This is a list of defunct automobile manufacturers of the United States. They were discontinued for various reasons, such as bankruptcy of the parent company, mergers, or being phased out.
Forest City (1905) Manufactured as the Jewell beginning in 1906. Organized in Cleveland, Ohio, & named for the city nickname.
Forsyth (circa 1896) Franklin, Minnesota; only a prototype built.
Forth (1905) New York company, one of two of the same name, organized by Clarence Forth. No cars built.
Forth (1910–1911) Mansfield, Ohio, company, one of two of the same name, organized by Clarence Forth. Only one prototype car assembled; went bankrupt late 1911.
Fort Pitt (1908–1910, 1911) Organized in New Kensington, Pennsylvania; moved to Pittsburgh 1911. Always known as the Pittsburgh Six
Harry S. Houpt Manufacturing Company: (See Houpt (1909); The "New Departure Manufacturing Company" (Bristol, Connecticut) forming of Houpt-Rockwell in 1910) Covered in the German Wikipedia
↑"American Motor Company". Horseless vehicles, automobiles, motor cycles operated by steam, hydro-carbon, electric and pneumatic motors: a practical treatise for ... everyone interested in the development, use and care of the automobile, including a special chapter on how to build an electric cab, with detail drawings / by Gardner D. Hiscox. January 1, 1900. Retrieved March 15, 2025.
↑Lewis, Mary Beth. "Ten Best First Facts", in Car and Driver, 1/88, p. 92.
↑"Mueller Manufacturing Company". Horseless vehicles, automobiles, motor cycles operated by steam, hydro-carbon, electric and pneumatic motors: a practical treatise for ... everyone interested in the development, use and care of the automobile, including a special chapter on how to build an electric cab, with detail drawings / by Gardner D. Hiscox. January 1, 1900. Retrieved March 15, 2025.
↑Flory, p. 1016. Fitting Cadillac V8s into Studebakers was common in the 1950s, under the nickname Studillac, as well as into Fords as Fordillacs; it appears Flory has mistaken it.
↑Kimes, Beverly R. (editor), and Clark, Henry A. The Standard Catalog of American Cars 1805–1945. Krause Publications, 1985, p. 1455. ISBN0-87341-045-9.
↑"Wagenhals". They built a city; 150 years of industrial Cincinnati / compiled and written by the Cincinnati Federal Writers' Project of the Works Progress Administration in Ohio; James Garfield Stewart, mayor of Cincinnati, cooperating sponsor. January 1, 1938. Retrieved July 7, 2026.
↑Detroit-based builder of "generic" cars without badges so dealers could badge them as desired. Clymer, p.146.
Automobile Quarterly (eds.). The American Car Since 1775. Kutztown, PA: Automobile Quarterly, Inc., 1971. ISBN0-525-05300-X
Bird, Anthony and Douglas-Scott Montagu of Beaulieu, Edward: Steam Cars, 1770–1970, Littlehampton Book Services Ltd., 1971. ISBN0-304-93707-X: ISBN978-0-304-93707-3
Clymer, Floyd. Treasury of Early American Automobiles, 1877–1925. New York: Bonanza Books, 1950.