Nicolas Gersin (born 1765 – died December 1833 at Chantilly) was a French playwright and librettist. An uncle of Jean-Louis-Auguste Loiseleur-Deslongchamps who studied in his home, his plays have been performed on the most important Parisian stages of the 19th century: Théâtre du Vaudeville, Théâtre de l'Odéon, Théâtre des Variétés-Amusantes, Théâtre-Français etc. He died of apoplexy in December 1833 at Chantilly.