Jean-Jacques Lartigue (June 20, 1777 – April 19, 1840) was a CanadianRoman Catholic who served as the first Bishop of Montreal. He was the only son of a noted Montreal family. He attended the best of schools, receiving a solid education, and then articling for three years with a Montreal firm where he developed a lifelong interest in Lower Canada politics.
In 1797, Lartique gave up a promising career in law and turned toward the priesthood. He then taught and studied for the priesthood under the Sulpicians. In 1800 he was ordained a priest and in 1806 became a member of the Sulpician community, although he later clashed with that order in the 1830s during his reign as Bishop of Montreal due to his ultramontanist beliefs.
Lartigue was consecrated vicar-general of Montreal in 1821, and on September 8, 1836 when Montreal was made a bishopric, he was named as its first bishop. He served in that capacity until his death in 1840. He was succeeded as bishop of Montreal by Ignace Bourget.