Archduchess Rosa Maria Antonie Roberta Josepha Anna Walburga Carmela Ignazia Rita de Cascia of Austria, full German name: Rosa Maria Antonie Roberta Josepha Anna Walburga Carmela Ignazia Rita de Cascia, Erzherzogin von Österreich (22 September 1906, Parsch, Salzburg, Salzburg, Austria–Hungary – 17 September 1983, Friedrichshafen, Baden-Württemberg, Germany) was a member of the Tuscan branch of the House of Habsburg-Lorraine and an Archduchess of Austria and Princess of Bohemia, Hungary, and Tuscany by birth. Through her marriage to Philipp Albrecht, Duke of Württemberg, Rosa was also a member of the House of Württemberg and Duchess consort of Württemberg.

Rosa was the youngest child and third daughter of Archduke Peter Ferdinand, Prince of Tuscany and his wife Princess Maria Cristina of Bourbon-Two Sicilies. Rosa was raised with her three siblings in Salzburg and Vienna until the end of World War I in 1918 when her family emigrated and moved to Lucerne, Switzerland.

Rosa married Philipp Albrecht, Duke of Württemberg, eldest child and son of Albrecht, Duke of Württemberg and his wife Archduchess Margarete Sophie of Austria, on 1 August 1928 in Friedrichshafen. Rosa and Philipp Albrecht had two sons and four daughters: