| CLEBANT | TRICAR | FRANCIA | - | 19?? |
| CLEMENT (London) | MOTOR | REINO UNIDO | LONDON - LONDON | 1922 |
| CLEMENT-GARRARD | MOTOCICLETA | REINO UNIDO | BIRMINGHAM - WARWICKSHIRE | 1902 |
| CLÉMENT-GLADIATOR | MOTOCICLETA | FRANCIA | LEVALLOIS-PERRET - LE PREÉ-SAINT-GERVAIS - SEINE | 1896 |
| CLERI | MOTOCICLETA | ARGENTINA | SAN FRANCISCO (RA) - CÓRDOBA (RA) | 1959 |
| CLEVELAND (Cleveland) | MOTOCICLETA | USA | HARTFORD - CLEVELAND - CONNECTICUT - OHIO | 1902 |
| CLEVELAND (Middlesborough) | MOTOCICLETA | REINO UNIDO | MIDDLESBROUGH - YORKSHIRE | 1911 |
| CLEVER | TRICAR | REINO UNIDO | BATH - SOMERSET | 2002 |
| CLEWSTROKA | MOTOCICLETA | REINO UNIDO | BOLTON - LANCASHIRE | 1971 |
| CLIFTON & DE GUERIN | MOTOCICLETA | REINO UNIDO | BATH - SOMERSET | 1929 |
| CLIFTON (Adelaide) | MOTOCICLETA | AUSTRALIA | ADELAIDE - SOUTH AUSTRALIA | 1916 |
| CLIMAX | MOTOR | REINO UNIDO | COVENTRY - WARWICKSHIRE | 1931? |
| CLINTON (Maquoketa) | MOTOR | USA | MAQUOKETA - IOWA | 1946 |
| CLIPIC | MOTOCICLETA | ESPAÑA | OLOT - GIRONA | 1992 - 1995 |
| CLIPPER (GB) | ESCÚTER | REINO UNIDO | - | 1948 |
| CLIPPER (Lons-le-Saunier) | CICLOMOTOR | FRANCIA | LONS-le-SAUNIER - JURA | 1950 |
| CLIPPER (Nagoya) | MOTOCICLETA | JAPÓN | NAGOYA - AICHI | 1952 |
| CLIPPER (Newcastle (NSW)) | MOTOCICLETA | AUSTRALIA | NEW HAMBURG (Wilmot Township) - NEW SOUTH WALES | 1913 |
| CLOUMOBIL | TRICICLO | ALEMANIA IMPERIAL | CHARLOTTENBURG - BRANDENBURG | 1906 |
| CLÚA | MOTOCICLETA | ESPAÑA | BARCELONA - BARCELONA | 1924 - 1949 |