Grainfield, KS -- U.S. city in Kansas Population (2000): 327 Housing Units (2000): 159 Land area (2000): 0.473686 sq. miles (1.226842 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.473686 sq. miles (1.226842 sq. km) FIPS code: 27200 Located within: Kansas (KS), FIPS 20 Location: 39.114101 N, 100.467540 W ZIP Codes (1990): 67737 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Grainfield, KS Grainfield