A lot. Currently there are 67 major brands being manufactured worldwide, and thousands that have gone out of business. In this country alone, there are 632 brands that no longer exist.
ABC (1906-1910)
ABC (1922)
Abbott-Detroit (1909-1919)
Able (1917-1919)
Ace (1920-1922)
Acme Motor Car Company (1903-1911)
Adams-Farwell (1899-1912)
Adelphia (1920)
Adria (1921-1922)
Aero Car (1921)
Aerocar (1946)
Airscoot (1947)
Airway (1949-1950)
Ajax (1914)
Ajax (1921)
Ajax (1925-1926)
Aland (1916-1917)
Albany (1907-1908)
Albatross (1939)
Alden-Sampson (1904,1911)
Aldo (1910-1911)
Alena Steam Car (1922)
All-Steel (1915-1916)
Allen (1913-1921)
Allen (1913-1914)
Allen Kingston (1907-1909)
Allis-Chalmers (before 1919)
Allstate (1952-1953)
Alpena (1910-1914)
Alsace (1920-1921)
Alter (1914-1916)
Altham (1896-1899)
Altman (1901)
Aluminum (1920-1922)
Amalgamated (1917-1919)
Amco (1919-1920)
America (1911)
American (1899)
American (1902-1903)
American (1911-1912)
American (1914)
American (1910-1924)
American Austin Car Company (1929-1934)
American Bantam (1937-1941)
American Chocolate (1903-1906)
American Electric (1899-1902)
American Electric (1913-1914)
American Junior (1916-1920)
American Juvenile Electric (1907)
American Locomotive Company (1906-1913)
American Mercedes (1904-1907)
American Motor Car Company (1906-1913)
American Motors Company aka AMC (1954-1987)
American Motors Incorporated (1946-1949)
American Napier (1904-1912)
American Simplex (1906-1915)
American Steam Car (1924-1931)
American Steamer (1922-1924)
American Tri-Car (1912)
American Truck (before 1919)
American Underslung (1905-1914)
American Waltham (1898-1899)
Ames (1910-1915)
Amplex (1906-1915)
Anahuac (1922)
Anchor Buggy (1910-1911)
Anderson (1916-1925)
Anhut Motor Car Company (1909-1910)
Ann Arbor (1911-1912)
Anna (cira 1912)
Ansted (1926-1927)
Ansted-Lexington (1922)
Apollo (1906-1907)
Apollo (1962-1964)
Apperson (1902-1926)
Apple (1917-1918)
Ardsley (1905-1906)
Argo (1914-1916)
Argo Electric (1912-1916)
Argonne (1919-1920)
Ariel (1905-1906)
Armstrong Electric (1885-1902)
Arrow (1914)
Astra (1920)
Atlas (1907-1913)
Atlantic (before 1919)
Auburn (1900-1936)
Aultman (1901)
Aurora (1957-1958)
Austin (1901-1921)
Auto Cub (1956)
Autocar Company (1900-1907)
Autoette (1910-1913)
Autoette (1948-1970)
Babcock Electric Carriage Company (1906-1912)
Badger (before 1919)
Baker Motor Vehicle (1899-1914)
Barley Motor Car Company (1916-1929)
Barnes (before 1919)
Bates Automobile Company (1903-1905)
Belmont (1916)
Benham (1914-1917)
Berg Automobile Company (1903-1905)
Bergdoll (before 1919)
Berwick Auto Car Company (1904)
Berkshire (before 1919)
Berllet (before 1919)
Bessemer (before 1919)
Biesel Motorette Company (1914)
Bill Dovell Motor Car Company (cira 1980s)
Binghamton Electric (1920)
Binney & Burnham (1901-1902)
Black Crow (before 1919)
Blood (1902-1905)
Blomstrom (before 1919)
Bobbi-Kar (1949-1950)
Borland (before 1919)
Bour-Davis (1915-1922)
Brew-Hatcher (1904-1905)
Brewster & Company (1896-1937)
Briggs-Detroiter (1912-1915)
