Carlos Diaz is the name of:
- Carlos Diaz (pitcher) (born 1958), pitcher in Major League Baseball
- Carlos Díaz (politician) (born 1970), member of the Senate of Puerto Rico
- Carlos Diaz (Belizean politician), former Minister of Energy and Communications
- Carlos Díaz (actor) (born 1970), Chilean-born Canadian film and television actor
- Carlos Enrique Díaz de León (1910–1971), provisional President of Guatemala, 1954
- Carlos Diaz (American soccer) (born 1987), professional footballer who currently plays for Ferencvarosi TC, Hungary
- Carlos Richard Díaz (born 1979), Uruguayan international footballer who played for Defensor Sporting
- Carlos Diaz (catcher) (born 1964), played for Toronto Blue Jays
- Carlos Diaz (Emmerdale), fictional character in British TV soap opera Emmerdale
- Carlos Diaz (theater director) (born 1957), Cuban theater director
- Carlos Díaz "Caíto" (1945–2004), Argentinian singer-songwriter and guitarist
- Carlos Alberto Díaz (born 1982), Colombian football defender who currently plays for Atlético Huila
- Carlos Gaviria Díaz (born 1937), Colombian lawyer, professor and politician
- Carlos Jiménez Díaz (1898–1967), Spanish physician and clinical researcher
- Carlos Rodriguez Diaz
- Carlos Díaz (athlete), see 2010 South American Cross Country Championships
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