The 1990 WTA Tour was the elite professional tennis circuit organized by the Women's Tennis Association (WTA) for the 1990 tennis season. The 1990 WTA Tour calendar comprised the four Grand Slam tournaments, the WTA Tour Championships and the WTA Tier I, Tier II, Tier III, Tier IV and Tier V events. ITF tournaments were not part of the WTA Tour, although they award points for the WTA World Ranking.