1931 Grand Prix season Non-championship Grands Prix Non-championship Grands Prix

| Name_ | Circuit | Date_ | Winning_driver | Winning_constructor | Report |
|---|---|---|---|---|---|
| Monza Grand Prix | Monza | 6 September | Luigi Fagioli | Maserati | Report |
| La Baule Grand Prix | La Baule | 13 September | William Grover-Williams | Bugatti | Report |
| Masaryk Grand Prix | Brno | 27 September | Louis Chiron | Bugatti | Report |
| Brignoles Grand Prix | Brignoles | 27 September | René Dreyfus | Bugatti | Report |
| Mountain Championship | Brooklands | 17 October | Henry Birkin | Maserati | Report |