The 1968 Trans-American Championship was the third running of the Sports Car Club of America's Trans-Am Series.
The season also marked the first time that an event was held outside of the United States, when a race at Mont-Tremblant brought Trans-Am into Quebec, Canada.
The championship was open to SCCA Sedans, which were required to conform with FIA Group 1 Series Production Touring Car or Group 2 Touring Car regulations.
Points were awarded to manufacturers according to the finishing positions in each race.
Only the highest-placed car scored points for the manufacturer and only the best 10 finishes counted towards the championship.