Calhoun -- U.S. County in Texas Population (2000): 20647 Housing Units (2000): 10238 Land area (2000): 512.314332 sq. miles (1326.887971 sq. km) Water area (2000): 519.841744 sq. miles (1346.383879 sq. km) Total area (2000): 1032.156076 sq. miles (2673.271850 sq. km) Located within: Texas (TX), FIPS 48 Location: 28.536332 N, 96.620489 W Headwords: Calhoun Calhoun, TX Calhoun County Calhoun County, TX