Harlan, IA -- U.S. city in Iowa Population (2000): 5282 Housing Units (2000): 2306 Land area (2000): 4.365960 sq. miles (11.307783 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 4.365960 sq. miles (11.307783 sq. km) FIPS code: 34500 Located within: Iowa (IA), FIPS 19 Location: 41.654609 N, 95.322019 W ZIP Codes (1990): 51537 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Harlan, IA Harlan