Villanueva (March 18, 1945 – May 13, 2014) was a boxer from the Philippines.
He competed in the featherweight (-57 kg) division at the 1964 Olympics and won a silver medal.
Shortly after the Olympics he turned professional, but retired after five bouts.
Besides boxing, Villanueva worked as an actor and boxing coach in the Philippines and as a security guard in the United States.
He died penniless and bedridden after suffering several strokes.His father, José Villanueva, was also an Olympic boxer who won a bronze medal as a bantamweight at the 1932 Los Angeles Games.