Find the last 4 digits (ZIP+4) for an address in 94309

ZIP 94309, Palo Alto, CA is filled in. Just type the street address.

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ZIP Code 94309 – Palo Alto, CA

Palo Alto, California · Santa Clara County · Pacific time

ZIP code94309
CityPalo Alto
StateCalifornia
CountySanta Clara County
PopulationNot published (no Census ZIP area)
Time zonePacific · local time
ZIP typePO box or unique ZIP (no Census area)
Center (lat, long)37.4419, -122.1430

Area codes in this area

650

These are the area codes that most often serve ZIP 94309 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

94302 Palo Alto · 0 mi94301 Palo Alto · 0.4 mi94303 Palo Alto · 1.9 mi94306 Palo Alto · 1.9 mi94305 Stanford · 2.2 mi94025 Menlo Park · 2.2 mi94027 Atherton · 3.3 mi94304 Palo Alto · 3.3 mi

About ZIP 94309

ZIP code 94309 is assigned to Palo Alto, California. It lies in Santa Clara County. It is a PO-box-only or single-address ZIP, so the Census Bureau does not publish an area for it; the location shown is approximate. The closest neighboring ZIP is 94302 (Palo Alto), about 0 miles away.

Every address in 94309 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources