Lemoine or Le Moine is a French surname meaning "Monk". Notable people with the surname include:
Adolphe Lemoine, known as Lemoine-Montigny (1812–1880), French comic-actorAntoine Marcel Lemoine (1763–1817) musician, music publisher, father to Henry LemoineCyril Lemoine (born 1983), French cyclistÉmile Lemoine (1840–1912), French geometricianHenri Lemoine (cyclist) (1909–1981), French cyclistHenri Lemoine (fraudster) (fl. 1902–1908), French fraudsterHenry Lemoine (1786–1854), Piano teacher, music publisher, composerJacques-Antoine-Marie Lemoine (1751–1824), also Lemoyne, French painterJames MacPherson Le Moine (1825–1912), Canadian writer, lawyer and historianJean Lemoine (1250–1313), French canon lawyer, cardinal, bishop and papal legateJordy Lemoine (born 1988), French singerLouis Lemoine (1764–1842), French general of the French Revolutionary WarsMarie-Victoire Lemoine (1754–1820), French painterPablo Lemoine (born 1975), Uruguayan rugby union playerPierre-Antoine Lemoine (1605–1665), French painterRoger Le Moine (1933–2004), Canadian professor of literature and literary criticVictor Lemoine (1823–1911), French horticulturistVirginie Lemoine, French humourist, comedian and actorYvan Lemoine (Born 1981), Acclaimed Chef & Author