Eduardo Humberto del Río García (June 20, 1934 – August 8, 2017), better known by his pen name Rius, was a Mexican intellectual, political cartoonist and writer.

One of the most popular Mexican cartoonists, Rius has written over a hundred books that remain widely popular, especially amongst his Mexican readers. Rius was a fierce political activist, and his progressive and left-wing point of view is often present in his writings, accompanied by a strong criticism about neoliberal Mexican doctrines, US Government policies, and the Catholic Church. He used to be an open advocate of the Cuban revolution as in Cuba for Beginners and a strong Soviet bloc sympathizer until the end of the Cold War.