Don Carlos Bernardo Fitz-James Stuart y Silva, 4th Duke of Liria and Jérica, 4th Duke of Berwick (25 March 1752 – 7 September 1787) was a Spanish nobleman.

Born in Liria, Spain, he was the son of James (Jacobo) Fitz-James Stuart, 3rd Duke of Berwick, and his wife, María Teresa de Silva y Álvarez de Toledo (a sister of Fernando, 12th Duke of Alba).

On 9 October 1771 he married Princess Caroline of Stolberg-Gedern (10 February 1755 – 15 April 1828), sister of the Jacobite consort Louise of Stolberg-Gedern and sister-in-law to Charles Edward Stuart, called by Jacobites King Charles III.

In 1787, he lost by court order the titles held from the house of Columbus, namely the Dukedom of la Vega, the Dukedom of Veragua, the Marquisate of Jamaica, the Admiralty of the Ocean Sea and the Admiralty of the Indies, in favour of Mariano Colón de Larreátegui, who became the legal holder of said titles.

The Duke served as a Gentleman of the Bedchamber to King Charles III of Spain.