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Zip Code 94404 — San Mateo, CA

94404 is a ZIP Code associated with San Mateo, CA, located within San Mateo. The postal region supports an estimated population of 35,881 residents across Data Pending housing units, with a population density of 3,184.8 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (37.556200, -122.269050)

Data MetricLocal Statistic
Postal / Zip Code94404
Primary CitySan Mateo
State / ProvinceCA
CountySan Mateo
Total Population35,881
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density3,184.8 people/sq mi
TimezoneAmerica/Los_Angeles

How 94404 Compares

MetricZIP 94404San Mateo CountyCA State Average
Population35,881713,10939,286,245
Median IncomeData PendingN/AN/A
Population Density3,184.8 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 94065Redwood City1.9 mi11,673N/A
Zip 94403San Mateo2.3 mi43,276N/A
Zip 94401San Mateo3.0 mi35,295N/A
Zip 94002Belmont3.4 mi27,534N/A
Zip 94402San Mateo3.7 mi25,475N/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 →