Liberal, KS -- U.S. city in Kansas Population (2000): 19666 Housing Units (2000): 7014 Land area (2000): 11.058466 sq. miles (28.641294 sq. km) Water area (2000): 0.138334 sq. miles (0.358283 sq. km) Total area (2000): 11.196800 sq. miles (28.999577 sq. km) FIPS code: 39825 Located within: Kansas (KS), FIPS 20 Location: 37.043418 N, 100.928133 W ZIP Codes (1990): 67901 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Liberal, KS Liberal