Archduchess Maria Beatrix of Austria-Este (German: Maria Beatrix Anna Franziska, Erzherzogin von Österreich-Este, Prinzessin von Modena; 13 February 1824 – 18 March 1906) was the consort of the Carlist pretender, Juan, Count of Montizón and, by birth, a member of the House of Austria-Este which had ruled the Duchy of Modena.
She was born in Modena, the youngest daughter of Francis IV of Modena and his niece consort, Maria Beatrice of Savoy.