Francisco Diaz may refer to:

• José and Francisco Díaz, members of the Puerto Rican Militia who defended Puerto Rico from a British invasion in 1797
• Francisco Domingo Díaz, 19th century governor of San Juan Province, Argentina
• Francisco Diaz-Silveira (1871–1925), Cuban journalist, writer and poet
• Francisco Díaz de León (1897–1975), Mexican engraver
• Francisco Diaz-Silveira Lopez (1908–1996), attorney
• Frank Diaz-Silveira (born 1936), Florida attorney, anti-Castro Cuban militant
• Francisco Estévez Diaz, Spanish composer
• Francisco Bustillos Diaz, better known by screen name Paquito Diaz (1937–2011), Filipino actor and movie director
• Francisco Javier Díaz Madriz, director-general of the Nicaraguan National Police
• Francisco José Díaz (born 1982), Honduran footballer

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