Harrisburg, MO -- U.S. town in Missouri Population (2000): 184 Housing Units (2000): 86 Land area (2000): 0.692602 sq. miles (1.793832 sq. km) Water area (2000): 0.001789 sq. miles (0.004633 sq. km) Total area (2000): 0.694391 sq. miles (1.798465 sq. km) FIPS code: 30484 Located within: Missouri (MO), FIPS 29 Location: 39.142279 N, 92.461207 W ZIP Codes (1990): 65256 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Harrisburg, MO Harrisburg