The Marquess of San Juan de Piedras Albas () is a title of Spanish nobility that was created on 31 August 1690 by King Charles II in favor of Francisco Silvestre Pizarro Piccolomini de Aragón.
The Marquessate of San Juan de Piedras Albas was granted by King Charles II on 31 August 1690 along with a royal decree from the same king on 16 August 1691. He was butler and equerry to the Queen. On 15 December 1739, King Philip V granted the title Grandee of Spain status, allowing the marquesses to enjoy greater social privileges than those of other similar European dignities.
The name of the title refers to the municipality of Piedras Albas, in the Province of Cáceres, Extremadura, Spain. They owned the Palacio de Piedras Albas in Trujillo, Cáceres, built in , formerly owned by the family of the conquistador and explorer Francisco de Orellana, and the Marqueses de Orellana.