William Edgar Dunk (born 10 December 1938) is an Australian professional golfer.
Dunk is the son of a greenkeeper at Gosford Golf Club on the NSW Central Coast.
Dunk won five Australian PGA Championships. In addition, he won the New Zealand Open. He won over 100 tournaments and broke over 80 course records, more than any other golfer in Australia. In 1970, he led the world's scoring averages from Jack Nicklaus with 70.21 for 110 rounds.
In 1970, Dunk set an Australian lowest-score record of 10 under par 60 at Merewether in the NBN-3 Tournament. His course records include 61 at Maitland, NSW, 63 at Hastings New Zealand, 64 at Victoria Golf Club (9 birdies, 9 pars), then the lowest score ever played in the Australian Open - 64 in the Texas Open, 65 at Royal Selangor, 66 at Royal Sydney Golf Club and 66 at Kingston Heath Golf Club. In 1971, at Coffs Harbour he surged to 11 under after only 12 holes. He finished with 63, nine under par on the card. In a span of 30 months between 1967 and 1969, he won 25 tournaments and set 25 course records. Dunk also won the Malaysian Open and the New Zealand Open.
Dunk and his wife Annette have three children. He settled on the New South Wales central coast.
PGA Tour of Australia wins (8)
PGA Tour of Australasia playoff record (2–2)
1962 Australian PGA Championship
1966 Australian PGA Championship, North Coast Open
1967 New South Wales Open, North Coast Open, Forbes Open
1969 New South Wales PGA, Brisbane Water Tournament
1970 New South Wales PGA, South Australian Open, North Coast Open, South Pacific Open
1971 Australian PGA Championship, New South Wales Open, North Coast Open, New South Wales PGA Foursomes Championship (with Graham Abbott)
1972 Queensland Open, Tasmanian Open
New Zealand Golf Circuit wins (7)
New Zealand Golf Circuit playoff record (0–2)
1989 Australian PGA Seniors Championship, New South Wales Seniors
1990 New South Wales Seniors, Mitsukoshi Seniors (Japan)