The Marquess of Villamayor de las Ibernias () is a title of Spanish nobility that was created on 7 April 1617 by King Philip III in favor of Francisco Pacheco de Córdoba y Bocanegra.
Francisco Pacheco de Córdoba y Bocanegra, 1st Adelantado of the Kingdom of Nueva Galicia in New Spain, Knight of the Order of Santiago and Lord of Villamayor de las Ibernias, which he bought in 1613.
The title was rehabilitated in 1918 by King Alfonso XIII in favor of MarÃÂa Luisa Cotoner y ÃÂlvarez de las Asturias Bohorques, 8th Marchioness of Bélgida, etc., niece of the 12th Marquess, who thus became the 13th Marchioness of Villamayor de las Ibernias.