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. The modified hip roof and heavy timber construction of this barn, built in 1880, suggests that it was a Coffin-type octagon barn. It was added to the National Register of Historic Places on November 19, 1986. It has subsequently been torn down.
The Thomas Reburn Polygonal Barn is an historic building located near New Albin in rural Allamakee County, Iowa, United States. It was built in 1914 as a beef cattle barn. The building measures 46 feet (14 m) in diameter. It is a 12-sided structure that features red vertical siding and a silo that extends one story through the roof. It is one of four known barns in the round barn genre that was built with a flat or near flat roof in Iowa. It has been listed on the National Register of Historic Places since 1986.
The C.A. Rownd Round Barn is a historic building located in Cedar Falls, Iowa, United States. It was built in 1911 by C.A. Rownd. It is constructed of ashlar-faced blocks that Rownd manufactured on the site. The barn was featured in the April 1912 edition of The Farm Cement News, which was published by Universal Portland Cement. The building is a true round barn that measures 83 feet (25 m) in diameter. It has been listed on the National Register of Historic Places since 1986.
The Round Barn, Washington Township is a historic building located south of Janesville, Iowa in Black Hawk County, United States. It was built in 1917 as a dairy barn. The building is a true round barn that measures 60 feet (18 m) in diameter. The structure is constructed in clay tile and features an aerator and a two-pitch roof. It was built around a silo with a water tank on top of it. While that is typical of this type of structure, it is the only one known to exist in Iowa. It has been listed on the National Register of Historic Places since 1986.
The Robert Kirkpatrick Round Barn is a historic building located near Coggon in rural Delaware County, Iowa, United States. It was built in 1919 by Robert Kirkpatrick on his own farm. The building is a true round barn that measures 60 feet (18 m) in diameter. The barn is constructed of clay tiles and features a two-pitch roof with a large hay dormer on the east side and two smaller dormers on the west and north. It is one of 16 clay tile barns that were based on a design from the Johnson Brothers Clay Works in Fort Dodge, Iowa. The use of hollow clay tile is a distinctive trait in the construction of Iowa's round barns. For many years it was used as a dairy barn before becoming a horse barn. It has been listed on the National Register of Historic Places since 2005.
The Spotts Round Barn is a historic building located near Charles City in rural Floyd County, Iowa, United States. It was built in 1914 as a dairy and horse barn. Its design was influenced by the Iowa Agricultural Experiment Station. The building is a true round barn that measures 55 feet (17 m) in diameter. It is constructed of clay tile from the Johnston Brothers Clay Works. It features a two-pitch roof, a large hay dormer on the north side and a 12-foot (3.7 m) central silo. The barn has been listed on the National Register of Historic Places since 1986.
The Herman Wood Round Barn is a historic building located near Iowa Falls in rural Franklin County, Iowa, United States. It was built in 1916 by Herman Wood as a cattle barn. Matt King of the Permanent Buildings Society of Des Moines acted as the building consultant. The building is a true round barn that measures 122 feet (37 m) in diameter. The barn is constructed of clay tile and features a 20-foot (6.1 m) silo that extends through the flat roof. The rather large structure is one of the more unusual round barns in Iowa. The rolled-asphalt roof is suspended by wire cables that are hooked to rods at the top of the silo. King designed the system and wrote an article concerning the barn's construction in a 1917 issue of American Carpenter and Builder. The barn has been listed on the National Register of Historic Places since 1986.
The Holtkamp Round Barn is a historic building located near Salem in rural Henry County, Iowa, United States. It was built in 1918 by its first owner B.J. Holtkamp who used the plans drawn up by Matt L. King. The building is a true round barn that measures 50 feet (15 m) in diameter. It is constructed of clay tile from Mt. Pleasant Brick & Tile Mfg. Co. of Mt. Pleasant, Iowa and features an aerator, hay carrier, and a two-pitch roof. It has been listed on the National Register of Historic Places since 1986.
The Dyas Hexagonal Barn is a historical building located near Bellevue in rural Jackson County, Iowa, United States. Built in 1921, it is a round barn measuring 50 feet (15 m) around, with red horizontal siding on a stone foundation, a tin roof, and a central wood stave silo extending through the roof. Despite the common name, the building is actually eight-sided, and is also known as the Dyas Octagonal Barn. Originally the roof was flat or almost flat; it is one of four round barns known to have been built on the same farm. It has been listed on the National Register of Historic Places since 1986.
The Polygonal Barn, Van Buren Township was a historic building located in Van Buren Township in rural Jackson County, Iowa, United States. It was built in 1920 by Gus Klenney as a sale barn. They house livestock that are shown and sold to buyers. It is not known what livestock were sold here. The building was octagonal in shape and measured 50 feet (15 m) in diameter. It was listed on the National Register of Historic Places in 1986. The structure has subsequently been torn down.
The Wickfield Round Barn is a historic sale barn building located near Cantril in rural Van Buren County, Iowa, United States. Originally called Silvers Sale Pavilion, it was built in 1919 by Alva Hunt for $20,000. The true round barn measures 50 feet (15 m) in diameter. Frank Silvers, a successful hog breeder and businessman, operated the largest Hampshire hog farm in the world. The first floor had seating for 700 people. Silvers' business offices were also located on the first floor. The structure is constructed of clay tile and features an aerator. The two-pitch roof features eight dormers on the lower part and four dormers on the upper part of the roof. It has been listed on the National Register of Historic Places since 1986. There are no round barns in Iowa used as sale barns any longer, and this one is used for storage.
