Lucio Cabañas Barrientos (December 12, 1938 – December 2, 1974) was a Mexican schoolteacher who became a revolutionary, albeit not a Marxist one. Cabañas regarded Emiliano Zapata as his role model and he never abandoned his Christian faith, as can be seen in Gerardo Tort's film documentary on him.
When a rector of Juan Álvarez school in Atoyac demanded that all pupils wear school uniforms, Cabañas argued that some families were so poor they could hardly feed their children, not to mention buy school uniforms. The rector was fired but his supporters remained. When a May 18, 1967 strike action ended in shooting and deaths, Cabañas fled to the mountains and joined the group of Genaro Vázquez Rojas until Vázquez' death on February 2, 1972.