Vehicle manufacturing companies disestablished in 1918

Ohio Electric Car Company was a brass era electric car company founded in 1909 in Toledo, Ohio.

McLaughlin Motor Car Company Limited was a Canadian manufacturer of automobiles headquartered in Oshawa, Ontario. Founded by Robert McLaughlin, it once was the largest carriage manufacturing factory in the British Empire.

The Princess was an automobile built in Detroit, Michigan by the Princess Motor Car Company from 1914 until 1918.

The Palmer-Moore Company (1906–1918) was a manufacturer of gasoline and air-cooled motor engines and marine engines in Syracuse, New York. The company began production of commercial trucks beginning in 1912. They were the third manufacturer in the city in the business and specialized in the manufacture of custom designs for local industries.

The General Aeroplane Company was Detroit's first commercial airplane builder. GAC built three types of aircraft during the First World War and operated a flying school. The aircraft were the Verville Flying Boat, the Gamma S biplane with floats (floatplane), and the Gamma L biplane with wheels. All had engine installations driving pusher propellers.

Costruzioni Meccaniche di Saronno was an Italian company producing steam locomotives and cars, active from 1887 to 1918.

Ford Tractor Company was a Minneapolis-based company active from 1916 to 1917, that built tractors to facilitate "horseless farming".

Two brass era companies used the Pilgrim marque for their automobiles between 1913 and 1918.

The Ross was a Brass era automobile manufactured in Detroit, Michigan from 1915 to 1918 by the Ross Automobile Company.

The Shad-Wyck was an American automobile manufactured from 1917 until 1918 in Frankfort, Indiana.