Jack Newton OAM (30 January 1950 – 14 April 2022) was an Australian professional golfer. He won the Buick-Goodwrench Open on the PGA Tour and won three times on the European Tour, including the British PGA Matchplay Championship in 1974. He won the Australia Open in 1979 and a number of other tournaments in Australia, New Zealand and Africa. Twice, he was a runner-up in major championships, losing the 1975 Open Championship, in a playoff against Tom Watson, and the 1980 Masters Tournament, where he finished four strokes behind the winner, Seve Ballesteros.