Duke of Franco (Spanish: Duque de Franco) is a hereditary title in the Spanish nobility. The dukedom was created in 1975 by King Juan Carlos and bestowed upon Carmen, the daughter and only child of Spain's Caudillo, General Francisco Franco. Together with the dukedom, she received a Coat of Arms of new creation. These arms are a variation of the arms of Andrade family of Galicia, from whom Franco was descended through females.
In 1950, Carmen Franco had married Cristóbal Martínez-Bordiú, 10th Marquess of Villaverde, by whom she had several children. The dukes and duchesses of Franco are also Grandees of Spain.
The duchess' heir apparent, under current Spanish succession law, is her eldest child, María del Carmen Martínez-Bordiú y Franco.