Diego Ruiz

• Diego Ruiz (skier), Spanish cross-country skier
• Diego Ruiz (footballer), Argentine footballer
• Diego Ruiz (runner), Spanish middle-distance runner
• Diego Ruiz [de Montoya], Spanish Jesuit theologian
• Diego Ruiz Ortiz, Augustinian missionary and martyr in Peru
• Diego Ruiz Restrepo, Colombian serial killer in Chile
• Quas (video gamer) or Diego Ruiz