| Cadillac | Detroit (USA) | 1902 - | | |
| Calcott | Coventry (GB) | 1913 – 1926 | | |
| Calthorpe | Birmingham (GB) | 1904 – 1932 | | |
| Canello-Dürkopp | (F) | | | |
| Carden | Teddington + Ascot (GB) | 1912 – 1925 | | |
| Caruna | Spreitenbach (CH) | 1966 - 2010 | www.caruna.ch
| |
| Case | Racine (USA) | 1910 – 1927 | | |
| Cegga | Aigle (CH) | 1960 – 1970 | | |
| Ceirano | Turin (I) | 1898 – 1924 | | |
| Cemsa | Saronno (I) | 1946 – 1949 | | |
| CGV Charron | Puteaux (F) | 1901 – 1930 | | |
| Chadwick | Philadelphia (USA) | 1905 – 1907 | | |
| Chadwick | Pittsburg (USA) | 1907 – 1916 | | |
| Chalmers | Detroit (USA) | 1908 – 1924 | | |
| Chambers | Belfast (IRL) | 1904 – 1925 | | |
| Champion | Herrlingen/Paderborn (D) | 1948 – 1958 | | |
| Chandler | Cleveland (USA) | 1913 – 1929 | | |
| Checker | Kalamazoo (USA) | 1923 – 1982 | | |
| Chenard + Walcker | Asnières/Gennevilliers (F) | 1901 – 1946 | | |
| Cheetah | Gland (CH) | 1974 – 1984 | | |
| Chitty-Bang-Bang (Zborowski) | (GB) | | | |
| Chevrolet | Detroit (USA) | 1911 | | |
| Chiribiri | Turin (I) | 1910 – 1928 | | |
| Christie | New York (USA) | 1904 – 1910 | | |
| Chrysler | Detroit (USA) | 1924 - | | |
| Cisitalia | Turin (I) | 1946 – 1965 | | |
| Citroën | Paris (F) | 1919 - | | |
| CLAN | Washington (GB) | 1971 – 1974 | | |
| Claveau | Paris (F) | 1923 – 1950 | | |
| Clement-Bayard | Levallois Perret/Mézières (F) | 1903 – 1922 | | |
| Clenet | Santa Barbara (USA) | 1976 – 1982 | | |
| Club | (D) | | | |
| Cluley | Coventry (GB) | 1922 – 1928 | | |
| Clyno | Wolverhampton (GB) | 1922 – 1929 | | |
| CMN | Mailand (I) | 1919 – 1923 | | |
| Cole | Indianapolis (USA) | 1909 – 1925 | | |
| Colombo | Mailand (I) | 1922 – 1924 | | |
| Columbia | (USA) | | | |
| Cooper | (GB) | 1948 | | |
| Cooper | (GB) | | | |
| Cooper | (GB) | | | |
| Corat | Turin (I) | 1946 | | |
| Corbin | New Britain (USA) | 1904 – 1912 | | |
| Cord | Auburn (USA) | 1929 – 1937 | | |
| Corre-La Licorne | Levallois/Neuilly/Courbevoie (F) | 1899 – 1950 | | |
| Cottereau | (F) | 1898 – 1910 | | |
| Cottin-Desgouttes | Lyon (F) | 1904 – 1933 | | |
| Covini Ferrucio | Castel S. Giovanni (I) | 1978 - | | |
| Craig-Dörwald | (GB) | 1902 – 1912 | | |
| Crosley | Marion (USA) | 1939 – 1942 | | |
| Crossley | Manchester (GB) | 1904 – 1937 | | |
| Crouch | (GB) | 1912 – 1928 | | |
| Cunningham | Rochester, New York (USA) | 1907 – 1937 | | |
| Cunningham | West Palm Beach (USA) | 1951 – 1955 | | |
| Cyclon (Cyklon/Cyklonette) | Berlin/Mylau (D) | 1907 – 1923 | | |
| DAF | Eindhoven (NL) | 1958 – 1975 | | |
| Daimler | Coventry (GB) | 1897 - | | |
| Daino | Cremona (I) | 1923 – 1924 | | |
| Dainotti | Pavia (I) | 1922 – 1923 | | |
| Daniels | Reading (USA) | 1915 – 1924 | | |
| Darmont | Courbevoie (F) | 1920 – 1939 | | |
| Darracq | Suresnes (F) | 1896 – 1929 | | |
| Darracq Italiana | Neapel (I) | 1906 – 1910 | | |
| David | Barcelona (E) | 1914 – 1957 | | |
| Davis | Van Nuys (USA) | 1947 – 1949 | | |
