| Dejeasca | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Olt, Vâlcea |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Dejești |
| Length: | 13km (08miles) |
| Mouth: | Geamăna |
| Mouth Location: | Geamăna |
| Mouth Coordinates: | 44.8082°N 24.3057°W |
| Progression: | Geamăna→ |
| Basin Size: | 20km2 |
| Custom Label: | River code |
| Custom Data: | VIII.1.156.1 |
The Dejeasca is a left tributary of the river Geamăna in Romania. It flows into the Geamăna in the village Geamăna. Its length is 13km (08miles) and its basin size is 20km2.[1]