1931 Grand Prix season European Championship Grands Prix European Championship Grands Prix

| Name_ | Circuit | Date_ | Winning_drivers | Winning_constructor | Report |
|---|---|---|---|---|---|
| Italian Grand Prix | Monza | 24 May | Giuseppe Campari | Alfa Romeo | Report |
| Italian Grand Prix | Monza | 24 May | Tazio Nuvolari | Alfa Romeo | Report |
| French Grand Prix | Montlhéry | 21 June | Louis Chiron | Bugatti | Report |
| French Grand Prix | Montlhéry | 21 June | Achille Varzi | Bugatti | Report |
| Belgian Grand Prix | Spa-Francorchamps | 12 July | William Grover-Williams | Bugatti | Report |
| Belgian Grand Prix | Spa-Francorchamps | 12 July | Caberto Conelli | Bugatti | Report |