Elk Falls, KS -- U.S. city in Kansas Population (2000): 112 Housing Units (2000): 74 Land area (2000): 0.871267 sq. miles (2.256572 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.871267 sq. miles (2.256572 sq. km) FIPS code: 20300 Located within: Kansas (KS), FIPS 20 Location: 37.371950 N, 96.190115 W ZIP Codes (1990): 67345 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Elk Falls, KS Elk Falls