27 Tractor manufacturers of the United States

The Advance-Rumely Company of La Porte, Indiana started in 1853 manufacturing threshers and later moved on to steam engines. It was an American pioneering producer of many types of agricultural machinery, most notably threshing machines and large tractors. Allis-Chalmers Manufacturing Co. purchased Advance-Rumley in 1931. The company's main works would become what was later known as the "La Porte plant".

Allis-Chalmers was a U.S. manufacturer of machinery for various industries. Its business lines included agricultural equipment, construction equipment, power generation and power transmission equipment, and machinery for use in industrial settings such as factories, flour mills, sawmills, textile mills, steel mills, refineries, mines, and ore mills. The first Allis-Chalmers Company was formed in 1901 as an amalgamation of the Edward P. Allis Company, Fraser & Chalmers, the Gates Iron Works, and the industrial business line of the Dickson Manufacturing Company. It was reorganized in 1912 as the Allis-Chalmers Manufacturing Company. During the next 70 years its industrial machinery filled countless mills, mines, and factories around the world, and its brand gained fame among consumers mostly from its farm equipment business's orange tractors and silver combine harvesters. In the 1980s and 1990s, a series of divestitures transformed the firm and eventually dissolved it. Its successors today are Allis-Chalmers Energy and AGCO.

The Avery Company, founded by Robert Hanneman Avery, was an American farm tractor manufacturer famed for its undermounted engine which resembled a railroad engine more than a conventional farm steam engine. Avery founded the farm implement business after the Civil War. His company built a large line of products, including steam engines, beginning in 1891. The company started with a return flue design and later adapted the undermount style, including a bulldog design on the smokebox door. Their design was well received by farmers in central Illinois. They expanded their market nationwide and overseas until the 1920s, when they failed to innovate and the company faltered. They manufactured trucks for a period of time, and then automobiles. until they finally succumbed to an agricultural crisis and the Depression.

The Case Corporation was a manufacturer of construction equipment and agricultural equipment. Founded, in 1842, by Jerome Increase Case as the J. I. Case Threshing Machine Company, it operated under that name for most of a century. For another 66 years it was the J. I. Case Company, and was often called simply Case. In the late 19th century, Case was one of America's largest builders of steam engines, producing self-propelled portable engines, traction engines and steam tractors. It was a major producer of threshing machines and other harvesting equipment, The company also produced various machinery for the U.S. military. In the 20th century, Case was among the ten largest builders of farm tractors for many years. In the 1950s its construction equipment line became its primary focus, with agricultural business second.

Case IH is a brand of agricultural equipment. It was created in 1985 when Tenneco bought selected assets of the agricultural division from International Harvester and merged it into its J.I. Case Company Today Case IH is owned by CNH Industrial, which in turn is financially controlled by the Italian investment company Exor, which belongs to the Agnelli family.

The Oliver Farm Equipment Company was an American farm equipment manufacturer from the 20th century. It was formed as a result of a 1929 merger of four companies: the American Seeding Machine Company of Richmond, Indiana; Oliver Chilled Plow Works of South Bend, Indiana; Hart-Parr Tractor Company of Charles City, Iowa; and Nichols and Shepard Company of Battle Creek, Michigan

The Eagle Manufacturing Company of Appleton, Wisconsin, United States, first entered the farm equipment market in 1906 with a 32-horsepower (24 kW) tractor. In 1899 the company was located at 671 Superior St in Appleton Wisconsin. In 1904 it built a production facility designed by architect Wallace W. De Long. It returned to the marketplace several years later, in 1929 offering a 20-35 Model E. Based on a two-cylinder traction engine design, the engine measured 8.00x9.00 inches in bore and stroke. A truly massive affair, it was rated at 20 drawbar horsepower and 35 belt-pulley horsepower. Eagle also built its Model H alongside the Model E from 1926 to 1930. With an identical 8.00-inch (203 mm) bore to the Model E, but a 1.00-inch (25 mm) longer stroke at 10.00 inches, the Model H created a brawny 40 horsepower (30 kW) at the drawbar. Eagle was one of the first tractor manufacturers to use a 6-cylinder engine. It switched from 2 cylinders to 6 cylinders in 1930. Eagle built tractors from 1906, but halted production during World War II never to start its assembly lines again.

The Four Drive Tractor Company - also known as Fitch Four Drive Tractor Company - was an agricultural equipment manufacturer which was based in Big Rapids, Michigan. The company was formed in 1915 in Ludington, Michigan and produced tractors until 1930.

Ford Motor Company, commonly known as Ford, is an American multinational automaker that has its main headquarters in Dearborn, Michigan, a suburb of Detroit. It was founded by Henry Ford and incorporated on June 16, 1903. The company sells automobiles and commercial vehicles under the Ford brand, and most luxury cars under the Lincoln brand. Ford also owns Brazilian SUV manufacturer Troller, an 8% stake in Aston Martin of the United Kingdom and a 32% stake in Jiangling Motors. It also has joint-ventures in China, Taiwan, Thailand, Turkey, and Russia. The company is listed on the New York Stock Exchange and is controlled by the Ford family; they have minority ownership but the majority of the voting power.

