Calhoun -- U.S. County in Arkansas Population (2000): 5744 Housing Units (2000): 3012 Land area (2000): 628.274441 sq. miles (1627.223264 sq. km) Water area (2000): 4.266463 sq. miles (11.050088 sq. km) Total area (2000): 632.540904 sq. miles (1638.273352 sq. km) Located within: Arkansas (AR), FIPS 05 Location: 33.595502 N, 92.510135 W Headwords: Calhoun Calhoun, AR Calhoun County Calhoun County, AR