Julio Voltio (also known simply as Voltio; born as Julio Irving Ramos Filomeno on June 11, 1977, in Santurce, San Juan, Puerto Rico) is a Puerto Rican (former) singer and rapper. An early pioneer of reggaetón—a modern genre of Latin music originating primarily in Panamá and Puerto Rico, with sonic roots in Jamaican dancehall and American hip hop—Voltio officially retired from the music industry in 2014, having converted to Christianity.

The name "Voltio"—meaning "(electrical) volt"—came about after an incident, during his time as an electrician, in which he inadvertently placed his hand in the wrong location and received an electric shock. At that point, he began being referred to by friends as "Bombillo" ("light bulb") or "Corto-Circuito" ("short-circuit"), until eventually calling him "Voltio".

The artists formerly known as Voltio now identifies as a born-again Christian, once stating in an interview: "…Yes, really[,] I accepted Christ as my savior[;] I really do [accept Christ,] because sometimes you have a void in the hearts [your heart] and therefore need to search for Christ."