Mario Orozco Rivera (January 19, 1930 – November 20, 1998) was a Mexican muralist and painter, a later proponent of Mexican muralism, and whose work was particularly influenced by David Alfaro Siqueiros. He created a number of murals, mostly in the state of Veracruz before becoming an assistant to Siqueiros, directing the Taller Siqueiros in Cuernavaca and working with the artists on projects such as the Polyforum Cultural Siqueiros. While preferring mural work, which he considered less commercial, Orozco Rivera also created oils and sculptures. Many of these works were exhibited in Mexico and abroad and can be found in many major collections. His work received recognition in various countries.