The 1975 Madrid Tennis Grand Prix, also known as the Trofeo Meliá, was a combined men's and women's tennis tournament played on outdoor clay courts at the Real Sociedad Hípica Española Club de Campo in Madrid, Spain.

The men's tournament was classified as Group A category and was part of the 1975 Grand Prix circuit.

It was the fourth edition of the tournament and was held from 6 October through 12 October 1975.

Jan Kodeš and Heidi Eisterlehner won the singles titles.

[3][4] Jan Kodeš defeated Adriano Panatta 5–7, 2–6, 7–6, 6–2, 6–3 Heidi Eisterlehner defeated Janice Metcalf 2–6, 6–1, 6–1 Jan Kodeš / Ilie Năstase defeated Juan Gisbert / Manuel Orantes 7–6, 4–6, 9–7