Bricklin (1974-1976)
Brintell (before 1919)
Briscoe (1913-1923)
Brownikar (before 1919)
Broc Electric (before 1919)
Brockway Motor Company (1912-1977)
Brodesser (before 1919)
Brush Motor Car Company (1910-1913)
Bryan Steam Car (1918-1923)
Buckmobile (1903-1905)
Buffalo (1900-1902)
Buffalo Electric Vehicle Company (1912-1915)
Buffum (1901-1906)
Bush (1916-1924)
C.V.I. (1907-1908)
California (before 1919)
Cameron (before 1919)
Cannon (1902-1906)
Car (before 1919)
Car de Luxe (1906-1910)
Car-Nation aka (Carnation) (1912-1915)
Carhartt (1910-1911)
Carter Twin-Engine (1907-1908)
Cartercar (1906-1916)
Carthage (before 1919)
Cavac (1910)
Century Motor Company (1911-1913)
Chadwick (before 1919)
Chalmers-Detroit (1908-1910)
Chalmers (1910-1923)
Chandler Motor Car (1913-1929)
Checker Motors Corporation (1922-1982)
Chief (before 1919)
Church-Field (1912-1913)
Cino (before 1919)
Cinco (before 1919)
Citicar (1974-1976)
Clark (before 1919)
Clark-Carter Automobile Company (1909-1911)
Cleveland (before 1919)
Coates-Goshen (1908-1910)
Coats Steam Car (1922-1923)
Coey (1913-1917)
Colby (before 1919)
Colburn (before 1919)
Colley (before 1919)
Columbia Automobile Company (1899-1910)
Columbia Motors (1917-1924)
Columbus Electric (before 1919)
Connersville (before 1919)
Continental (1933-1934)
Compound (1904)
Corbin (1904-1912)
Corbin Motors (1999-2003)
Corbitt (before 1919)
Cord Automobile (1929-1932,1936-1937)
Correja (1908-1915)
Courier (1909-1911)
Courier-Clermont (before 1919)
Covert (1904)
Coyote (1909-1910)
Craig-Toledo (before 1919)
Crane & Breed (1912-1917)
Crawford (cira 1910-1923)
Crescent (before 1919)
Crestmobile (1904)
Cricket (1914)
Crosley (1939-1952)
Crow (before 1919)
Crown (1905)
Croxton (before 1919)
Croxton-Keeton (before 1919)
Cutting Motor Car Company (1911-1912)
DAC (1922-1923)
Dagmar (1922-1927)
Dale (1974)
Dart (before 1919)
Davis (1914)
Davis Steam Car (1921)
Davis Totem (1921-1922)
Day (1911-1914)
Dayton Electric (1911-1915)
Deal (1905-1911)
Dearborne-Detroit (before 1919)
De La Vergne (1895-1896)
De Luxe (1910)
De Mot (1910)
De Schaum (1908-1909)
De Tamble (before 1919)
De Vaux (1931)
De Vaux Continental (1932-1934)
DeSoto (1928-1961)
DeWitt Motor Company (cira 1908-1910)
Detroit (1904-1908)
Detroit (1904)
Detroit Cyclecar (1913-1914)
Detroit Electric (1907-1939)
Detroit Steam Motors Corporation (1922)
Detroit-Dearborn (1910-1911)
Detroit-Oxford (1905-1906)
Diamond T Motor Car Company (1905-1911)
Diana Motors Company (1925-1928)
Dile (1914-1916)
Dingfelder (1903)
Doble Steam Car (1922-1931)
Dodge (1914-1915)
Dodgeson Motors (1926)
Dolson (1904-1907)
Dorris Motors Corporation (1906-1926)
Dort (1915-1924)
Downing-Detroit (1913-1915)
Dragon Automobile Company (1906-1908)
Durant Motors Incoporated (1921-1931)
Du Pont Motors (1919-1931)
Dual-Ghia (1956-1958)
Dudley Bug (1913-1915)
Duer (before 1919)
Duesenberg (1913-1937)
Durant Motors (1921-1931)
Duryea Motor Wagon Company (1893-1917)
Durocar (before 1919)
E-M-F Company (1909-1912)
Eagle (1988-1998)
Earl (1921-1923)
