Millersburg, IA -- U.S. city in Iowa Population (2000): 184 Housing Units (2000): 82 Land area (2000): 0.125736 sq. miles (0.325655 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.125736 sq. miles (0.325655 sq. km) FIPS code: 52230 Located within: Iowa (IA), FIPS 19 Location: 41.572665 N, 92.159332 W ZIP Codes (1990): 52308 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Millersburg, IA Millersburg