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Zip Code 94963 — San Geronimo, CA

94963 is a ZIP Code associated with San Geronimo, CA, located within Marin. 94963 ranks #22 out of 29 ZIP codes in Marin County by population (and #1471 out of 1,802 in CA). The area supports an estimated population of 739 residents across Data Pending housing units, with a population density of 178.7 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (38.007650, -122.664840)

Data MetricLocal Statistic
Postal / Zip Code94963
Primary CitySan Geronimo
State / ProvinceCA
CountyMarin
Total Population739
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density178.7 people/sq mi
TimezoneAmerica/Los_Angeles

How 94963 Compares

MetricZIP 94963Marin CountyCA State Average
Population739290,846 (Total)39,286,245 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density178.7 /sq mi----
County Pop Rank#22 of 29----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 94973Woodacre1.4 mi1,689N/A
Zip 94933Forest Knolls1.4 mi1,033N/A
Zip 94938Lagunitas3.9 mi437N/A
Zip 94930Fairfax3.9 mi8,406N/A
Zip 94946Nicasio4.6 mi715N/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 →