The Slayton Farms-Round Barn is a historic building located near Iowa Falls in rural Hardin County, Iowa, United States. Frank Slayton had it built in 1915 for use as a dairy barn. The barn is one of 16 that was built by the Johnston Brothers Clay Works from Fort Dodge, Iowa. It is constructed of hollow clay tiles and features a gambrel roof with two different pitches and hay dormer. Two aerators flank the central silo on the roof. The interior of the barn is fashioned around the silo from which silage was shoveled to feed the cattle. An overhead track system and a bucket for hauling materials remains intact. It has been listed on the National Register of Historic Places since 1999. Purchased by Engel Family in 2023.
The William Oakland Round Barn is an historic building located near Blairsburg in rural Hamilton County, Iowa, United States. The true round barn measures 50 feet (15 m) in diameter. It is constructed of clay tiles and features a conical roof, aerator, a small dormer on the west side and a larger one on the east side as well as a 16 feet (4.9 m) central silo. William T. Oakland had this structure built in 1910 as a combination hog and sale barn. The ground floor was used for farrowing, while the sale ring was on the upper level. The 16 windows in roof provided light to the sales area. The barn has been listed on the National Register of Historic Places since 1986.
The Octagon Round Barn, Indian Creek Township is a historic building located near Iowa Center in rural Story County, Iowa, United States. It was built in around 1880 as a dairy barn. The octagon-shaped building measures 50 feet (15 m) in diameter. The modified hip roof, heavy timber framing, rectangular interior plan, and general purpose use marks this as a design influenced by Lorenzo S. Coffin, who built the first round barn in Iowa. It has been listed on the National Register of Historic Places since 1986. The barn has deteriorated significantly and it is essentially a pile of wood now.
The Round Barn, Millville Township is an historical building located in rural Clayton County, Iowa, United States. It was built in 1916 as a general purpose barn. The building is a true round barn that measures 72 feet (22 m) in diameter. It is covered in metal vertical siding and features a dome roof, a cupola with an aerator and a central silo. It is one of three round barns extant in Iowa known to have a dome roof. The barn has been listed on the National Register of Historic Places since 1986.
John McGreer Barn and Crib are a historic building (barn) and structure located in rural Harrison Township, Lee County, Iowa, United States. They are located on a farm northwest of the town of Donnellson. The agricultural buildings were listed on the National Register of Historic Places in 2001.
Christian and Katharina Herschler House, Barn, and Outbuildings Historic District are historic buildings located in Franklin, Iowa, United States. The historic district, now known as the Christian Herschler Winery, is located on the edge of town. It was listed on the National Register of Historic Places in 1996. At the time of its nomination it included three contributing buildings: the house (1865), barn (1865) and a shed/summer kitchen. It also includes two noncontributing buildings: a two-room brick structure and a cement foundation. The Herschlers raised their own grapes and operated the town's only winery.
Daniel Nelson House and Barn, also known as the Nelson Pioneer Farm and Museum, are historic buildings located north of Oskaloosa, Iowa, United States. Daniel and Margaret Nelson settled here in 1844, a year after this part of Iowa was opened to settlement by the U.S. Government. Their first home was a log structure, non-extant, located northeast of the present house. The present house is a two-story, brick structure with a gable roof. The wooden porches on the front and back of the house date from 1898 to 1900. The large barn measures 61 by 46 feet, and was built in 1856. It is composed of board and batten construction from oak that was milled on the site. It was used largely as a granary, rather than a shelter for farm animals. Three other buildings included in the historic designation include the summer kitchen, woodshed, and a small outdoor privy. The dates of construction for the three frame buildings is unknown. The farm remained in the Nelson family until 1941 when it was abandoned with most of the original furnishings intact. The property was donated to the Mahaska County Historical Society, which now operates it as a museum. Other historic buildings have been moved to this location over the years. It was listed on the National Register of Historic Places in 1974.
The William Dyas Barn is a historic agricultural building located south of Bellevue, Iowa, United States. It is one of over 217 limestone structures in Jackson County from the mid-19th century, of which 58 are non-residential, agricultural related structures. The stones used to build the barn were quarried, but they vary widely in size and shape. The larger stones are at the bottom of the structure, and they diminish in size the higher up on the walls. An unusual feature on this barn is that the gable ends are not stone, but timber. The Dyas family were among the first settlers in Jackson County, arriving in 1833. They built five houses in this valley. William Dyas built a brick house along with this barn. It is believed there were many more stone barns in the county, but they have been removed over the years. That gives this barn the added significance of being an example of a vanishing building type. It was listed on the National Register of Historic Places in 1991.
Mulcahy Barn is a historic building located south of Colo, Iowa, United States. It is a hybrid of German and English immigrant barns, and it is considered an excellent example of a bank barn. The German influence was the placement of the livestock on the lower level, while the simple lines of the upper level reflect the British/colonial influence. The Mulcahy's, who built the barn, were more than likely familiar with the latter. They learned the former after their arrival in Iowa, which had a large German and Scandinavian population by the time they arrived. It was completed around 1885 with board and batten siding on the upper portion and a fieldstone foundation. That foundation was replaced in the mid-20th century with concrete, and again with concrete in 2000. The barn was listed on the National Register of Historic Places in 2004.
