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] Ken Rosewall defeated Karl Meiler 6–4, 6–4, 6–3 Jürgen Fassbender / Hans-Jürgen Pohmann defeated Colin Dowdeswell / Ken Rosewall 6–4, 9–7, 6–1