Maurilio Castillo (born 1 December 1962) is a Mexican male former long-distance runner who specialised in the marathon.
He represented his country at the 1991 World Championships in Athletics and finished seventh there.
He holds a personal best of 2:10:47 hours set when he finished third at the Tokyo International Marathon.
[1] He was the 1992 winner at the Central American and Caribbean Cross Country Championships.
[2] Castillo also competed at the 1995 Pan American Games.