Eclipse (before 1919)
Edwards (before 1919)
Elcar (1915-1931)
Eldredge (1903-1906)
Electric Vehicle Company (1897-1907)
Elk (before 1919)
Elmore Manufacturing Company (1893-1912)
Empire (1901-1902)
Empire (1910-1919)
Empire Steam Car (1925-1927)
Empire Steamer (1898-1909)
Endurance Steam Car (1922-1924)
Engler (1914-1915)
Entyre (1910-1911)
Eshelman (1953-1961)
Essex (1922-1932)
Eureka (1900)
Eureka (1907)
Evertt (before 1919)
Everitt (1909-1912)
Ewing (before 1919)
Excel (1914)
Exner Revival Cars (1963-1966)
F.A.L. (1907)
Fal-Car (1909-1913)
Faulkner-Blanchard (1910)
Fiberfab (cira 1960s)
Fina-Sport (1953-1954)
Findley (before 1919)
Firestone Columbus (before 1919)
Fischer (1914)
Flanders (before 1919)
Flint (1923-1927)
Flyer (1913-1914)
Franklin (1902-1934)
Frazer (1946-1951)
Fredonia (1904)
Friend (1920-1921)
Fuller (1907-1909)
Gadabout (1913-1915)
Gaeth (1902-1911)
Gardner (1920-1931)
Garford (before 1919)
Gas-au-Lec (1905-1906)
Gaslight (1960-cira 1961)
Gasmobile (1899-1902)
Gaylord (1911-1912)
Gem (1917-1919)
Geo (1988-1998)
GJG (1909-1914)
Glasspar (1949-1953)
Gleason (before 1919)
Glide (before 1919)
Globe Four (1921-1922)
Grabowsky (before 1919)
Graham-Paige (1927-1940)
Gramm (before 1919)
Grant (1913-1922)
Gray (1922-1926)
Gray Light Car (1920)
Great Eagle (1910-1918)
Great Smith (1902-1912)
Great Southern (1910-1914)
Great Western (before 1919)
Greenleaf (1902)
Grinnell (1910-1913)
Griswold (1907)
Grout (1904)
Gyroscope (1908-1909)
Hackett (1916-1919)
Halladay (before 1919)
Hammer (1905-1906)
Hammer-Sommer (1902-1904)
Handley-Knight (1921-1923)
Harrison (1905-1907)
Harroun (1917-1922)
Hart-Kraft (before 1919)
Havers Motor Car Company (1908-1914)
Hawk (1914)
Haynes Automobile Company (1905-1924)
Haynes-Apperson (1896-1905)
Heine-Velox (1903-1908,1921-1923)
Henderson (before 1919)
Henry (1910-1912)
Herff-Brooks Corporation (1915-1916)
Herreshoff (1909-1914)
Hewitt-Lindstrom (1900-1901)
Hidley Steam Car (1901)
Hitchcock (1909)
Hobbie Accessible (1908-1909)
Hoffman (1931)
Hol-Tan (1908)
Holley Motor Car (1900-1904)
Hollier (1915-1921)
Holsman Automobile (1901-1911)
Houpt (before 1919)
Hudson (1901-1902)
Hudson Motor Car Company (1909-1954)
Huffman (1919-1925)
Hupp Motor Company (1909-1940)
Hupp-Yates (1911-1916)
Imperial (before 1919)
Indiana (before 1919)
International Harvester (1907-1975)
JPL (1913)
Jacquet Flyer (1921)
Jaeger (1932-1933)
Janney (1906)
Jeffery (1902-1917)
Jenkins (before 1919)
Jewell (before 1919)
Jewett (1923-1926)
Johnson (before 1919)
Jordan Motor Car Company (1916-1931)
Junior R (1924)
K-R-I-T Motor Car Company (1909-1916)
Kaiser Jeep (1963-1970)
Kaiser-Fraiser Corporation (1945-1953)
Kaiser Motors Corporation (1953-1955)
Keeton (before 1919)
Keller (1948-1950)
Kelly-Springfield (before 1919)
Kelsey (before 1919)
Kent's Pacemaker (1900)
Kermath (1907-1908)
Kess-Line 8 (1922)
Kessler (1921-1922)
Keystone (1899-1900)
Keystone (1914-1915)
King-Remick (1910)
Kissel Motor Car Company (1906-1930)
Kline (before 1919)
Knight Engine (1911)
