| Aldobrandino I d' Este | |
| Office: | Marquis of Este and Ferrara |
| Successor: | Obizzo II d'Este |
| Birth Date: | 1190 |
| Birth Place: | Ferrara |
| Death Date: | 10 October 1215 |
| Predecessor: | Azzo VI of Este |
| Children: | Saint Contardo of Este Beatrice d'Este |
| Term Start: | November 1212 |
| Term End: | 10 October 1215 |
Aldobrandino I d' Este (- 10 October 1215) was the marquis of Este and Ferrara, both in Italy. He was co-ruler with his half brother Azzo VII. He was also the posthumous father of Saint Contardo of Este. His daughter Beatrice married King of Hungary, Andrew II, and became Queen of Hungary.[1]