An octagon barn is a barn built in an octagonal shape, see . As a proper name, Octagon Barn or Octagonal Barn may refer to:

United States

San Luis Obispo Octagon Barn The Pereira Octagon Barn of San Luis Obispo is a historically and culturally important structure located on the southern outskirts of San Luis Obispo, California. It was built in 1906 by Henri LaFranchi (a young Italian-Swiss immigrant and the ow ...

, San Luis Obispo, California * Kinney Octagon Barn, Burr Oak, Iowa, listed on the U.S. NRHP * Secrest Octagon Barn, Downey, Iowa, NRHP * Fobes Octagon Barn, Lanesboro, Iowa, NRHP * Octagon Barn, Otter Township, Milo, Iowa, NRHP * Octagon Barn (Polk Township, Iowa), * Octagon Barn, Richland Township, Iowa, NRHP * Roberts Octagon Barn, Sharon Center, Iowa, NRHP * Grimes Octagon Barn, West Union, Iowa, NRHP * Thumb Octagon Barn, Gagetown, Michigan * Marsh Octagon Barn, NHRP in Wright County, Minnesota * J. F. Roberts Octagonal Barn, Rea, Missouri, NRHP * Octagonal Poultry House, Cold Spring, New Jersey, NRHP * Lattin-Crandall Octagon Barn, Catherine, New York, NRHP *

Lunn-Musser Octagon Barn 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. It measures 60 feet in diame ...

, Garrattsville, New York, NRHP *

Mexico Octagon Barn Mexico Octagon Barn is a historic octagon-shaped barn located at Mexico in Oswego County, New York. It is a wood frame one story structure with a fieldstone foundation built about 1880. ''See also:'' It was listed on the National Register of Hi ...

, Mexico, New York, NRHP *

Baker Octagon Barn Baker Octagon Barn is a historic barn located in Richfield Springs in Otsego County, New York. It was built in 1882, and is a three-story, octagonal wood frame and fieldstone structure. It has a hipped roof and is topped by an octagonal cupola. ...

, Richfield Springs, New York, NRHP *

Rodman Octagonal Barn The Rodman Octagonal Barn near Edgeley, North Dakota was built in about 1890 by Luman B. Rodman. It was listed on the National Register of Historic Places The National Register of Historic Places (NRHP) is the United States federal governm ...

, Edgeley, North Dakota, NRHP *

Gerhardt Octagonal Pig House The Gerhardt Octagonal Pig House near Gladstone, North Dakota, United States, was built in 1930. It was listed on the National Register of Historic Places The National Register of Historic Places (NRHP) is the United States federal governm ...

, Gladstone, North Dakota, NRHP *

Sylvanus Marriage Octagonal Barn The Sylvanus Marriage Octagonal Barn near New Rockford, North Dakota, United States, was built in 1902. It meets the current, practical definition for a round barn. It was listed on the National Register of Historic Places The National Re ...

, New Rockford, North Dakota, NRHP *

James Wimer Octagonal Barn The James Wimer Octagonal Barn is a barn in Lookingglass, Oregon, in the United States. It was built in 1892 and was added to the National Register of Historic Places on December 2, 1985. See also * National Register of Historic Places listings in ...

, Lookingglass, Oregon, NRHP *

Harnsberger Octagonal Barn The Harnsberger Octagonal Barn, also known the Mt. Meridian Octagonal Barn, is located near Grottoes, Virginia. Built about 1867, the barn is possibly the only example of such a barn in Virginia, as the building style was more popular in the expa ...

, Grottoes, Virginia, NRHP *

Rankin Octagonal Barn Rankin Octagonal Barn is a historic octagonal barn located near Silverton, Jackson County, West Virginia. It was built about 1890, and is an eight-sided frame structure covered with vertical wide board siding. Each side of the octagon measures 24 ...

, Silverton, West Virginia, NRHP *

Tim Thering Octagon Barn The Tim Thering Octagon Barn built in 1907 is an historic octagonal barn built by Edgar Carpenter located north of Plain, Wisconsin Wisconsin () is a state in the upper Midwestern United States. Wisconsin is the 25th-largest state by tot ...

, Plain, Wisconsin