The J.W. Garner Building is a historic building located in Ottumwa, Iowa, United States. Built in 1911, it is the work of local architect George M. Kerns. The three-story red brick structure with limestone details exhibits a subdued Neoclassical style. The windows on the second floor are grouped into bays divided by brick pilasters with two windows per bay.^[2] The third floor windows have no such division and have a limestone belt course for their sills. There is a simple cornice near the top of the facade. The building was individually listed on the National Register of Historic Places in 2010.^[1] In 2016 it was included as a contributing property in the Greater Second Street Historic District.^[2]