Pilot Knob, MO -- U.S. city in Missouri Population (2000): 697 Housing Units (2000): 326 Land area (2000): 0.867271 sq. miles (2.246222 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.867271 sq. miles (2.246222 sq. km) FIPS code: 57656 Located within: Missouri (MO), FIPS 29 Location: 37.623573 N, 90.643696 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Pilot Knob, MO Pilot Knob