Louis of Lorraine (7 December 1641 – 13 June 1718) was the Count of Armagnac[1] from his father's death in 1666.

His younger brother, Philippe, chevalier de Lorraine, was infamously the lover of Monsieur, i.e., Philippe I, Duke of Orléans, younger brother of Louis XIV.

At Louis' death, the post, as well as style of Monsieur le Grand was taken by his son Charles, Count of Armagnac (at Charles' death, it was given to Louis' grandson, the prince de Lambesc).

At the death of his father in 1666, he inherited the title comte d'Armagnac which, although it evoked the family of the great House of Armagnac, did not entail possession of the vast lands and semi-sovereign authority wielded by the extinct, medieval Counts of Armagnac.

He was buried at the Abbey of Royaumont, located near Asnières-sur-Oise in Val-d'Oise, approximately 30 km north of Paris, France.