This article documents the events in motorsport that happened in the 1970s.
- The IMSA GT Championship begins in 1971
- The Trans Am Series declines, as the muscle car sees its demise after the Oil Crisis. It eventually adopts an IMSA GTO format.
- The Can Am Series folds by mid decade due to the Oil Crisis and dominance of McLaren and Chevrolet. It is revived in 1977 based on Formula 5000, but folds shortly afterward.
- Formula 5000 continues to be popular until mid-decade, when it declines into the basis for the new Can-Am
- The Grand National becomes the Winston Cup Series after a purchase from Winston Cigarettes. Due to the Oil Crisis it is forced to allow even more modifications to its cars, beginning the departure from its strictly stock roots.
- Championship Automobile Racing Teams is established, creating the first IndyCar Series.
- The beginning of NASCAR legend Dale Earnhardt's long career.
- The Brazilian Grand Prix is first held.
- The World Rally Championship is established
- The BMW 3-Series is introduced
- The Swedish Grand Prix is first held