Castro -- U.S. County in Texas Population (2000): 8285 Housing Units (2000): 3198 Land area (2000): 898.314009 sq. miles (2326.622504 sq. km) Water area (2000): 1.004344 sq. miles (2.601240 sq. km) Total area (2000): 899.318353 sq. miles (2329.223744 sq. km) Located within: Texas (TX), FIPS 48 Location: 34.529907 N, 102.282176 W Headwords: Castro Castro, TX Castro County Castro County, TX