ZIP Code 92331 — Fontana, California
📍 ZIP code 92331 is in Fontana, San Bernardino County, California.
ZIP code 92331 is a PO Box ZIP code assigned by the U.S. Postal Service in Fontana, San Bernardino County, California. It serves post office boxes at a Fontana post office rather than street addresses, which is why the Census Bureau reports no resident population, income or housing figures for it. Mail addressed to 92331 is handled in the Pacific Time Zone and the local area code is 909. The demographic profile of the surrounding community is on the standard delivery ZIP pages for Fontana listed below.
Why there are no demographics for 92331
The Census Bureau publishes demographics for ZIP Code Tabulation Areas (ZCTAs), which are built from populated census blocks. A PO Box ZIP like 92331 has no delivery territory of its own, so there is no ZCTA and no population, income, housing or education estimate to report. This is normal: San Bernardino County and the rest of California have hundreds of PO Box and unique ZIPs of this kind.
For the community around Fontana, use the delivery ZIPs that do carry Census data:
How ZIPs and ZCTAs differ is explained on the methodology page.
Nearby Zip Codes
Cities & Places Served
ZIP code 92331 primarily serves Fontana in San Bernardino County, California.