| Del Mar | San Diego (USA) | 1949 | | |
| DB (Deutsch Bonnet) | Champigny-sur-Marne (F) | 1938 – 1961 | | |
| Deasy (Siddeley-Deasy) | Coventry (GB) | 1906 – 1919 | | |
| Decauville | (F) | 1898 – 1910 | | |
| De Dion-Bouton | Puteaux (F) | 1883 – 1932 | | |
| De Lorean | Irland / USA | | | |
| Deemster | London (GB) | 1914 – 1924 | | |
| Deguingand | (F) | 1917 – 1939 | | |
| Delage | Courbevoie (F) | 1905 – 1954 | | |
| Delahaye | Tours/Paris (F) | 1894 – 1954 | | |
| Delaugère | (F) | 1901 – 1926 | | |
| Delaunay-Belleville | St. Denis (F) | 1904 – 1950 | | |
| Della Ferrera | Turin (I) | 1924 | | |
| Dellow | Birmingham (GB) | 1947 – 1959 | | |
| De Luca Daimler | Neapel (I) | 1906 – 1910 | | |
| De Soto | Detroit (USA) | 1928 – 1960 | | |
| De Tomaso | Modena (I) | 1959 - | | |
| Detroit Electric | Detroit (USA) | 1907 – 1938 | | |
| Deutz | Köln (D) | 1907 – 1911 | | |
| De Vecchi | Mailand (I) | 1905 – 1917 | | |
| DFP | Courbevoie (F) | 1906 – 1926 | | |
| Diatto | Turin (I) | 1905 – 1955 | | |
| Diabolo | (D) | | | |
| Diavolino | Oberkulm (CH) | 1984 – 1986 | | |
| Diba | Basel (CH) | 1970 | | |
| Diederichs | | | | |
| Dinos | (D) | 1921 – 1924 | | |
| DIXI | Eisenach (D) | 1904 – 1928 | | |
| DKW | Berlin-Spandau (D) | 1928 – 1966 | | |
| Dobelli | Rom (I) | 1903 – 1904 | | |
| Doble | Emeryville (USA) | 1914 – 1932 | | |
| Dodge | Detroit (USA) | 1914 - | | |
| Donnet (Donnet-Zedel) | (F) | 1924 – 1931 | | |
| DORA | Genua (I) | 1906 – 1910 | | |
| Dort | Flint (USA) | 1915 – 1924 | | |
| DRB | Italien | 1966 - | | |
| Dual & Turconi | Mailand (I) | 1899 – 1901 | | |
| Duesenberg | Indianapolis (USA) | 1920 – 1937 | | |
| Dufaux | Genf (CH) | 1905 | | |
| Du Pont | Moore-Pennsylvania (USA) | 1920 – 1932 | | |
| Dupressior | | | | |
| Durant | (USA) | 1921 – 1932 | | |
| Dürkopp | Bielefeld (D) | 1898 – 1927 | | |
| Duryea | (USA) | 1892 – 1908 | | |
| Dux | Leipzig-Waren (D) | 1905 – 1926 | | |
| D-Wagen | (D) | | | |
| D’Yrsan | Asnières (F) | 1923 – 1930 | | |
| Edsel | Detroit (USA) | 1958 – 1960 | | |
| Egg (Egg & Egli) | (CH) | 1893 - | | |
| EGO | Berlin (D) | 1921 – 1927 | | |
| EHP | Courbevoie (F) | 1921 – 1929 | | |
| Ehrhardt (Ehrhardt-Szawe) | Zella-St. Blasii/Düsseldorf (D) | 1905 – 1925 | | |
| EIA | Mailand (I) | 1928 | | |
| Elite | Brand-Erbisdorf | 1914 – 1928 | | |
| Elizalde | Barcelona (E) | 1914 – 1928 | | |
| ELVA | Bexhill-on-Sea (GB) | 1955 – 1968 | | |
| Emanuel | Turin (I) | 1898 – 1904 | | |
| EMW | Eisenach (D) | 1951 – 1955 | | |
| Enfield-Allday | Sparkbrook (GB) | 1919 – 1925 | | |
| Enzmann | Schüpfheim (CH) | 1953 - | | |
| Eos | (D) | | | |
| E.R.A. | (GB) | 1934 – 1939 | | |
| Erskine | South Bend (USA) | 1926 – 1930 | | |
| Espana | Barcelona (E) | 1917 – 1928 | | |
| Essex | Detroit (USA) | 1918 – 1932 | | |
| Excalibur | Milwaukee (USA) | 1964 - | | |
| Excelsior | Brüssel (B) | 1903 – 1932 | | |
| Exor | (D) | | | |
| Express | (D) | 1901 – 1910 | | |
| Eysink | (NL) | 1899 – 1920 | | |
