Montmorin may refer to the following people and places.

People Armand Marc, comte de Montmorin, French minister of foreign affairs and the navy under Louis XVI.

Places Montmorin, Hautes-Alpes, a commune in the department of Hautes-Alpes Montmorin, Puy-de-Dôme, a commune in the department of Puy-de-Dôme