Luis Méndez de Haro, 6th Marquis of Carpio and 2nd Duke of Olivares or Luis Méndez de Haro y Guzmán, GE, (17 February 1598 – 26 November 1661), was a Spanish political figure, general and art collector. He was the royal favourite (Spanish: valido) of Philip IV. De Haro was also notable as being one of the very few Spanish royal favourites of the period to die whilst still in favour.