William Edgar Dunk (born 10 December 1938) is an Australian professional golfer. Dunk was inducted as a life member of the Australasian Tour in 1996. Dunk won five Australian PGA Championships and the New Zealand Open. He won over 100 tournaments and broke over 80 course records, more than any other golfer in Australia, and in 1970 led the world's scoring averages from Jack Nicklaus with 70.21 for 110 rounds. Dunk is the son of a greenkeeper at Gosford Golf Club on the NSW Central Coast. He and his wife Annette have three children.