Waynesville, MO -- U.S. city in Missouri Population (2000): 3507 Housing Units (2000): 1591 Land area (2000): 6.225630 sq. miles (16.124308 sq. km) Water area (2000): 0.014595 sq. miles (0.037800 sq. km) Total area (2000): 6.240225 sq. miles (16.162108 sq. km) FIPS code: 77992 Located within: Missouri (MO), FIPS 29 Location: 37.820218 N, 92.213661 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Waynesville, MO Waynesville