Infanta Elena, Duchess of Lugo (Elena María Isabel Dominica de Silos de Borbón y de Grecia; born 20 December 1963 in Madrid) is the first child and elder daughter of Juan Carlos I of Spain and Queen Sofía of Spain, and third in the line of succession to the Spanish throne. She has a younger sister, Infanta Cristina, and a younger brother, King Felipe VI.

Infanta Elena has participated in many official events, having travelled to Germany, the United Kingdom, the United States, Argentina, Japan, Peru, and the Philippines representing the Royal Family.

In 1987, Infanta Elena met her future husband while she was studying French literature in Paris.

She married Jaime de Marichalar y Sáenz de Tejada, son of the Count and Countess of Ripalda, on 18 March 1995, in Seville Cathedral, Seville, at which time her father conferred on her the title Duchess of Lugo for life. The couple has two children: Felipe (born 17 July 1998) and Victoria (born 9 September 2000)

On 13 November 2007, it was announced that she had separated from her husband. In November 2009, the Spanish media reported that she and her husband would divorce, although a rumour to that effect had been circulating for a year before the announcement was made. Their divorce papers were signed on 25 November 2009. The Duchess and Duke of Lugo were divorced in December 2009. On 21 January 2010, the divorce was registered at the Civil Registry of the Spanish Royal Family. It was officially announced on 9 February 2010, that Jaime de Marichalar was no longer permitted to use the ducal title and that he was no longer considered to be an official member of the Spanish Royal Family