The title Marquis of Baides (Spanish: Marqués de Baides) is a 17th-century Spanish hereditary title bestowed upon Francisco López de Zúñiga on 20 September 1621 by King Philip IV of Spain. The López de Zúñiga (or Zúñiga) family were Lords of Baides, in the province of Guadalajara, Castile-La Mancha, Spain. There Diego López de Zúñiga, established in 1428 a primogeniture (Spanish: Mayorazgo) over the estate and the surrounding lands. One of his descendants, Francisco López de Zúñiga y de la Cerda, Lord of Baides, was granted the elevation of his title to Marquis in the nobility of Castille by King Philip IV, on 20 September 1621.