Benji Oldai Villalobos Segovia (born 15 July 1988 in El Salvador) is a Salvadoran professional goalkeeper.
Villalobos played for Segunda División club Universidad Gerardo Barrios in 2005, before joining Águila in 2006.
On 22 December 2009, Águila reached the Apertura 2009 final against FAS, but lost 2–3, Villalobos did not play.
Águila reached the Clausura 2016 final, but lost again local rivals Dragón 0–1, Villalobos was in goal.
He has since been selected numerous times, but only received his first full men's national team cap when he played in an international friendly against Guatemala in September 2010, which El Salvador lost two-nil.