This list of 1955 motorsport champions is a list of national or international auto racing series with a Championship decided by the points or positions earned by a driver from multiple races.
| Series | Driver | Season article | |
|---|---|---|---|
| Formula One World Championship |  Juan Manuel Fangio | 1955 Formula One season | |
| AAA National Championship |  Bob Sweikert | 1955 AAA Championship Car season | |
| BRSCC British Formula Three Championship |  Jim Russell |
| Series | Driver | Season article |
|---|---|---|
| World Sportscar Championship | Mercedes-Benz | 1955 World Sportscar Championship season |
| SCCA National Sports Car Championship | C Modified: Sherwood Johnston | 1955 SCCA National Sports Car Championship season |
| D Modified: Phil Hill |
