Jacques-François Lefranc was an 18th-century French cleric and abbot belonging to the Congregation of Jesus and Mary. Born in Vire in 1739, he served as the Vicar General of Coutances and held a position at the seminary in Caen. He was known for his opposition to Jansenism and his writings regarding the French Revolution. Following his refusal to swear allegiance to the new Constitution, he was imprisoned in Paris, where he was eventually killed during the revolutionary period in 1792.