Fordson was a brand name of tractors and trucks. It was used on a range of mass-produced general-purpose tractors manufactured by Henry Ford & Son Inc from 1917 to 1920, by Ford Motor Company (U.S.) and Ford Motor Company Ltd (U.K.) from 1920 to 1928, and by Ford Motor Company Ltd (U.K.) from 1929 to 1964. The latter also later built trucks and vans under the Fordson brand.

Gibson Manufacturing Corporation was a company that made tractors and railroad speeders. It is estimated they made around 60,000 tractors.

The International Harvester Company was an American manufacturer of agricultural equipment, automobiles, commercial trucks, lawn and garden products, household equipment, and more. It was formed from the 1902 merger of McCormick Harvesting Machine Company and Deering Harvester Company and three smaller manufactures Milwaukee; Plano; and Warder, Bushnell, and Glessner. In the 1980s all divisions were sold off except for International Trucks which was sold to Volkswagen in 2020. Its brands included McCormick, Deering, and later, McCormick-Deering, as well as International. Along with the Farmall and Cub Cadet tractors, International was also known for the Scout and Travelall vehicle nameplates. Given its monumental importance to the building of rural communities the brand continues to have a massive cult following. The International Harvester legacy non-profits host some of the largest ag related events in the United States.

J.D. Adams & Company was founded in 1885 by Joseph D Adams who invented the first leaning-wheel pull grader and was based in Indianapolis. The company manufactured construction machinery including sheepsfoot rollers, dozers and graders from its factory. The company catalogues also listed products by Acme Road Machinery Company though the association is unknown beyond the product listings. In 1955 LeTourneau-Westinghouse purchased J.D. Adams & Co and continued to operate under the name until 1960.

John Deere is the brand name of Deere & Company, an American corporation that manufactures agricultural, construction, and forestry machinery, diesel engines, drivetrains used in heavy equipment, and lawn care equipment. In 2019, it was listed as 87th in the Fortune 500 America's ranking and was ranked 329th in the global ranking. The company also provides financial services and other related activities.

Killen-Strait was an American engineering company.

The Leader Tractor Company was a small tractor manufacturer operating first out of Auburn then Chagrin Falls, Ohio in the early 1940s.

Minneapolis-Moline was a large tractor and farm and industrial machinery producer based in Hopkins, Minnesota. It was the product of a merger of three companies in 1929: Minneapolis Steel & Machinery (MSM) which was noted for its Twin City tractors, Minneapolis Threshing Machine Company (MTMC) which also produced Minneapolis tractors, and Moline Plow Company. It had manufacturing facilities on Lake Street at Hiawatha Avenue in Minneapolis, MN, in Hopkins, MN and in Moline, IL.

The Moline Plow Company was an American manufacturer of plows and other farm implements, headquartered in Moline, Illinois, USA.

The Oliver Farm Equipment Company was an American farm equipment manufacturer from the 20th century. It was formed as a result of a 1929 merger of four companies: the American Seeding Machine Company of Richmond, Indiana; Oliver Chilled Plow Works of South Bend, Indiana; Hart-Parr Tractor Company of Charles City, Iowa; and Nichols and Shepard Company of Battle Creek, Michigan

Reeves & Co. was an American farm tractor builder for thirty years, based in Columbus, Indiana. It built some of the largest steam traction engines used in North America.

Samson Tractor was an American brand of tractors 1900 to 1923, of trucks from 1920 to 1923, and a General Motors brand from 1917 to 1923.

Simplicity Manufacturing Company was an American company based in Port Washington, Wisconsin that builds lawn and garden equipment under various brands. The company was founded by William J. Niederkorn in 1922, and started building walk-behind two-wheeled tractors in 1939. Between 1941 and 1945, due to World War II, Simplicity Manufacturing temporarily halted production of lawn and garden products, and manufactured electric fence controllers and external surface grinders to satisfy the War Production Board. Simplicity built is first riding tractor in 1957 which was the model Wonderboy. Allis-Chalmers purchased the company in 1965, and Simplicity's management bought it back in 1983. Simplicity Manufacturing celebrated its 75th anniversary in 1997 with a special 75th anniversary tractor model. The tractor featured a special blue paint scheme with chrome Harley-Davidson lights and muffler.

Twin City tractors were built by the Minneapolis Steel & Machinery Company until 1929 when it merged with the Moline Implement Company of Illinois and the Minneapolis Threshing Machine Company of Hopkins, Minnesota.

Wheel Horse was a manufacturer of outdoor and garden power equipment, including lawn and garden tractors. The company's headquarters were in South Bend, Indiana.

White Farm Equipment is a brand of agricultural machinery, now discontinued except for planter, and owned by AGCO.