Philipp Sigmund of Dietrichstein (9 March 1651 – 3 July 1716), was a German prince member of the House of Dietrichstein.
He was the fourth child and third (but second surviving) son of Maximilian, 2nd Prince of Dietrichstein zu Nikolsburg, and his second wife Sophie Agnes, a daughter of Wolfgang III, Count of Mansfeld-Vorderort-Bornstädt.[1]