Gilles Terral (1943 – 12 August 1998) was a French entomologist. He specialised in Lepidoptera Parnassiinae and Saturniidae.
As a Parnassius specialist he made an expedition to Ladakh with Jean-Claude Weiss in July 1983. As a Saturnid specialist he wrote articles with Philippe Darge and Claude Lemaire (see below).
He was working on a book on the Saturniidae of the world, to be published by Sciences Nat, most of the colour separations of the photos were already done for the printing. His collection of Saturniidae (251 boxes) is now at the Musée d'Histoire Naturelle de Lyon.