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: Ilustrísimo Señor Marqués de Vargas Llosa ("The Most Illustrious The Marquess of Vargas Llosa").
Marquesses of Vargas Llosa Jorge Mario Pedro Vargas Llosa, 1st Marquess of Vargas Llosa (1936–2025) Álvaro Mario Vargas-Llosa, 2nd Marquess of Vargas Llosa (2026–present)
The heir apparent is the holder's eldest son, ''Leandro'' Vargas-Llosa y Abad.
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