Matlock, IA -- U.S. city in Iowa Population (2000): 83 Housing Units (2000): 35 Land area (2000): 0.377905 sq. miles (0.978769 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.377905 sq. miles (0.978769 sq. km) FIPS code: 50385 Located within: Iowa (IA), FIPS 19 Location: 43.242958 N, 95.934486 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Matlock, IA Matlock