| Izvorul Dorului | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Prahova County |
| Length: | 16km (10miles) |
| Source1: | Mount Cocora |
| Source1 Location: | Bucegi Mountains |
| Source1 Coordinates: | 45.4047°N 25.4761°W |
| Source1 Elevation: | 2139m (7,018feet) |
| Mouth: | Prahova |
| Mouth Location: | Sinaia |
| Mouth Coordinates: | 45.3294°N 25.5658°W |
| Mouth Elevation: | 758m (2,487feet) |
| Basin Size: | 33km2 |
The Izvorul Dorului is a right tributary of the river Prahova in Romania. It discharges into the Prahova in Sinaia. Its length is 16km (10miles) and its basin size is 33km2.
The following rivers are tributaries to the river Izvorul Dorului (from source to mouth):