Knox Automobile Company (1900-1914)
Komet (1911)
Koppin (1915)
Krall (before 1919)
Krit (1909-1916)
L.P.C. (before 1919)
Lad's Car (1912-1914)
LaFayette Motors (1919-1924)
Lambert (1905-1916)
Lansden (before 1919)
LaSalle (1927-1940)
Lenawee (1903-1904)
Lewis (before 1919)
Lexington (1910-1927)
Lexon (before 1919)
Liberty Motor Car (1916-1924)
Light (1914)
Lincoln (1914)
Lion (1909-1912)
Liquid Air (1899-1902)
Little (1911-1913)
Little Detroit Speedster (1913-1914)
Little Princess (1913-1914)
Little Six (before 1919)
Locomobile Company of America (1899-1929)
Logan (before 1919)
Lone Star (1920-1922)
Lorraine (1920-1922)
Lozier Motor Company (1900-1915)
LuLu (1914)
Luverne (1904-1917)
Lyons Atlas (1913-1915)
MPM (1914-1915)
Malcolm Jones (1914-1915)
Marathon Motor Works (1906-1914)
Marble-Swift (1903-1905)
Marion (1901)
Marion (1916-1918)
Marion Flyer (1910)
Marion-Handley (1916-1919)
Marmon (1902-1933)
Marron (before 1919)
Marquette (1930)
Marr (1903-1904)
Marvel (1907)
Maryland (1907-1910)
Mason (1911-1915)
Mather (before 1919)
Matheson (1903-1912)
Maxwell-Briscoe (1904-1913)
Maxwell (1913-1925)
Maytag-Mason (before 1919)
McFarlan Automobile (1909-1928)
Mclntyre (before 1919)
Menominee (1915)
Mercer (1909-1919)
Merchant (before 1919)
Mercury (1914)
Meteor (before 1919)
Michigan (1903-1908)
Michigan (1908-1914)
Middleby (before 1919)
Midland (before 1919)
Mier (before 1919)
Miller (1912-1913)
Milwaukee (before 1919)
Moline-Knight (1904-1919)
Monarch (1914-1917)
Moon Motor Car (1905-1930)
Mora (before 1919)
Morris & Salom (1895-1897)
Mors
Motor Bob (1914)
Moyer (before 1919)
Muntz Car Company (1951-1954)
Nance (before 1919)
Nash-Healey (1951-1954)
Nash Motors (1916-1957)
National Motor Vehicle Company (1900-1924)
Nelson (1917-1921)
New Era Motors Company (1929-1930)
Nielson (1907)
Northern Manufacturing Company (1904)
North Western (before 1919)
Nu-Klea Starlite (1959-1960)
Nyberg Automobile (1911-1914)
O-We-Go (1914)
Oakland (1907-1909)
Ohio (before 1919)
Oldsmobile (1897-2004)
Oliver (before 1919)
Olympian (1917-1921)
Omaha (before 1919)
Orient (1902-1908)
Orlo (1904)
Orson (before 1919)
Otto-mobile (before 1919)
Overholt (before 1919)
Overland Automobile(1903-1912)
Owen Magnetic (1915-1922)
Packard Motor Car Company (1899-1958)
Paige (1908-1927)
Palmer-Singer (before 1919)
Parry (before 1919)
Peabody (before 1919)
Peerless (1900-1933)
Penn (1910-1913)
Pennsylvania (before 1919)
Peru (before 1919)
Petrel (before 1919)
Phelps Motor Vehicle (1903-1905)
Piedmont (1917)
Pierce-Arrow (1900-1938)
Pierce-Racine (before 1919)
Piggins (1909)
Pilgrim of Providence (1911)
Pioneer (before 1919)
Pittsburgh Six (1908-1910)
Plass (1897)
Playboy Motor Car Corporation (1947-1951)
Plymouth (1928-2001)
Pope-Hartford (before 1919)
Pope-Robinson (1899-1901)
Pope-Toledo (1903-1909)
Pope-Tribune (before 1919)
Pope-Waverley (1903-1908)
Poss (before 1919)
Powell Motor Company (1930s-1960s)
Pratt-Elkhart (before 1919)
Premier Motor Manufacturing (1903-1926)
Pungs Finch (1904-1908)
