Plains, KS -- U.S. city in Kansas Population (2000): 1163 Housing Units (2000): 453 Land area (2000): 0.989150 sq. miles (2.561886 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.989150 sq. miles (2.561886 sq. km) FIPS code: 56100 Located within: Kansas (KS), FIPS 20 Location: 37.262633 N, 100.591681 W ZIP Codes (1990): 67869 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Plains, KS Plains