Estimates at the ZIP Code Tabulation Area level: population, age, income, home value, rent, tenure, poverty, education, unemployment, land and water area.
- United States Postal Service — ZIP code definitions, USPS city names and ZIP type (standard delivery, PO Box, unique).
- Public geographic data — coordinates, county assignment, area codes and time zone.
1,558 of the 2,710 ZIPs have published Census population, income and housing figures; the rest are PO Box, unique or institutional ZIPs, and their pages say so instead of showing zeros. The full account of sources, formulas, known limitations and update schedule is on the methodology page.
Original research
Beyond the per-ZIP profiles, the team publishes statewide analysis built from the same dataset. The current report is the California ZIP Code Affordability Report 2026, which ranks every ZIP with housing data on price-to-income and rent-to-income, compares the state's regions and all 58 counties, explains the Census $2 million home-value and $250,000 income caps, and screens for the ZIPs where a median income still buys the median home.
How the site stays free
There is no paywall, signup wall or email gate. The site is supported by lightweight display advertising, which never influences content. See the privacy policy for how advertising cookies are used.
Corrections
If a figure does not match its Census source, or a city or county assignment, ZIP type or nearby-ZIP list is wrong, we want to know. The methodology page explains how each figure was derived so you can check our work; substantive corrections are noted on the affected page when they are made. Most recent correction: September 2026, ZIP 95467 was listed under a numeric city name and is now correctly shown as Hidden Valley Lake, Lake County.