Duke of Suárez (Spanish: Duque de Suárez) is a hereditary title in the Spanish nobility. The dukedom was bestowed by King Juan Carlos on Adolfo Suárez in 1981, following his resignation as Spanish Prime Minister, in recognition of his role in the Spanish transition to democracy. The Duke of Suárez is also a Grandee of Spain.
The duke's heir apparent is his son, Adolfo Suárez Illana.