Home > CA > San Mateo County > Portola Valley > Zip 94028

Zip Code 94028 — Portola Valley, CA

94028 is a ZIP Code associated with Portola Valley, CA, located within San Mateo. The postal region supports an estimated population of 6,531 residents across Data Pending housing units, with a population density of 145.6 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (37.374920, -122.211360)

Data MetricLocal Statistic
Postal / Zip Code94028
Primary CityPortola Valley
State / ProvinceCA
CountySan Mateo
Total Population6,531
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density145.6 people/sq mi
TimezoneAmerica/Los_Angeles

How 94028 Compares

MetricZIP 94028San Mateo CountyCA State Average
Population6,531713,10939,286,245
Median IncomeData PendingN/AN/A
Population Density145.6 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 94304Palo Alto2.9 mi5,000N/A
Zip 94305Stanford3.6 mi18,509N/A
Zip 94022Los Altos3.9 mi20,027N/A
Zip 94306Palo Alto5.3 mi27,183N/A
Zip 94025Menlo Park5.5 mi40,721N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →