'Castro Valley, CA' definitions:

Castro Valley, CA -- U.S. Census Designated Place in California

From: Gazetteer 2000
Name :
Castro Valley, CA -- U.S. Census Designated Place in California
Population (2000) :
57292
Housing Units (2000) :
22003
Land area (2000) :
14.425450 sq. miles (37.361743 sq. km)
Water area (2000) :
0.320010 sq. miles (0.828821 sq. km)
Total area (2000) :
14.745460 sq. miles (38.190564 sq. km)
FIPS code :
11964
Located within :
California (CA), FIPS 06
Location :
37.703796 N, 122.079384 W
ZIP Codes (1990) :
94546 94552
Note :
some ZIP codes may be omitted esp. for suburbs.