Duke of Santa Elena () is a hereditary title of Spanish nobility, accompanied by the dignity of Grandee. It was created on 9 July 1917 by King Alfonso XIII in favor of Army lieutenant colonel Alberto Enrique de Borbón y CastellvÃÂ, Marquess of Santa Elena and Knight of the Order of the Golden Fleece.
Alberto Enrique de Borbón, a member of the royal family, was the son of Infante Enrique, Duke of Seville. After his father's death, he was adopted by his uncle, Francisco de AsÃÂs, The King Consort. Years later, his cousing, King Alfonso XII, created him Maquess of Santa Elena and, in 1917, King Alfonso XIII elevated the title to the rank of dukedom, granting him also the dignity of Grandee.
On 10 July 1917, the Gazeta de Madrid published the following decree: