Home > CA > Alameda County > San Leandro > Zip 94578

Zip Code 94578 — San Leandro, CA

ZIP Code 94578 is associated with San Leandro, CA, in Alameda County. The listed population estimate is 41,769; estimated density is 3,537.7 people per square mile. Among records with population estimates, it ranks #16 of 49 in Alameda County and #354 of 1,762 in CA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (37.706750, -122.125600)

Data MetricLocal Statistic
Postal / Zip Code94578
Primary CitySan Leandro
State / ProvinceCA
CountyAlameda
Total Population41,769
Population Density3,537.7 people/sq mi
TimezoneAmerica/Los_Angeles

How 94578 Compares

MetricZIP 94578Alameda County recordsCA records
Population estimate41,7691,668,635 (sum)39,286,245 (sum)
Population Density3,537.7 /sq mi----
County population rank#16 of 49----
State population rank#354 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 94580San Lorenzo2.0 mi29,420
ZIP 94579San Leandro2.2 mi20,017
ZIP 94577San Leandro2.3 mi46,317
ZIP 94546Castro Valley2.7 mi44,855
ZIP 94541Hayward3.1 mi67,139

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 →