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Zip Code 94583 — San Ramon, CA

94583 is a ZIP Code associated with San Ramon, CA, located within Contra Costa. 94583 ranks #11 out of 43 ZIP codes in Contra Costa County by population (and #390 out of 1,802 in CA). The area supports an estimated population of 39,583 residents across Data Pending housing units, with a population density of 719.7 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (37.772450, -121.991570)

Data MetricLocal Statistic
Postal / Zip Code94583
Primary CitySan Ramon
State / ProvinceCA
CountyContra Costa
Total Population39,583
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density719.7 people/sq mi
TimezoneAmerica/Los_Angeles

How 94583 Compares

MetricZIP 94583Contra Costa CountyCA State Average
Population39,5831,171,369 (Total)39,286,245 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density719.7 /sq mi----
County Pop Rank#11 of 43----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 94526Danville2.9 mi32,584N/A
Zip 94582San Ramon4.2 mi47,424N/A
Zip 94552Castro Valley4.8 mi14,506N/A
Zip 94528Diablo5.1 mi1,049N/A
Zip 94506Danville5.3 mi27,055N/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 →