Treynor, IA -- U.S. city in Iowa Population (2000): 950 Housing Units (2000): 373 Land area (2000): 0.586388 sq. miles (1.518739 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.586388 sq. miles (1.518739 sq. km) FIPS code: 78825 Located within: Iowa (IA), FIPS 19 Location: 41.231042 N, 95.606648 W ZIP Codes (1990): 51575 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Treynor, IA Treynor