Kirkwood, MO -- U.S. city in Missouri Population (2000): 27324 Housing Units (2000): 12306 Land area (2000): 9.226960 sq. miles (23.897716 sq. km) Water area (2000): 0.049026 sq. miles (0.126978 sq. km) Total area (2000): 9.275986 sq. miles (24.024694 sq. km) FIPS code: 39044 Located within: Missouri (MO), FIPS 29 Location: 38.580652 N, 90.414289 W ZIP Codes (1990): 63122 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Kirkwood, MO Kirkwood