Rubén Díaz may refer to:

• Rubén Díaz Sr. (born 1943), New York City Council member
• Rubén Díaz Jr. (born 1973), Borough President of the Bronx (New York City)
• Rubén Oswaldo Díaz (1946–2018), Argentine association football player (Racing Club, Argentina national team)
• Rubén Ruiz Díaz (born 1969), Paraguayan football goalkeeper
• Rubén Toribio Díaz (born 1952), Peruvian association football player

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