The James Greer McQuilkin Round Barn is a historic building located near Eagle Center in rural Benton County, Iowa, United States. It was built in 1918 for James Greer McQuilkin. He farmed and sold barns that were designed by Johnston Brothers' Clay Works. The building is a true round barn that measures 60 feet (18 m) in diameter. The barn is constructed of clay tile and features a hay dormer on the north side. The structure does not have a cupola, but has a silo that rises from the center. A new metal roof was added in 1998. 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 Erza McKenzie Round Barn is a historic building located near Hazleton in rural Buchanan County, Iowa, United States. It was built in 1922 by Erza McKenzie for a dairy barn. The building is a true round barn that measures 70 feet (21 m) in diameter. The barn is constructed of clay tile and features small cupolas on the west, southwest and south sides of the structure. The building features a two-pitch roof and a central silo. 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 Grimes Octagon Barn is an historic building located near West Union in rural Fayette County, Iowa, United States. It was built by Joe Butler in 1880 for M.W. Grimes. The building is an octagon that measures 65 feet (20 m) in diameter. It is one of 14 known 19th-century octagon barns that still exist on an Iowa farm. The barn features red metal siding, a roof composed of wedge-shaped sections and a hay dormer. The sectional roof marks it as a Stewart type that was named for the New York farmer and agricultural editor Elliott W. Stewart, who designed the prototype in 1874. The barn has been listed on the National Register of Historic Places since 1986.
The Brooks Round Barn was a historical building located near Nashua in rural Floyd County, Iowa, United States. It was built in 1914 by Emil Cable, with Dale Butler as the supervisor. The building was a true round barn that measured 74 feet (22.6 m) in diameter. It was constructed of clay tile and featured a two-pitch roof and a 16-foot (4.9 m) central clay tile silo. The interior featured stanchions around the silo on the ground floor, double horse stalls and grain bins in a circular arrangement on the main floor, and a hayloft. The barn was listed on the National Register of Historic Places in 1986. It was destroyed in 1995.
The Nelson Round Barn is a historic building located near Allerton in rural Wayne County, Iowa, United States. It was built in 1912, and it was originally used as a dairy barn. The building is a true round barn that measures 50 feet (15 m) in diameter. It features white vertical siding, an aerator, and a conical roof. The barn has been listed on the National Register of Historic Places since 1986.
The Tonsfeldt Round Barn is a historic building located on the Plymouth County Fairgrounds in LeMars, Iowa, United States. It was built in 1918 to house H.P. Tonsfeldt's purebread Polled Hereford cattle, and prize bull, on his farm west of the city. The building is a true round barn that measures 82 by 68 feet. The barn features white horizontal siding, an aerator and a Gothic curved roof. The self-supporting Gothic-arch dome of this barn is a unique feature on Iowa's round barns. In 1981 the barn was moved from the farm to the fairgrounds in order to preserve it. It is now used for exhibit space. The barn has been listed on the National Register of Historic Places since 1986.
The George Darrow Round Barn is a historic building located near Alta Vista in rural Chickasaw County, Iowa, United States. The true round barn was constructed of clay tile in 1916. The use of clay tiles suggests that it was influenced by the work of the Iowa Agricultural Experiment Station in the early 20th-century. It has a diameter 64 feet (20 m), and a height of 50 feet (15 m). The barn features a two-pitch roof and a 14-foot (4.3 m) central clay tile silo. It was built as a dairy barn and it was used as such until 1978. Dairy cow stanchions surround the central silo on one side of the barn in a circular arrangement, and horse stalls surround the other side. The barn has been listed on the National Register of Historic Places (NRHP) since 1986. It has subsequently been torn down. It was removed from the NRHP in 2022.
The Frantz Round Barn is a historic building that was located near Grand Junction in rural Greene County, Iowa, United States. It was built by Beecher Lamb in 1911. The true round barn measured 55 feet (17 m) in diameter. The barn was constructed in concrete block from Mid-Iowa Concrete of Grand Junction. It featured a 56-foot (17 m) tall central silo that was 16-foot (4.9 m) in diameter. The interior had a circular around the central silo on the first floor. The second floor had stalls for 12-14 horses, a circular, haymow, and granary. The barn was listed on the National Register of Historic Places since 1986. It has subsequently been torn down.
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 Dobbin Round Barn is a historic building located near State Center in rural Marshall County, Iowa, United States. The true round barn was built in 1919 by Ike Ingersol and Amos Thomson. It was built from a Gordon Van Tine Co. kit for $6,000. It features white vertical siding, a two-pitch roof, louvered cupola and a 12-foot (3.7 m) diameter central silo. The barn has a diameter of 60 feet (18 m). It was built as a dairy and horse barn. The barn has been listed on the National Register of Historic Places since 1986. It is currently owned by Daniel Dobbin.
The Eckle Round Barn is a historic building that was located near Shelby in rural Pottawattamie County, Iowa, United States. The true round barn was built by Ed Brown and George Robinson in 1928 for Richard Eckle. It has a diameter of 54 feet (16 m). The barn featured white horizontal siding, a two-pitch sectional roof, aerator and a central clay tile silo with a 14-foot (4.3 m) diameter. The barn was listed on the National Register of Historic Places in 1986. It has subsequently been torn down.
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 Thomas Johnson Polygonal Barn was a historic building located near Wellman in rural Washington County, Iowa, United States. The 16-sided building measured 40 feet (12 m) in diameter. The structure was covered in red vertical siding and it was topped by a sectional conical roof, with windows on the south side and an aerator. The numerous windows and the 15 hog pens that were around its perimeter suggests that this was built as a hog barn as light and ventilation in hog barns were a concern in the early 20th-century. It was listed on the National Register of Historic Places in 1986. The barn has subsequently been torn down, and it was removed from the National Register in 2014.
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 Clark Round Barn was an historic building located near Tyrone in rural Monroe County, Iowa, United States. It was built in 1908 for Charles Henry Clark, Sr. The building was a true round barn that measured 48 feet (15 m) in diameter. It featured a conical roof, four-sided cupola and a central silo that was 14-foot (4.3 m) in diameter and 30-foot (9.1 m) high. The siding was pine and the original cedar singles had been replaced in the 1960s. The barn was listed on the National Register of Historic Places since 1986. It was torn down in 1999.
