Castro Valley, CA ZIP Codes

Total ZIPs

56,663

Total Population

ZIP Codes in Castro Valley, CA

ZIP Code	Population	Density	Timezone
94546	42,209	1,708	America/Los_Angeles
94552	14,454	124	America/Los_Angeles

All data sourced from the U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2023).

PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.