Óscar Díaz is the name of:
Oscar Díaz (boxer) (1982–2015), American boxer Óscar Díaz (Colombian footballer) (born 1972), Colombian footballer Óscar Díaz (Spanish footballer) (born 1984), Spanish footballer Óscar Díaz (Paraguayan footballer) (born 1984), Paraguayan footballer Óscar Díaz (Bolivian footballer) (born 1985), Bolivian footballer
See also Tito Díaz (born 1984), Paraguayan footballer, full name Óscar Armando Díaz