Lunn-Musser Octagon Barn is a historic barn located near Garrattsville in Otsego County, New York.

Built in 1885, it is a two-story, octagonal wood frame and stone structure with a hipped roof and an octagonal cupola.

[2]: 3  and meets the definition of a round barn.

It was added to the National Register of Historic Places in 1984.

This article about a historic property or district in Otsego County, New York, that is listed on the National Register of Historic Places, is a stub.