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Zip Code 94903 — San Rafael, CA

ZIP Code 94903 is associated with San Rafael, CA, in Marin County. The listed population estimate is 30,615; estimated density is 594.5 people per square mile. Among records with population estimates, it ranks #4 of 29 in Marin County and #597 of 1,762 in CA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (38.024850, -122.552200)

Data MetricLocal Statistic
Postal / Zip Code94903
Primary CitySan Rafael
State / ProvinceCA
CountyMarin
Total Population30,615
Population Density594.5 people/sq mi
TimezoneAmerica/Los_Angeles

How 94903 Compares

MetricZIP 94903Marin County recordsCA records
Population estimate30,615290,846 (sum)39,286,245 (sum)
Population Density594.5 /sq mi----
County population rank#4 of 29----
State population rank#597 of 1,762----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in CA

ZIP CodeCityDistancePopulation estimate
ZIP 94960San Anselmo2.4 mi16,232
ZIP 94949Novato3.0 mi17,787
ZIP 94901San Rafael4.1 mi41,307
ZIP 94957Ross4.3 mi2,321
ZIP 94973Woodacre4.8 mi1,689

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 →