The 1955 Formula One season was the ninth season of FIA Formula One motor racing. It featured the sixth World Championship of Drivers, which was contested over seven races between 16 January and 11 September 1955. The season also included several non-championship races for Formula One cars.
Juan Manuel Fangio won his second consecutive World Championship title,[1] his third in total. This was the last championship for a Mercedes driver until 2014.
The season was coloured by tragedy. Two drivers were killed during the 1955 Indianapolis 500: Manny Ayulo and Bill Vukovich, winner of the two previous editions.[2] Italian Mario Alborghetti died at the non-championship Pau Grand Prix. Alberto Ascari, World Champion of 1952 and 1953, was killed while testing a Ferrari 750 Monza at Monza.[3][4][5] And ex-Formula One driver Pierre Levegh was killed in the 1955 Le Mans disaster, along with 83 spectators. This would lead to the cancellation of four F1 Grands Prix.