The Fred W. Meier Round Barn was a historic building located near Ludlow in rural Allamakee County, Iowa, United States. It was built in 1912 by Fred W. Meier. The building was a true round barn that measures 56 feet (17 m) in diameter. The bottom half of the barn was constructed in stone and featured red horizontal siding, 2-pitch conical roof, aerator and an internal wood stave silo. It was listed on the National Register of Historic Places in 1986. The structure was destroyed in a thunderstorm during the night of July 27, 2002.
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 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 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 Waveland Round Barn was a historic building located near Cushing in rural Ida County, Iowa, United States. Built in 1900, the barn measured 50 feet (15 m) in diameter. It featured red vertical siding, a large central section with a conical roof, a wing section that surrounded the central section with a sectional roof and a hay dormer above the main entrance on the east side. The three-story central section makes this an unusual round barn in Iowa. It was listed on the National Register of Historic Places in 1986. The barn was bulldozed and the remains were burnt in March 2012.
The Polygonal Barn, New Oregon Township is an historic building located near Cresco in rural Howard County, Iowa, United States. It was built in 1920 as a show barn for English Shorthorn cattle. The 16-sided building measures 70 feet (21 m) in diameter. The polygonal barn of 6 to 16 equal sides is the most common variation of the round barn that was constructed in Iowa. It features a two-pitch sectional roof, a 13 feet (4.0 m) central silo and small dormers near the top of the roof on the north and south sides. The barn was used for dairy cattle from 1958 to 1968, and it was then used for pigs and feeder cattle. It 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 Plagmann Round Barn is an historic building located near Conroy in rural Iowa County, Iowa, United States. It was built in 1912 as a cattle barn by Charles and Richard Plagmann. The building is a true round barn that measures 100 feet (30 m) in diameter. It is one of the largest Iowa Agriculture Experimental Station/Matt King type barns in the state. It is three floored — at the bottom is the feeding floor, at the middle is the stalls and at the top is the haymow. The barn is constructed of terracotta clay tile and features an aerator, a two-pitch roof and a 16-foot central silo. 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, Lincoln Township was a historic building located in Lincoln Township in rural Johnson County, Iowa, United States. It was built in 1880 by George Frank Longerbean. The barn was an 8-sided structure and has subsequently been torn down. It featured a bell shaped roof of curving hand-laminated beams. The building was listed on the National Register of Historic Places in 1986.
The Round Barn, Cooper Township is a historic building located in Cooper Township southwest of Mapleton in rural Monona County, Iowa, United States. It was built in 1921 by Seth Smith. An auctioneer had this barn built to sell his purebred cattle. The building is a true round barn that measures 38 feet (12 m) in diameter. The barn features white vertical siding, a conical roof, and an aerator. It has been listed on the National Register of Historic Places since 1986.
The Round Barn, Washington Township is a historic building located near Sciola in rural Montgomery County, Iowa, United States. It was built in 1917 as a hog barn. Typical of a barn built for this use in features a multitude of windows on the wall and on the cupola, which provided light and ventilation. The building is a 24-sided structure that measures 60 feet (18 m) in diameter. The barn features red vertical siding, a 12-section cupola, and a two-pitch sectional roof. It has been listed on the National Register of Historic Places since 1986.
The Round Barn, Buckingham Township is an historic building located north of Traer in Tama County, Iowa, United States. It was built in 1920 as a general purpose barn. The building is a true round barn that measures 50 feet (15 m) in diameter. The structure is constructed in clay tile from the Johnston Brothers' Clay Works and features an aerator and a segmented two-pitch roof. It has been listed on the National Register of Historic Places since 1986.
The John W. Young Round Barn is an historic building located near Traer in rural Tama County, Iowa, United States. It was built in 1917 by Joe Seda as a general purpose barn. The building is a true round barn that measures 65 feet (20 m) in diameter. The structure is constructed in clay tile and features a two-pitch roof and an 18-foot (5.5 m) central silo that is 45 feet (14 m) high. It has been listed on the National Register of Historic Places since 1986.
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 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.
The Round Barn, Pilot Grove Township is an historical building located in rural Montgomery County, Iowa, United States. It was built in 1912 as a general purpose barn. The building is a true round barn that measures 60 feet (18 m) in diameter. It is the type that was promoted by the Illinois Agricultural Experiment Station. The barn is covered in white vertical siding and features a two-pitch roof, a small dormer on the south side and an 18-foot (5.5 m) central silo. It has been listed on the National Register of Historic Places since 1986.
August Nus Polygonal Barn is a historic building located east of Arlington, Iowa, United States. Built in 1906, this was one of four flat roofed barns that were known to exist in Iowa, and it was the oldest of the four. The 12-sided structure with horizontal wood siding was built around a central silo that extends above the barn. Eventually, it had a cone shaped roof. The barn is 60-foot (18 m) in diameter, and the silo is 14 feet (4.3 m) in diameter. The barn was listed on the National Register of Historic Places in 1986.
