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Castro Valley CA

Castro Valley is a census-designated place in Alameda County, California, United States. At the 2010 census, it was the fifth most populous unincorporated area in California. The population was 66,441 at the 2020 census.

Elevation: 161 ft (49 m)
Country: United States
State: California
County: Alameda
Named for: Don Guillermo Castro
ZIP codes: 94546, 94552, 94541,
Area code(s): 510, 341

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Data from: en.wikipedia.org

Castro Valley CA

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Apartments in Castro Valley | View Updated Specials

Castro Valley Ca | The 10 Best Hotels (2025)