Crestwood, MO -- U.S. city in Missouri Population (2000): 11863 Housing Units (2000): 5214 Land area (2000): 3.598996 sq. miles (9.321357 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 3.598996 sq. miles (9.321357 sq. km) FIPS code: 17218 Located within: Missouri (MO), FIPS 29 Location: 38.557552 N, 90.376152 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Crestwood, MO Crestwood