Grands Prix between 1940 and 1945 occurred during World War II and so were limited to a very small number of events. There was no organised championship in these years. The majority of Grand Prix races during this period were run in America. The first post-war races were run in Paris on 9 September 1945, one week after the end of the war.

Wartime Grands Prix

1940–1942

Date	Name	Circuit	Winning drivers	Winning constructor	Report
1 January 1940	South Australian Hundred	Lobethal	Jack Phillips	Ford V8	Report
12 May 1940	Brazilian Grand Prix	Interlagos	Arthur Nascimento Jr	Alfa Romeo	Report
12 May 1940	Tripoli Grand Prix	Mellaha	Giuseppe Farina	Alfa Romeo	Report
23 May 1940	Targa Florio	Favorita Park	Luigi Villoresi	Maserati	Report
30 May 1940	Indianapolis 500	Indianapolis	Wilbur Shaw	Maserati	Report
24 August 1940	Springfield 100	Illinois	Rex Mays	Winfield	Report
2 September 1940	Syracuse 100	New York	Rex Mays		Report
30 May 1941	Indianapolis 500	Indianapolis	Floyd Davis Mauri Rose	Wetteroth	Report
24 August 1941	Milwaukee 100	Milwaukee	Rex Mays	Winfield	Report
2 September 1941	Syracuse 100	New York	Rex Mays		Report
28 September 1941	Rio de Janeiro Grand Prix	Gávea	Chico Landi	Alfa Romeo	Report
23 November 1941	Buenos Aires Grand Prix	Costanera	José Canziani		Report
January 1942					Report
5 April 1942	Grand Prix Vendimia	Mendoza Province	Adriano Malusardi		Report
3 May 1942	Santa Fe Grand Prix	Santa Fe	Oldemar Ramos		Report
18 July 1942	Autódromo Nacional	Barra De Santa Lucia	"Joe Ramsay"		Report

1943–1944

No Grand Prix races held

1945

Date	Name	Circuit	Winning drivers	Winning constructor	Report
9 September 1945	Coupe Robert Benoist	Bois de Boulogne	Aldo Gordini	Simca	Report
9 September 1945	Coupe de la Liberation	Bois de Boulogne	Henri Louveau	Maserati	Report
9 September 1945	Coupe des Prisonniers	Bois de Boulogne	Jean-Pierre Wimille	Bugatti	Report