Home > CA > Contra Costa County > San Ramon > Zip 94583

Zip Code 94583 — San Ramon, CA

ZIP Code 94583 is associated with San Ramon, CA, in Contra Costa County. The listed population estimate is 39,583; estimated density is 719.7 people per square mile. Among records with population estimates, it ranks #11 of 43 in Contra Costa County and #390 of 1,762 in CA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (37.772450, -121.991570)

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

How 94583 Compares

MetricZIP 94583Contra Costa County recordsCA records
Population estimate39,5831,171,369 (sum)39,286,245 (sum)
Population Density719.7 /sq mi----
County population rank#11 of 43----
State population rank#390 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 94526Danville2.9 mi32,584
ZIP 94582San Ramon4.2 mi47,424
ZIP 94552Castro Valley4.8 mi14,506
ZIP 94528Diablo5.1 mi1,049
ZIP 94506Danville5.3 mi27,055

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 →