ZIP Code 94309 — Palo Alto, California
📍 ZIP code 94309 is in Palo Alto, Santa Clara County, California.
ZIP code 94309 is a PO Box ZIP code assigned by the U.S. Postal Service in Palo Alto, Santa Clara County, California. It serves post office boxes at a Palo Alto 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 94309 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 Palo Alto listed below.
ZIP Code 94309 Map
Coordinates: 37.1894°N, 121.7053°W
Why there are no demographics for 94309
The Census Bureau publishes demographics for ZIP Code Tabulation Areas (ZCTAs), which are built from populated census blocks. A PO Box ZIP like 94309 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 Palo Alto, 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 94309 primarily serves Palo Alto in Santa Clara County, California.