Find the last 4 digits (ZIP+4) for an address in 94028

ZIP 94028, Portola Valley, CA is filled in. Just type the street address.

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ZIP Code 94028 – Portola Valley, CA

Portola Valley, California · San Mateo County · Pacific time

ZIP code94028
CityPortola Valley
StateCalifornia
CountySan Mateo CountySanta Clara County
Population6,531
Time zonePacific · local time
ZIP typeStandard (has a Census ZCTA area)
Land area17.32 sq mi
Center (lat, long)37.3749, -122.2127

Area codes in this area

650

These are the area codes that most often serve ZIP 94028 (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

94304 Palo Alto · 2.9 mi94305 Stanford · 3.8 mi94022 Los Altos · 4 mi94062 Redwood City · 5.2 mi94306 Palo Alto · 5.3 mi94023 Los Altos · 5.5 mi94025 Menlo Park · 5.5 mi94027 Atherton · 5.7 mi

About ZIP 94028

ZIP code 94028 is assigned to Portola Valley, California. It crosses 2 counties; most of its land is in San Mateo County. Its Census area covers about 17.32 square miles of land. The closest neighboring ZIP is 94304 (Palo Alto), about 2.9 miles away.

Every address in 94028 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