Mack	1	From 1900	Brooklyn, New York City, New York, United States
	MAN	6	From 1915	Nuremberg, Bavaria, Germany
	Magirus-Deutz	3	1949-1983	Ulm, Baden-Württemberg, Germany
	Maruti	1	1983-?	India
	Mason	1	1922-1925	Flint, Michigan, United States
	Matra Sports	1	1966-1973	Paris, France
	Maxi	1	1977-1981	Cowley, Oxfordshire, England, United Kingdom
	Mazda	23	From 1931	Fuchū, Hiroshima, Japan
	MCI	1	From 1945	Winnipeg, Manitoba, Canada
	McLaughlin	1	1907-1918	Oshawa, Ontario, Canada
	Mercedes-Benz	33	From 1926	Stuttgart, Baden-Württemberg, Germany
	Mercury	16	1939-2001	Dearborn, Michigan, United States
	Metropolitan	1	1955-1961	Southfield, Michigan, United States
	Miller-Meteor	1	From 1956	Piqua, Ohio, United States
	Mini	5	From 1969	Longbridge, Birmingham, England United Kingdom
	Mitchell	1	1903-1923	Racine, Wisconsin, United States
	Mitsubishi	25	From 1917	Minato, Tokyo, Kantō, Japan
	MG	1	From 1924	Abingdon-on-Thames, Oxfordshire England, United Kingdom
	Morris	8	1913-1984	Cowley, Oxfordshire, England, United Kingdom
	Moskvich	6	?	Moscow, RSFSR, USSR
	Moskwitsch	1	?	Moscow, RSFSR, USSR
	Multicar	1	From 1926	Waltershausen, Gotha, Thuringia German Democratic Republic