Léonce is a French unisex given name, form of Greek name Leontius . People with the name Léonce include:
Léonce (actor) (1823–1900), French actor and singer Léonce Bekemans (born 1950), Belgian economist and scholar Léonce-Henri Burel (1892–1977), French cinematographer Léonce Corne (1894–1977), French film actor Léonce Lagarde (1860–1936), French colonial governor of French Somaliland and ambassador Léonce Perret (1880–1935), French film actor, director and producer Léonce Rosenberg (1879–1947), French art historian, art collector and publisher Léonce Verny (1837–1908), French officer and naval engineer