Diego Ruiz

Diego Ruiz may refer to:


 * Diego Ruiz (skier) (born 1977), Spanish cross-country skier
 * Diego Ruiz (footballer) (born 1980), Argentine footballer
 * Diego Ruiz (runner) (born 1982), Spanish middle-distance runner
 * Diego Ruiz de Montoya (1562–1632), Spanish Jesuit theologian
 * Diego Ruiz Restrepo (born 1990), Colombian serial killer in Chile
 * Quas (video gamer) or Diego Ruiz