| Oldřich I of Rosenberg | |
| More: | no |
| Spouse: | Elizabeth of Vartemberk |
| Spouse-Type: | Wife |
| Issue: | Henry III of Rosenberg |
| Native Name: | Oldřich I. z Rožmberka |
| Noble Family: | Rosenberg family |
| Father: | Peter I of Rosenberg |
| Death Date: | 4 March 1390 |
| Burial Place: | Vyšší Brod Monastery |
Oldřich I of Rosenberg (died 4 March 1390) was the fourth son of the Peter I of Rosenberg and his second wife, . Together with his mother and brothers, he founded a Minorite monastery in Český Krumlov.[1]
After the death of his older brother, Oldřich became head of the Rosenberg family. Between 1381 and 1382, together with his brothers and Jindřich of Hradec, Oldřich militarily supported Jindřich of Schaunberg in his dispute with Albert III, Duke of Austria. The dispute was eventually mediated by Czech King Wenceslas IV.