| Archduchess Maria Theresa | |
| Full Name: | German: Maria Theresia Antoinette Immakulata Josepha Ferdinanda Leopoldine Franziska Caroline Isabella Januaria Aloysia Christine Anna |
| Issue: | Archduchess Eleonora Archduchess Renata Archduke Karl Albrecht Archduchess Mechthildis Archduke Leo Karl Archduke Wilhelm |
| House: | Habsburg-Tuscany |
| Father: | Archduke Karl Salvator of Austria |
| Mother: | Princess Maria Immacolata of Bourbon-Two Sicilies |
| Birth Date: | 18 September 1862 |
| Birth Place: | Alt-Bunzlau, Bohemia, Austrian Empire |
| Death Place: | Żywiec Castle, Żywiec, Poland |
Archduchess Maria Theresa of Austria (German: Maria Theresia Antoinette Immakulata Josepha Ferdinanda Leopoldine Franziska Caroline Isabella Januaria Aloysia Christine Anna, Erzherzogin von Österreich) (18 September 1862, in Alt-Bunzlau, Bohemia, Austrian Empire – 10 May 1933, in Żywiec Castle, Żywiec, Poland) was a member of the House of Habsburg-Tuscany and Archduchess of Austria, Princess of Tuscany by birth. Maria Theresia was the eldest child and eldest daughter of Archduke Karl Salvator of Austria and his wife, Princess Maria Immaculata of Bourbon-Two Sicilies.
Maria Theresa married her mother's second cousin Archduke Charles Stephen of Austria, fourth child and third son of Archduke Karl Ferdinand of Austria and his wife, Archduchess Elisabeth Franziska of Austria, on 28 February 1886 in Vienna. Maria Theresia and Charles Stephen had six children together: