William Edgar Dunk (born 10 December 1938)[1] is an Australian professional golfer.

Dunk is the son of a greenkeeper at Gosford Golf Club on the NSW Central Coast.

[1] In 1970, Dunk set an Australian lowest-score record of 10 under par 60 at Merewether in the NBN-3 Tournament.

[4][1][5] 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.

*Note: The 1978 Illawarra Open was shortened to 36 holes due to rain.