Julio César Castillo Torres[a] (born 10 May 1988)[3] is an Ecuadorian amateur boxer.

He won two medals at the Pan American Games: a bronze in 2007 and a silver in 2011.

At the 2006 South American Games, Castillo lost to Hamilton Ventura in the semifinals and ended up with a bronze medal.

At the 2007 Pan American Games, he won 15:5 against Carlos Negron, but lost to the eventual winner Eleider Alvarez 8:10 in the semifinal.

He failed to qualify for the 2008 Summer Olympics and went up to heavyweight, winning a silver at the 2011 Pan American Games.