Duke of Sotomayor (Spanish: Duque de Sotomayor) is a title of Spanish nobility that was created, with Grandee of Spain, on 25 April 1703 by King Philip V in favor of Fernando Álvarez de Sotomayor y Lima, 2nd Marquess of Tenorio, 2nd Count of Crecente and Lord of Sotomayor.

[1] The name of the title refers to the Lordship of Sotomayor, a Galician municipality in the current Province of Pontevedra.

[2][3][4] The Lordship and Castle of Sotomayor was in the possession of the Dukes until the end of the 18th century, when it was lost to Benito Fernández Correa y Sotomayor, 4th Marquess of Mos, who won the lawsuit for a better right that his father, Pelayo Antonio Correa Sotomayor, had initiated on 14 May 1773, on the lands of the Sotomayor estate.

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