Maximilian, Prince of Dietrichstein (27 June 1596 – 6 November 1655), was a German prince member of the House of Dietrichstein, Imperial Count (Reichsgraf) of Dietrichstein and owner of the Lordship of Nikolsburg in Moravia; since 1629 2nd Prince (Fürst) of Dietrichstein zu Nikolsburg, Baron (Freiherr) of Hollenburg, Finkenstein and Thalberg, was a diplomat and minister in the service of the House of Habsburg. He was a Kämmerer, Lord Chamberlain (Obersthofmeister), Conference Minister (Konferenzminister) and Privy Councillor of Emperors Ferdinand II and Ferdinand III, Knight of the Order of the Golden Fleece since and ruler over Nikolsburg (now Mikulov), Polná, Kanitz (now Dolní Kounice), Leipnik (now Lipník nad Bečvou), Weisskirch and Saar (now Žďár nad Sázavou).