William Johnstone (born 15 June 1959) is an Australian former rugby league footballer who played for Canterbury-Bankstown, St. George and the Gold Coast Giants.
[3] Johnstone made his first grade debut in the NSWRL competition for Canterbury against the Illawarra Steelers in round 1 1983 at Belmore Sports Ground.
In 1987, Johnstone joined St George but only played the one season with them and then signed for the newly admitted Gold Coast team.
In July 2008, he was granted a release from the Gold Coast Titans and has signed a three-year deal with the North Queensland Cowboys, beginning in 2009.
Billy Jonstone also is currently operating as a personal trainer from a local gym in Townsville, Queensland named 'The Zoo Health & Fitness, where he trains intermediate to advanced members and uses his Strength & Conditioning knowledge to good value.