| Archduchess Maria Isabella | |
| Full Name: | Italian: Maria Isabella Annunziata Giovanna Giuseppa Umiltà Apollonia Filomena Virginia Gabriella |
| Countess of Trapani | |
| Issue: | Princess Maria Antonietta, Countess of Caserta Prince Leopoldo Princess Maria Teresa Pia Princess Maria Carolina Prince Ferdinando Princess Maria Annunziata |
| House: | Habsburg-Lorraine |
| Father: | Leopold II, Grand Duke of Tuscany |
| Mother: | Princess Maria Antonia of the Two Sicilies |
| Birth Date: | 21 May 1834 |
| Birth Place: | Florence, Grand Duchy of Tuscany |
| Death Place: | Lucerne, Switzerland |
Archduchess Maria Isabella of Austria, Princess of Tuscany (21 May 1834 - 14 July 1901), was an Archduchess of Austria and Princess of Tuscany by birth and Countess of Trapani by marriage to her uncle Prince Francis, Count of Trapani.
Maria Isabella was born in Florence, Grand Duchy of Tuscany, as the daughter of Leopold II, Grand Duke of Tuscany and his second wife, Princess Maria Antonia of the Two Sicilies.
Maria Isabella married her uncle Prince Francis, Count of Trapani, youngest son of Francis I of the Two Sicilies and his wife Maria Isabella of Spain, on 10 April 1850. Maria Isabella and Francis had six children:
∞ Prince Alfonso, Count of Caserta on 8 June 1868 in Rome, had 12 issue.
∞ Count Andrzej Przemysław Zamoyski on 19 November 1885 in Paris, had 7 children.
On 14 July 1901, Maria Isabella died in Lucerne, Switzerland.