Princess Maria Theresia of Thurn and Taxis, (full German name: Maria Theresia, Prinzessin von Thurn und Taxis, 6 July 1794 in Regensburg, Free Imperial City of Regensburg, Holy Roman Empire – 18 August 1874 in Hütteldorf, Penzing, Vienna, Austria-Hungary) was a member of the House of Thurn and Taxis and a Princess of Thurn and Taxis by birth and a member of the House of Esterházy and Princess Esterházy of Galántha from 25 November 1833 to 21 May 1866 through her marriage to Paul III Anthony, 8th Prince Esterházy of Galántha.

Maria Theresia was the third child and second daughter of Karl Alexander, 5th Prince of Thurn and Taxis and his wife Duchess Therese of Mecklenburg-Strelitz.

She was an elder sister of Maximilian Karl, 6th Prince of Thurn and Taxis.

Maria Theresia married Prince Paul Anthony Esterházy of Galántha,[1] eldest child and son of Nicholas II, 7th Prince Esterházy of Galántha and his wife Princess Maria Josepha of Liechtenstein, on 18 June 1812 in Regensburg, Kingdom of Bavaria.

During his long tenure as Austrian Ambassador to the United Kingdom (1815-1842), she became a leader of fashionable society.