It was composed of the newly streamlined version of the Virginia Slims Circuit (which was now an 11-week tour of the United States) and the Woman's International Grand Prix.

[1][2] This is a calendar of all events which were part of either the Virginia Slims circuit or the Women's International Grand Prix in the year 1975, with player progression documented from the quarterfinals stage.

Also included are the Grand Slam tournaments, the 1975 Virginia Slims Championships, the 1975 Federation Cup and a number of events not affiliated with either tour.

They also include data for the Grand Slam tournaments and the year-end championships.

The table is sorted by: Below are the 1975 WTA year-end rankings (November 4, 1975) Singles competition: