Mario Reyes Castillo is a Mexican printmaker, painter and sculptor best known for his work with the Taller Libre de Grabado Mario Reyes, which he founded in 1965. This workshop has collaborated with and done work for a number of notable Mexican artists. Much of his artwork is dominated with depictions of the female form, with the artist stating he can see it in many places and objects. His work has been recognized with tributes and retrospectives in places such as the Museo Nacional de Estampa and the Palacio de Bellas Artes. He is also a member of the Salón de la Plástica Mexicana.