Sumner -- U.S. County in Kansas Population (2000): 25946 Housing Units (2000): 10877 Land area (2000): 1181.806245 sq. miles (3060.863993 sq. km) Water area (2000): 2.977984 sq. miles (7.712942 sq. km) Total area (2000): 1184.784229 sq. miles (3068.576935 sq. km) Located within: Kansas (KS), FIPS 20 Location: 37.264610 N, 97.432563 W Headwords: Sumner Sumner, KS Sumner County Sumner County, KS