The 1974 Trans-Am Series was the ninth running of the Sports Car Club of America's premier series. It began on May 4 and ran for only three rounds, including the Six Hours of Watkins Glen.
| Round | Date | Circuit | Duration | Winning driver | Winning vehicle |
|---|---|---|---|---|---|
| 1 | May 4 | Lime Rock | 200 miles | | Porsche Carrera |
| 2 | July 13 | Watkins Glen | Six hours | | Matra-Simca |
| 3 | July 27 | Road America | 200 miles | | Porsche Carrera |