Archduchess Maria Theresa of Austria-Este (German: Maria Theresia Beatrix Gaëtane, Erzherzogin von Österreich-Este, Prinzessin von Modena) (14 July 1817, Modena, Duchy of Modena and Reggio – 25 March 1886, Gorizia, Austria–Hungary) was a member of the House of Austria-Este and Archduchess and Princess of Austria, Princess of Hungary, Bohemia, and Modena by birth. Through her marriage to Henri, comte de Chambord, Maria Theresa was also a member of the House of Bourbon. Henri was disputedly King of France and Navarre from 2 to 9 August 1830 and afterwards the Legitimist Pretender to the throne of France from 1844 to 1883. Maria Theresa was the eldest child of Francis IV, Duke of Modena and his wife Maria Beatrice of Savoy.

Maria Theresa married Henri, comte de Chambord, the posthumous son of Charles Ferdinand, Duke of Berry, younger son of Charles X of France, by his wife, Princess Caroline Ferdinande of Bourbon-Two Sicilies, daughter of Francis I of the Two Sicilies, by proxy on 7 November 1846 in Modena and in person on 16 November 1846 in Bruck an der Mur. Maria Theresa and Henri produced no children.