Laddonia, MO -- U.S. city in Missouri Population (2000): 620 Housing Units (2000): 278 Land area (2000): 0.551725 sq. miles (1.428960 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.551725 sq. miles (1.428960 sq. km) FIPS code: 39602 Located within: Missouri (MO), FIPS 29 Location: 39.240331 N, 91.643501 W ZIP Codes (1990): 63352 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Laddonia, MO Laddonia