1938 Grand Prix season Non-championship Grands Prix Non-championship Grands Prix

| Name_ | Circuit | Date_ | Winning_driver | Winning_constructor | Report |
|---|---|---|---|---|---|
| Pau Grand Prix | Pau | 10 April | René Dreyfus | Delahaye | Report |
| Campbell Trophy | Brooklands | 18 April | Prince Bira | ERA | Report |
| Cork Grand Prix | Carrigrohane | 23 April | René Dreyfus | Delahaye | Report |
| Tripoli Grand Prix | Mellaha | 15 May | Hermann Lang | Mercedes-Benz | Report |
| Gávea Nacional Circuit | Gávea | 29 May | Arthur Nascimento Jr | Alfa Romeo | Report |
| Grand Prix des Frontières | Chimay | 5 June | Maurice Trintignant | Bugatti | Report |
| Rio de Janeiro Grand Prix | Gávea | 12 June | Carlo Maria Pintacuda | Alfa Romeo | Report |
| Coppa Ciano | Montenero | 7 August | Hermann Lang | Mercedes-Benz | Report |
| Coppa Acerbo | Pescara | 15 August | Rudolf Caracciola | Mercedes-Benz | Report |