Ernest, Duke of Austria
| Ernest I | |
|---|---|
| Duke of Austria | |
Portrait by Anton Boys, c. 1580 | |
| Duke of Styria, Carinthia and Carniola | |
| Reign | 15 July 1406 – 10 June 1424 |
| Predecessor | William |
| Successor | Frederick V and Albert VI |
| Born | 1377 Bruck an der Mur, Duchy of Styria |
| Died | 10 June 1424 Bruck an der Mur, Duchy of Styria |
| Spouse | |
| Issue Detail | |
| House | Habsburg |
| Father | Leopold III, Duke of Austria |
| Mother | Viridis Visconti |
Ernest the Iron-Willed (German: Ernst der Eiserne; 1377 – 10 June 1424), a member of the House of Habsburg, ruled over the Inner Austrian duchies of Styria, Carinthia and Carniola from 1406 until his death. He was head of the Habsburg Leopoldian line from 1411.