Desmarets is a surname. Notable people with the surname include:
Daniel Desmarets, natural history author (Insectorum et animalium Thesaurus, Leiden 1716) Henri Desmarets (1661–1741), French composer Jean Desmarets (1595–1676), French writer and dramatist Nicolas Desmarets, Controller-General of Finances during the reign of Louis XIV of France Yves Desmarets, French-born Haitian footballer