Gary L. Leadston (June 24, 1941 – December 2, 2013) was a politician in Ontario, Canada.
He was also the founding member of the Big Brothers Association in Kitchener Waterloo in the 1970s and served as its president in 1975–1976.
In September 1996, he put his name forward to run for speaker to replace the disgraced Al McLean.
Leadston ran for the Kitchener Centre PC nomination in 1999, but was defeated by Wayne Wettlaufer.
[4] In 2000, he sought the federal Canadian Alliance nomination in Lanark—Carleton, but lost to Scott Reid.