Maria Sophia of Dietrichstein (Maria Rosina Sophia;[1] 11 July 1646 – 4 November 1711), was a German noblewoman by birth, member of the House of Dietrichstein, and by her two marriages Countess of Pötting auf Ober-Falkenstein and Lobkowicz.
She was the fifth child and second daughter of Maximilian, 2nd Prince of Dietrichstein zu Nikolsburg, and his second wife Sophie Agnes, a daughter of Wolfgang III, Count of Mansfeld-Vorderort-Bornstädt.[2][better source needed][3]