George Seymour Lyon (1858–1938) was a Canadian golfer, an Olympic gold medalist in golf, an eight-time Canadian Amateur Championship winner, and a member of Canada's Sports Hall of Fame. He worked in the insurance industry. Although he only began playing golf at the age of 38, due to lack of available golf courses in most areas of Canada before that date, he won the gold medal in golf in the 1904 Summer Olympics in St. Louis, Missouri, at age 46, only eight years after beginning the sport. He won the Canadian Amateur Championship a record eight times between 1898 and 1914, the last time in his 56th year.