The Kinney Octagon Barn was a historic agricultural building located just north of Burr Oak, Iowa, United States.

Lorenzo Coffin was a stock breeder and the farm editor of the Fort Dodge Messenger.

He is thought to have built the first round barn in Iowa in 1867.

It was added to the National Register of Historic Places on November 19, 1986.

This article about a property in Winneshiek County, Iowa on the National Register of Historic Places is a stub.