García de Toledo Osorio or García Álvarez de Toledo Osorio, 6th Marquess of Villafranca, (25 April 1579 in Naples – 21 January 1649 in Madrid), Prince of Montalbano, 3rd Duke of Fernandina was a Spanish-Italian nobleman, military and a Grandee of Spain.
As a child he was already Trece (thirteen) in the Order of Santiago, Prince of Montalbano and Duke of Fernandina.
In this capacity, he participated in the successful Defense of Cadiz in 1625, and won a victory against France when he conquered the Lérins Islands (1635).
During the Catalan Revolt, in 1641 he won the important Battle of Tarragona (August 1641) against the French fleet under Henri de Sourdis, thus lifting the siege of the city.
After the fall of Olivares, Garcia was reinstated in all his functions and he was given 400,000 ducats as a compensation for having been punished unjustly.