| CALCATERRA | MOTOCICLETA | ITALIA | MILANO - MILANO | 1926 |
| CALCOTT | MOTOCICLETA | REINO UNIDO | COVENTRY - WARWICKSHIRE | 1896-1910 |
| CALIFORNIA (San Francisco) | BICIMOTOR | USA | SAN FRANCISCO - CALIFORNIA | 1901 |
| CALIFORNIA COMMUTER | TRICAR | USA | NEWPORT BEACH - CALIFORNIA | 1981 |
| CALIFORNIA MOTOR MOUNT (Sacramento) | MOTOR AUXILIAR | USA | SACRAMENTO - CALIFORNIA | 1950,s |
| CALLIHAN | TRICICLO | USA | WOONSOCKET - SOUTH DAKOTA | 1884 |
| CALTHORPE | MOTOCICLETA | REINO UNIDO | BIRMINGHAM - WARWICKSHIRE | 1895 |
| CALVERT | MOTOCICLETA | REINO UNIDO | LONDON - LONDON COUNTY | 1899 |
| CALVI | MOTOCICLETA | ITALIA | MILANO - MILANO | 1923 |
| CAMBER - BRIGHT & HAYLES | MOTOCICLETA | REINO UNIDO | SOUTHWARK - SURREY | 1908 |
| CAMBRA | MOTOCICLETA | ALEMANIA (REP. WEIMAR) | BERLIN - BERLIN | 1921 |
| CAMBRO | TRICICLO | REINO UNIDO | LONDON - LONDON | 1920 |
| CAMERON | MOTOCICLETA | AUSTRALIA | ADELAIDE - SOUTH AUSTRALIA | 1918 |
| CAMILO | MOTOCARRO | ESPAÑA | BARCELONA - BARCELONA | 1943 |
| CAMPBELL | MOTOCICLETA | AUSTRALIA | HOBART - TASMANIA | 1902 |
| CAMPION | MOTOCICLETA | REINO UNIDO | NOTTINGHAM - NOTTINGHAMSHIRE | 1901 |
| CAN-AM | MOTOCICLETA | CANADA | VALCOURT - QUÉBEC | 1973 |
| CANADIAN MOTORS | TRICICLO | CANADA | TORONTO - ONTARIO | 1897 |
| CANDA | TRICICLO | USA | CARTERET - NEW JERSEY | 1900 |
| CANOELET | SIDECAR | REINO UNIDO | BIRMINGHAM - WARWICKSHIRE | 1913-1919 |