Marquess of Vargas Llosa () is a hereditary title in the Spanish nobility created in 2011 by King Juan Carlos I in favor of Mario Vargas Llosa, renowned writer and Nobel laureate.
His style of address is: IlustrÃÂsimo Señor Marqués de Vargas Llosa ("The Most Illustrious The Marquess of Vargas Llosa").
The heir apparent is the holder's eldest son, Leandro Vargas Llosa.