ZIP Code 93423 — Atascadero, California
📍 ZIP code 93423 is in Atascadero, San Luis Obispo County, California.
ZIP code 93423 is a PO Box ZIP code assigned by the U.S. Postal Service in Atascadero, San Luis Obispo County, California. It serves post office boxes at a Atascadero 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 93423 is handled in the Pacific Time Zone and the local area code is 805. The demographic profile of the surrounding community is on the standard delivery ZIP pages for Atascadero listed below.
ZIP Code 93423 Map
Coordinates: 35.4282°N, 120.7695°W
Why there are no demographics for 93423
The Census Bureau publishes demographics for ZIP Code Tabulation Areas (ZCTAs), which are built from populated census blocks. A PO Box ZIP like 93423 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 Luis Obispo County and the rest of California have hundreds of PO Box and unique ZIPs of this kind.
For the community around Atascadero, 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 93423 primarily serves Atascadero in San Luis Obispo County, California.