1938 Grand Prix season
The 1938 Grand Prix season was the sixth AIACR European Championship season. The championship was won by Rudolf Caracciola, driving for the Mercedes-Benz team. Caracciola won one of the four events that counted towards the championship.
Season review
European Championship Grands Prix
| Rd | Date | Name | Circuit | Winning drivers | Winning constructor | Report |
| 1 | 3 July |  French Grand Prix | Reims-Gueux |  Manfred von Brauchitsch | Mercedes-Benz | Report |
| 2 | 24 July | German Grand Prix | Nürburgring |  Richard Seaman | Mercedes-Benz | Report |
| 3 | 21 August |  Swiss Grand Prix | Bremgarten | Rudolf Caracciola | Mercedes-Benz | Report |
| 4 | 11 September |  Italian Grand Prix | Monza | Tazio Nuvolari | Auto Union | Report |
Non-championship Grands Prix
Grandes Épreuves are denoted by a yellow background.| Date | Name | Circuit | Winning driver | Winning constructor | Report |
| 10 April | Pau Grand Prix | Pau | René Dreyfus | Delahaye | Report |
| 18 April | Campbell Trophy | Brooklands |  Prince Bira | ERA | Report |
| 23 April |  Cork Grand Prix | Carrigrohane | René Dreyfus | Delahaye | Report |
| 15 May | Tripoli Grand Prix | Mellaha | Hermann Lang | Mercedes-Benz | Report |
| 29 May |  Gávea Nacional Circuit | Gávea | Arthur Nascimento Jr | Alfa Romeo | Report |
| 5 June |  Grand Prix des Frontières | Chimay | Maurice Trintignant | Bugatti | Report |
| 12 June | Rio de Janeiro Grand Prix | Gávea | Carlo Maria Pintacuda | Alfa Romeo | Report |
| 7 August | Coppa Ciano | Montenero | Hermann Lang | Mercedes-Benz | Report |
| 15 August | Coppa Acerbo | Pescara | Rudolf Caracciola | Mercedes-Benz | Report |
| 27 August | Junior Car Club 200 mile race | Brooklands | Johnny Wakefield | ERA | Report |
| 15 October | Mountain Championship | Brooklands | Raymond Mays | ERA | Report |
| 22 October | Donington Grand Prix | Donington Park | Tazio Nuvolari | Auto Union | Report |