Find the last 4 digits (ZIP+4) for an address in 94027

ZIP 94027, Atherton, CA is filled in. Just type the street address.

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ZIP Code 94027 – Atherton, CA

Atherton, California · San Mateo County · Pacific time

ZIP code94027
CityAtherton
StateCalifornia
CountySan Mateo County
Population7,002
Time zonePacific · local time
ZIP typeStandard (has a Census ZCTA area)
Land area5.03 sq mi
Center (lat, long)37.4571, -122.2011

Area codes in this area

650

These are the area codes that most often serve ZIP 94027 (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

94025 Menlo Park · 1.1 mi94061 Redwood City · 2 mi94063 Redwood City · 2.5 mi94301 Palo Alto · 2.9 mi94305 Stanford · 3.1 mi94302 Palo Alto · 3.3 mi94309 Palo Alto · 3.3 mi94304 Palo Alto · 4.5 mi

About ZIP 94027

ZIP code 94027 is assigned to Atherton, California. It lies in San Mateo County. Its Census area covers about 5.03 square miles of land. The closest neighboring ZIP is 94025 (Menlo Park), about 1.1 miles away.

Every address in 94027 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