Constructed in 1914, the dark red brick Iowa Falls Post Office is one of 31 properties in Hardin County on the National Register of Historic Places. The building stands on a foundation of North Carolina granite and features four marvelous columns 30 inches in diameter and 22 feet high. The 450-square-feet lobby retains much of its original white oak woodwork, marble terrazo floor, and vaulted ceiling. Postal service was first established in Iowa Falls in February 1856.