Hyacinthe-Marie Cormier was a French Dominican priest and theologian who led the Order of Preachers as Master General from 1904 until his death in 1916. Born Louis Stanislas Henri Cormier in Orléans in 1832, he entered the Dominican Order and was ordained in 1856. Throughout his religious career, he held various leadership roles, including serving as the Prior of Corbara and the first Prior Provincial of Toulouse. He is remembered for his significant administrative leadership and his efforts to expand the Dominican presence worldwide.