The 1975 Suisse Open Gstaad was a men's tennis tournament played on outdoor clay courts in Gstaad, Switzerland. It was the 30th edition of the tournament and was held from 7 July through 13 July 1975. The tournament was part of the Grand Prix tennis circuit and categorized in Group B. Ken Rosewall won the singles title and the accompanying $8,000 prize money.[3][4]