Marquess of Vargas Llosa (Spanish: Marqués de Vargas Llosa) is a hereditary title in the Spanish nobility granted in 2011 by Juan Carlos I to Mario Vargas Llosa, renowned writer and Nobel laureate.

[2] His style of address is: Ilustrísimo Señor Marqués de Vargas Llosa ("The Most Illustrious The Marquess of Vargas Llosa").

The heir apparent is the 1st Marquess' eldest child, Álvaro Vargas Llosa.