The Octagon House is a historic octagon house at 21 Spring Street in Danbury, Connecticut, United States. It is considered the best octagon house of those that survive in Connecticut. In 1973 it was added to the National Register of Historic Places to avert its demolition in urban renewal.
The William Bryant Octagon House is an historic octagon house located at 2 Spring Street in Stoneham, Massachusetts. Built in 1850, it is the best-preserved of three such houses built in the town in the 1850s. It was listed on the National Register of Historic Places in 1984.
The Sinnett Octagon House built in 1855 is a historic octagonal house in Muscatine, Iowa. The two-story brick home with wrap-around porch and windowed cupola is now used as an office building.
The Langworthy House, also known as the Octagon House, is an historic building located in Dubuque, Iowa, United States. Built in 1856, it was designed by local architect John F. Rague for local politician Edward Langworthy. The two-story brick home features tall windows, a columned entry, and a windowed cupola. Langworthy and three of his brothers were among the first settlers in Dubuque. They were partners in a lead mine, helped to build the territorial road between Dubuque and Iowa City, they farmed, invested in real estate, and they owned a steamboat and a mercantile exchange. The house has been passed down through Langworthy's descendants. It was individually listed on the National Register of Historic Places in 1975, and it was included as a contributing property in the Langworthy Historic District in 2004.
The Octagon Barn, Richland Township is an historic building located near Jamaica in Guthrie County, Iowa, United States. Built in 1881, this is the oldest known octagon-shaped barn extant in Iowa. It measures 70 feet (21 m) in diameter. The modified hip roof, heavy timber construction, rectangular plan, and general purpose use marks this as a Coffin type. It was named for Lorenzo S. Coffin who is thought to have built the first round barn in the state. This barn was listed on the National Register of Historic Places in 1986. The metal band Slipknot filmed the music video for Psychosocial here.
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 Fobes Octagon Barn is a historic building located south of Lanesboro, Iowa, United States. It was built in 1883, and at the time of its nomination it was one of 14 octagon-shaped barns from the 19th-century left in Iowa. The barn has a diameter of 66 feet (20 m) and features a stone foundation, and a hip roof with a square cupola on top. The modification of the roof suggests this is a "Coffine type" structure similar to others built by Lorenzo Coffin. The general purpose barn has two granaries, horse stalls, and the rest of the space is open for agricultural machinery. It was listed on the National Register of Historic Places in 1986.
The Roberts Octagon Barn built in 1883 is an historic octagonal barn located on CR W62 near Sharon Center, Johnson County, Iowa. On June 30, 1986, it was added to the National Register of Historic Places.
The John Hastings Cottage is an historic house at 31 William Street in Worcester, Massachusetts. Built about 1880, it is a distinctive example of Victorian Gothic architecture. The house was listed on the National Register of Historic Places in 1980, where it is misspelled as "Hastins".
The George H. Gallup House built in 1901 is an historic octagonal house located at 703 South Chestnut Street in Jefferson, Iowa, United States. It was the birthplace and boyhood home of Dr. George Horace Gallup, the pioneer of public opinion polling. On July 18, 1985, it was listed on the National Register of Historic Places.
The Henry H. Smith/J.H. Murphy House is a historic building located on the east side of Davenport, Iowa, United States. It was listed on the National Register of Historic Places in 1983. In 1997 it was listed on the Davenport Register of Historic Properties as the Octagon House.
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 Lenox Round Barn is a historic building that is part of the Taylor County Historical Museum in Bedford, Iowa, United States. The true round barn was built somewhere between 1905 and 1907. The building measures 64 feet (20 m) in diameter and 55 feet (17 m) in height. It features white vertical siding, a large cupola, and a two-pitch roof. The barn was thought to have been designed and built by J.E. Cameron on his farm 5 miles (8.0 km) south of Lenox.
The Iowa County Courthouse in Marengo, Iowa, United States, was built in 1893. It was listed on the National Register of Historic Places in 1981 as a part of the County Courthouses in Iowa Thematic Resource. The courthouse is the fourth building the county has used for court functions and county administration.
The Marion County Courthouse in Knoxville, Iowa, United States was built in 1896. It was listed on the National Register of Historic Places in 1981 as a part of the County Courthouses in Iowa Thematic Resource. The courthouse is the third building the county has used for court functions and county administration.
The J.H. Riekenberg House is a historic residence located in Boone, Iowa, United States. Born in Schleswig, Germany, Riekenberg emigrated to the United States in 1867, and became a successful businessman and civic leader in Boone. He had Charles E. Edwins, a local architect, design this house, and local contractor J.J. Thoren built it in 1898. The 2½-story, frame Queen Anne house features an asymmetrical plan, steeply pitched roof, a wrap-around front porch, a variety of wall surface texture, an octagonal corner tower, and Palladian elements in the gable ends. The house was listed on the National Register of Historic Places in 1987.
The William R. and Martha Foster Shriver House is a historic residence located in Winterset, Iowa, United States. William R. Shriver was an Ohio native who settled in Jefferson County, Iowa before he moved to Madison County in 1853–54. He married Martha Foster in 1858 in Winterset. He was a wagon-maker by trade, and served as a lieutenant in the 1st Iowa Cavalry during the American Civil War. Shriver went into farming in the 1870s, and they left this house at that time. He went on to serve as the Clerk of District Court from 1882 to 1887. The Shrivers left Iowa for California in 1890 because of Martha's health. She died there that same year, and William returned to Iowa permanently in 1900.
The John N. and Mary McQuilken House, also known as the Emelia J. Schleeser House and the Joan E. Schreiber House, is a historic building located in La Porte City, Iowa, United States. McQuilken was a meat and poultry merchant, and then an insurance salesman. He and his wife Mary had no children. Built from 1900 to 1901, the house's architect and builder are unknown. It features Colonial Revival influences in its complex gambrel roof system and inset porch. Around 1960 the second floor was converted into an apartment. A renovation in the mid-1980s returned the house as much as possible to its original form. It was listed on the National Register of Historic Places in 1994.
The Edwards-Swayze House is a historic building located in Nevada, Iowa, United States. Clayton F. Edwards, a local merchant, had this house built in 1878. He sold the house to Emma Swayze, the wife of banker W.F. Swayze, in 1890 when he relocated to Kennard, Nebraska. The house follows a vernacular form with elements of the Queen Anne style that were not fully integrated or carried though. The 2½-story brick structure features an irregular plan, octagonal turret, hip roof, shingled gable ends, enclosed porches, and window hoods. It was listed on the National Register of Historic Places in 1978.
The Dr. J.O. and Catherine Ball House is a historic building located in Mount Pleasant, Iowa, United States. In 1892 this was one of three houses designed by George F. Barber's mail-order architectural firm that was being built in town, and it was the most elaborate of the three. The house is an enlargement of Barber's more expensive plans for design no. 33 from his 1891 book. The 2½-story frame Queen Anne features an irregular plan, a brick-faced limestone foundation, and an octagonal tower with an ogee shaped roof. The circular window on the second story projection is framed with three balconies, one above and one on either side. The wrap-around porch has a projecting gable roof supported by turned columns. A two-story bay window is located on the east elevation. It was also the first house in Mount Pleasant that was totally reliant on electricity for lighting. It was built for Dr. J.O. Ball, a dentist, who was active in civic improvements in Mount Pleasant. The house was listed on the National Register of Historic Places in 1986.
