Hardtner, KS -- U.S. city in Kansas Population (2000): 199 Housing Units (2000): 126 Land area (2000): 0.298373 sq. miles (0.772783 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.298373 sq. miles (0.772783 sq. km) FIPS code: 30000 Located within: Kansas (KS), FIPS 20 Location: 37.013263 N, 98.648775 W ZIP Codes (1990): 67057 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Hardtner, KS Hardtner