Gaspard-Joseph Chaussegros de Léry (July 20, 1721 – December 11, 1797)—his first name is also sometimes written Joseph-Gaspard—is a military engineer and a political figure in Lower Canada.

During the Seven Years' War he proves himself to be an outstanding officer and is one of only a few colonial officers held in high esteem by the Marquis de Montcalm.

In recognition of his military service, in 1759 he is made a Chevalier of the Order of Saint Louis.

After the British Conquest of New France in 1763, he and his wife, Louise Martel de Brouage, are the first French Canadian couple to be presented to the English Court, drawing the compliment from King George III that if all Canadian ladies resemble Mme de Léry then he has "indeed made a conquest".