Maria Margareta of Dietrichstein

Maria Margareta of Dietrichstein (Maria Margareta Josefa; 18 April 1637 – 15 December 1676), was an Austrian noblewoman born in Moravia, member of the House of Dietrichstein, and by marriage Princess Montecuccoli and Duchess of Melfi.

She was tenth child and sixth (but fifth surviving) daughter of Maximilian, 2nd Prince of Dietrichstein zu Nikolsburg, and his first wife Anna Maria, a daughter of Karl I, Prince of Liechtenstein and Duke of Troppau and Jägerndorf.