The 1937 Grand Prix season was the fifth AIACR European Championship season. The championship was won by Rudolf Caracciola, driving for the Mercedes-Benz team. Caracciola won three of the five events that counted towards the championship, despite not taking part in the first race, the Belgian GP, as he and many other drivers of the German teams and Alfa's Scuderia Ferrari preferred to race in the US a week earlier for the Vanderbilt Cup.