| Round | Race | Date | Circuit | Winner |
|---|---|---|---|---|
| 1 | Argentine Grand Prix | 1955-01-16 | Autódromo Juan y Oscar Gálvez Buenos Aires, Argentina | Juan Fangio (Mercedes) |
| 2 | Monaco Grand Prix | 1955-05-22 | Circuit de Monaco Monte-Carlo, Monaco | Maurice Trintignant (Ferrari) |
| 3 | Indianapolis 500 | 1955-05-30 | Indianapolis Motor Speedway Indianapolis, USA | Bob Sweikert (Kurtis Kraft) |
| 4 | Belgian Grand Prix | 1955-06-05 | Circuit de Spa-Francorchamps Spa, Belgium | Juan Fangio (Mercedes) |
| 5 | Dutch Grand Prix | 1955-06-19 | Circuit Park Zandvoort Zandvoort, Netherlands | Juan Fangio (Mercedes) |
| 6 | British Grand Prix | 1955-07-16 | Aintree Liverpool, UK | Stirling Moss (Mercedes) |
| 7 | Italian Grand Prix | 1955-09-11 | Autodromo Nazionale di Monza Monza, Italy | Juan Fangio (Mercedes) |