Geau Vada-Tau (born 3 May 1957) is a Papua New Guinean Lawn Bowler. Tau stunned the bowling world in 1990 when she won the gold medal in the singles at the Auckland Commonwealth Games without losing a game. She became a national heroine because this was the first Commonwealth Games Gold Medal ever won by Papua New Guinean. Tau plays for the Boroko Club in Port Moresby.