Gaston Rahier (February 1, 1947, Herve, Wallonia – February 8, 2005, Paris, France) was a motocross racer from Belgium. He was three-time FIM World Champion in the 125cc division, claiming the title in 1975, 1976 and 1977. He later went on to race in and win the famous Paris-Dakar rally for BMW motorcycles, in 1984 and 1985. At the end of that last year he was named, alongside long-distance runner Vincent Rousseau, as the Belgian Sportsman of the Year. Rahier is a Paris-Dakar legend, once referred to as "The little man with the giant reputation." Rahier died in Paris after a long disease.