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Zip Code 91108 — San Marino, CA

91108 is a ZIP Code associated with San Marino, CA, located within Los Angeles. The postal region supports an estimated population of 12,401 residents across Data Pending housing units, with a population density of 1,263.7 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (34.122320, -118.113630)

Data MetricLocal Statistic
Postal / Zip Code91108
Primary CitySan Marino
State / ProvinceCA
CountyLos Angeles
Total Population12,401
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density1,263.7 people/sq mi
TimezoneAmerica/Los_Angeles

How 91108 Compares

MetricZIP 91108Los Angeles CountyCA State Average
Population12,4019,807,50139,286,245
Median IncomeData PendingN/AN/A
Population Density1,263.7 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 91125Pasadena1.2 mi1,000N/A
Zip 91106Pasadena1.4 mi23,910N/A
Zip 91775San Gabriel1.5 mi23,672N/A
Zip 91101Pasadena2.2 mi21,165N/A
Zip 91801Alhambra2.3 mi53,381N/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 →