This list of 1940 motorsport champions is a list of national or international auto racing series with a Championship decided by the points or positions earned by a driver from multiple races.
Open wheel racing Series Driver Season article AAA National Championship Rex Mays 1940 AAA Championship Car season
Stock car racing Series Driver Season article Turismo Carretera Juan Manuel Fangio 1940 Turismo Carretera
See also List of motorsport championships Auto racing