Queen (1904-1907)
Quick (1899-1900)
Quinby (1899)
Randolph (before 1919)
Rainier (before 1919)
Rambler (1900-1914)
Rapid (before 1919)
Rayfield (1911-1915)
R.C.H. (before 1919)
Reading (before 1919)
Reber (1902-1903)
Reed (before 1919)
Reliable-Dayton (before 1919)
Reliance (before 1919)
Republic (before 1919)
REO Motor Car Company (1905-1975)
Rickenbacker (1922-1927)
Ricketts (before 1919)
Rider-Lewis (before 1919)
Riker Motor Vehicle Company (1898-1901)
Roosevelt (1929-1930)
Ross (1905-1909)
Ross (1915-1918)
Royal Motor Car (1904)
Royal Tourist (before 1919)
Rugby (1920s)
Rutenber Motor Company (cira 1901-1902)
Ruxton (1929-1930)
Sampson (1904,1911)
Sandusky(before 1919)
Saxon (1913-1923)
Schacht (1904-1940)
Schaum (1901-1905)
Scripps-Booth (1913-1923)
Selden Motor Vehicle Company (1909-1912)
S.G.V. (before 1919)
Shad-Wyck (1917-1923)
Shawmobile (1908-1930)
Sibley (before 1919)
Simplo (1908-1909)
Sinclair-Scott (1904-cira 1907)
Single Center (1907-1908)
Sintz (1899-1904)
Skene (1900-1901)
Smith Automobile Company (1902-1912)
Smith Flyer (1915-1919)
Sommer (before 1919)
Southern (before 1919)
Spaulding (1910-1916)
Speedwell Motor Car Company (1907-1914)
Springfield (before 1919)
St. Louis Motor Company (1899-1907)
Standard (1904-1908)
Standard (1912-1923)
Standard Six (1909-1910)
Standard Steam Car (1920-1921)
Stanley Steamer (1897-1927)
Stanwood (1920-1922)
Star (1922-1928)
Staver (1907-1914)
Steamobile (1900-1902)
Stearns (1898-1925)
Stearns-Knight (1925-1929)
Sterling (before 1919)
Stevens-Duryea (1901-1915,1919-1927)
Stewart-Coats (1922)
Stoddard-Dayton (1905-1913)
Stout Scarab (1932-1946)
Streco Turnpike Cruiser (1958-1985)
Studebaker (1902-1966)
Studebaker-Packard Corporation (1954-1962)
Stutz Motor Company (1911-1935)
Stutz Motor Car of America (1968-1987)
Suburban (before 1919)
Sultan (before 1919)
Sun (1916-1922)
Talbot (1903-1986)
Templar (1917-1924)
Terraplane (1932-1939)
Thomas B. Jeffery Company (1902-1916)
Thomas Flyer (1902-1919)
Tincher (1903-1909)
Tourist (before 1919)
Traveler (before 1919)
Tucker Corporation (1946-1949)
Twombly (1913-1915)
US Automobile (1899-1901)
Union (1902-1905)
United States Motor Company (1910-1913)
Velie Model 34 Touring 1920
Van Dyke (before 1919)
Van Wagoner (1899-1900)
Velie (1908-1929)
Victor-Thomas-Detroit (before 1919)
Viking (1929-1931)
Virginian (1911-1912)
Wagenhalls (before 1919)
Ware Steam Wagon (1861-1867)
Wahl (before 1919)
Waltham-Orient (before 1919)
Washington (before 1919)
Waverley Electric (before 1919)
Wayne (1904)
Welch-Detroit (before 1919)
Welch-Marquette (before 1919)
Welch-Pontiac (before 1919)
Westcott (1912-1925)
White Motor Company (1902-1981)
Whiting (before 1919)
Wills Sainte Claire (1921-1927)
Willys (1908-1912)
Willys-Knight (1914-1933)
Willys-Overland Motors (1912-1953)
Willys Motor Company (1953-1963)
Wilson (1903-1905)
Windsor (1929-1930)
Winton Motor Carriage Company (1897-1924)
Woods Motor Vehicle (1899-1916)
Woodworth (before 1919)
Xenia (1914)
Yale (before 1919)
Zip (before 1919)
Zabardust