Tarkio, MO -- U.S. city in Missouri Population (2000): 1935 Housing Units (2000): 843 Land area (2000): 1.384229 sq. miles (3.585136 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.384229 sq. miles (3.585136 sq. km) FIPS code: 72340 Located within: Missouri (MO), FIPS 29 Location: 40.441185 N, 95.382715 W ZIP Codes (1990): 64491 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Tarkio, MO Tarkio