Countess Marie Festetics von Tolna (20 October 1839 – 16 April 1923), was an Austro-Hungarian countess, diarist and lady-in-waiting.
Born in Tolna, Hungary, into an old and distinguished House of Festetics, she was the fifth child and fourth daughter of Count Sandor Festetics von Tolna (1805–1877) and his wife, Baroness Josephine von Boxberg (1811–1892).
She served as lady-in-waiting to Empress Elisabeth of Austria from 1870, and became one of the favorites and confidantes of the Empress. She was also a noted diarist and her diaries are regarded as an important source of the Imperial Austrian court.
