Leandro José Díaz Duarte (born February 20, 1928 in Hatonuevo, La Guajira) is a Colombian vallenato music composer. He is mostly known for his ability to compose very descriptive and narrative vallenato songs despite his blindness. His songs have been recorded by many prominent Colombian musicians including Carlos Vives, Diomedes Diaz, Jorge Oñate, Ivan Villazon, among others.
During the 38th version of the Vallenato Legend Festival, Diaz was proclaimed "King for Life of the Vallenato Legend Festival" along Rafael Escalona, Emiliano Zuleta Baquero, Calixto Ochoa, Adolfo Pacheco and Tobías Enrique Pumarejo
