Ener Julio (born 14 October 1973) is a Colombian former professional boxer who competed from 1994 to 2008.

He held the WBO junior welterweight title from 2000 to 2002.

He captured the WBO light welterweight title with a decision victory over Randall Bailey in Miami.

Ener Julio was forced to withdraw out of a title defense against Felix Flores when cataracts were revealed during an eye exam, Julio was forced to vacate his title.

[1] Julio would get another shot at the title against DeMarcus Corley but would lose via unanimous decision.