Home > CA > Alameda County > Castro Valley > Zip 94546

Zip Code 94546 — Castro Valley, CA

94546 is a ZIP Code associated with Castro Valley, CA, located within Alameda. The postal region supports an estimated population of 44,855 residents across Data Pending housing units, with a population density of 1,085.3 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (37.734410, -122.090560)

Data MetricLocal Statistic
Postal / Zip Code94546
Primary CityCastro Valley
State / ProvinceCA
CountyAlameda
Total Population44,855
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density1,085.3 people/sq mi
TimezoneAmerica/Los_Angeles

How 94546 Compares

MetricZIP 94546Alameda CountyCA State Average
Population44,8551,668,63539,286,245
Median IncomeData PendingN/AN/A
Population Density1,085.3 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 94578San Leandro2.7 mi41,769N/A
Zip 94605Oakland3.7 mi44,103N/A
Zip 94541Hayward4.2 mi67,139N/A
Zip 94577San Leandro4.3 mi46,317N/A
Zip 94580San Lorenzo4.5 mi29,420N/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 →