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Castro Valley

  1. Castro Valley, California, United States [CDP]; population was 48,619 in 1990; housing units was 19,682 in 1990; location is 3743'N 1224'W; land area is 13.26 square miles (8,486 acres); water area is 0.10 square miles (66 acres); FIPS code is 11964 [SourceCBP]
  2. Castro Valley, California, United States [Populated Place] is in Alameda County; location is 3741'39"N 1225'7"W [SourceGSP]
  3. Hayward, California, United States Postal Service Zip Code is 94546 (Castro Valley) [SourcePSZ]

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