Find the last 4 digits (ZIP+4) for an address in 94303

ZIP 94303, Palo Alto, CA is filled in. Just type the street address.

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ZIP Code 94303 – Palo Alto, CA

Palo Alto, California · Santa Clara County · Pacific time

ZIP code94303
CityPalo Alto
StateCalifornia
CountySanta Clara CountySan Mateo County
Population46,879
Time zonePacific · local time
ZIP typeStandard (has a Census ZCTA area)
Land area8.44 sq mi
Center (lat, long)37.4579, -122.1151

Area codes in this area

650

These are the area codes that most often serve ZIP 94303 (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 · 1.9 mi94309 Palo Alto · 1.9 mi94301 Palo Alto · 2.1 mi94306 Palo Alto · 3 mi94025 Menlo Park · 3.7 mi94043 Mountain View · 4.1 mi94305 Stanford · 4.1 mi94027 Atherton · 4.7 mi

About ZIP 94303

ZIP code 94303 is assigned to Palo Alto, California. It crosses 2 counties; most of its land is in Santa Clara County. Its Census area covers about 8.44 square miles of land. The closest neighboring ZIP is 94302 (Palo Alto), about 1.9 miles away.

Every address in 94303 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