The 1966 Formula One season was the 20th season of FIA Formula One motor racing. It featured the 17th World Championship of Drivers, the 9th International Cup for F1 Manufacturers, and four non-championship races open to Formula One cars. The World Championship was contested over nine races between 22 May and 23 October 1966.
Jack Brabham won the Drivers' Championship in a Brabham-Repco. It was his third and last championship, and first since 1960, setting the record for the largest gap between World Championship wins in the history of the sport at six years but would be broken in 1984 with Niki Lauda taking his third championship seven years after his second. Brabham was also awarded the International Cup for F1 Manufacturers, their first title.