Legall de Kermeur (1702 - 1792) was a French chess player.

Along with other famous players, he played in Paris's Café de la Régence , and is considered to have been possibly the strongest player in the world around the 1730s. He taught chess to Francois-André Philidor.

Legall is the eponym of Legall's mate, a mating pattern found in his only extant game, Legall-St Brie, Paris, 1750.