Polk -- U.S. County in Tennessee Population (2000): 16050 Housing Units (2000): 7369 Land area (2000): 435.054338 sq. miles (1126.785516 sq. km) Water area (2000): 7.299238 sq. miles (18.904940 sq. km) Total area (2000): 442.353576 sq. miles (1145.690456 sq. km) Located within: Tennessee (TN), FIPS 47 Location: 35.110672 N, 84.542893 W Headwords: Polk Polk, TN Polk County Polk County, TN