ZIP Code 94023 — Los Altos, California
📍 ZIP code 94023 is in Los Altos, Santa Clara County, California.
ZIP code 94023 is a PO Box ZIP code assigned by the U.S. Postal Service in Los Altos, Santa Clara County, California. It serves post office boxes at a Los Altos 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 94023 is handled in the Pacific Time Zone and the local area code is 650. The demographic profile of the surrounding community is on the standard delivery ZIP pages for Los Altos listed below.
ZIP Code 94023 Map
Coordinates: 37.1894°N, 121.7053°W
Why there are no demographics for 94023
The Census Bureau publishes demographics for ZIP Code Tabulation Areas (ZCTAs), which are built from populated census blocks. A PO Box ZIP like 94023 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: Santa Clara County and the rest of California have hundreds of PO Box and unique ZIPs of this kind.
For the community around Los Altos, 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 94023 primarily serves Los Altos in Santa Clara County, California.