1955 FIA Formula One World Championship
- Drivers' champion
- Juan Manuel Fangio
- Team
- Mercedes
- Points
- 40
- Runner-up
- Sir Stirling Moss — 23
- Margin
- 17
- Constructors' champion
- —
- Rounds
- 7
- Engine formula
- 2.5 L naturally aspirated
- Tyres
- Pirelli, Englebert, Dunlop, Firestone
Season truncated after the Le Mans disaster; the French, German, Swiss and Spanish rounds were cancelled. Switzerland has never held a championship race since.
Races
| Rd | Grand Prix | Circuit | Dates | Winner | Constructor | Pole | Fastest lap |
|---|---|---|---|---|---|---|---|
| 1 | Argentine Grand Prix | Autodromo Oscar Galvez | — | Juan Manuel Fangio | Mercedes | Jose Froilan Gonzalez | Juan Manuel Fangio |
| 2 | Monaco Grand Prix | Circuit de Monaco | — | Maurice Trintignant | Ferrari | Juan Manuel Fangio | Juan Manuel Fangio |
| 3 | Indianapolis 500 | Indianapolis Motor Speedway | — | Bob Sweikert | — | Jerry Hoyt | Bill Vukovich |
| 4 | Belgian Grand Prix | Circuit de Spa-Francorchamps | — | Juan Manuel Fangio | Mercedes | Eugenio Castellotti | Juan Manuel Fangio |
| 5 | Dutch Grand Prix | Circuit Zandvoort | — | Juan Manuel Fangio | Mercedes | Juan Manuel Fangio | Roberto Mieres |
| 6 | British Grand Prix | Aintree | — | Sir Stirling Moss | Mercedes | Sir Stirling Moss | Sir Stirling Moss |
| 7 | Italian Grand Prix | Autodromo Nazionale Monza | — | Juan Manuel Fangio | Mercedes | Juan Manuel Fangio | Sir Stirling Moss |
Championship standings after round 7
| Pos | Driver | Team | Points |
|---|---|---|---|
| 1 | Juan Manuel Fangio | — | 40 |
| 2 | Sir Stirling Moss | — | 23 |
| 3 | Eugenio Castellotti | — | 12 |
| 4 | Maurice Trintignant | — | 11.33 |
| 5 | Giuseppe 'Nino' Farina | — | 10.33 |
| 6 | Piero Taruffi | — | 9 |
| 7 | Bob Sweikert | — | 8 |
| 8 | Roberto Mieres | — | 7 |
| 9 | Jean Behra | — | 6 |
| 10 | Luigi Musso | — | 6 |
| 11 | Karl Kling | — | 5 |
| 12 | Jimmy Davies | — | 4 |