Heather Pamela McKay (née Blundell) (born 31 July 1941) is a retired Australian squash player, who is considered by many to be the greatest female player in the history of the game, and possibly also Australia's greatest-ever sportswoman. She dominated the women's squash game in the 1960s and 1970s, winning 16 consecutive British Open titles from 1962 to 1977, and capturing the inaugural women's World Open title in 1976, while remaining undefeated during that period. She was also a top-level player of other sports, including field hockey and racquetball.