Douglas -- U.S. County in Kansas Population (2000): 99962 Housing Units (2000): 40250 Land area (2000): 456.870426 sq. miles (1183.288922 sq. km) Water area (2000): 17.600484 sq. miles (45.585042 sq. km) Total area (2000): 474.470910 sq. miles (1228.873964 sq. km) Located within: Kansas (KS), FIPS 20 Location: 38.927006 N, 95.256048 W Headwords: Douglas Douglas, KS Douglas County Douglas County, KS