William LaBarthe Steele was an important architect of the Prairie School during the early twentieth century. A graduate of the University of Illinois, Steele worked in the office of renowned architect Louis Sullivan in Chicago, Illinois 1897–1900. He relocated to Pittsburgh, Pennsylvania to gain additional experience with three other architectural firms.
Purcell & Elmslie (P&E) was the most widely know iteration of a progressive American architectural practice. P&E was the second most commissioned firm of the Prairie School, after Frank Lloyd Wright. The firm in all iterations was active from 1907 to 1921, with their most famous work being done between 1913 and 1921.
Roy Blass was an American architect whose work included design of Lustron houses.
The Iowa Bridge Company was a company that designed and built many bridges that are listed on the U.S. National Register of Historic Places.
Wayland & Fennell was an architectural firm in Idaho. Many of their works are listed on the U.S. National Register of Historic Places.
Hawk & Parr was an architectural firm in Oklahoma. It designed many buildings that are listed on the U.S. National Register of Historic Places. Its Mission/Spanish Revival style Casa Grande Hotel, for example, was built in 1928 and was listed on the National Register in 1995.
Frederick Adolph Brinkman was an American architect based in Kalispell, Montana, and Brinkman and Lenon is a partnership in which he worked. More than a dozen of Brinkman's extant works in and around Kalispell have been listed on the National Register of Historic Places, including the Anderson Style Shop, Charles Boles House, Brice Apartments, City Water Department, Cornelius Hedges Elementary School, Russell School, Linderman School, the Montgomery Ward Store in Kalispell, and the O'Neil Print Shop.
Hugill & Blatherwick was an architectural firm in Sioux Falls, South Dakota that was founded by George C. Hugill and Wilfred F. Blatherwick circa 1921. A number of their works are listed on the U.S. National Register of Historic Places.
Fremont D. Orff was an American architect.
James Wingfield Golucke (1865–1907), often known as J.W. Golucke, was an American architect based in Atlanta, Georgia.
Joseph Schwartz, known also as Josef Schwartz, was a notable architect of Sioux Falls, South Dakota.
Charles Emlen Bell (1858–1932), often known as C.E. Bell, was an American architect of Council Bluffs, Iowa and Minneapolis, Minnesota. He worked alone and in partnership with John H. Kent and Menno S. Detweiler. He also worked as part of Bell, Tyrie and Chapman. A number of his works are listed on the U.S. National Register of Historic Places.
Wing & Mahurin was an architectural firm of Fort Wayne, Indiana. Its principal partners were John F. Wing (1852-1947) and Marshall S. Mahurin (1857-1939), who were partners until 1907. Together with Guy M. Mahurin (1877-1941) they worked also as Mahurin & Mahurin.
Frank E. Wetherell (1869-1961) was an architect in the U.S. state of Iowa who worked during 1892–1931. He founded the second oldest architectural firm in the state in Des Moines, Iowa, in 1905. He worked with Roland Harrison in partnership Wetherell & Harrison. The firm designed numerous Masonic buildings.
Omeyer & Thori was an architectural partnership of Diedrik A. Omeyer (1850-1907) and Martin P. Thori (1864-1905). The two were immigrants from Norway.
Wallace L. Dow, often known as W.L. Dow, was an architect of Sioux Falls, South Dakota.
Ursa Louis Freed was an American architect active in North and South Dakota. A number of his works are listed on the U.S. National Register of Historic Places. He was a member of the American Institute of Architects from 1951 until his death in 1957.
The Douglas County Courthouse and Auditor's Office in Armour, South Dakota was listed on the National Register of Historic Places in 1978.
The Old Redfield City Hall, at 517 N. Main St. in Redfield, South Dakota, was built in 1928. It was listed on the National Register of Historic Places in 1997.
Kings & Dixon was an architectural firm based in Mitchell, South Dakota. A number of its works are listed on the National Register of Historic Places.
