Ernest I was the Duke of Swabia (1012–1015). He was a younger son of Leopold I, the Babenberg Margrave of Austria. His mother was called Richardis of Sualafeldgau.
- Occupation
- aristocrat
- Position held
- Duke of Swabia
- Citizenship
- Holy Roman Empire
- Born
- 984
- Died
- May 31, 1015, 1015
