| Costești | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Vâlcea County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Pietreni, Costești |
| Length: | 20km (10miles) |
| Source1: | Căpățânii Mountains |
| Mouth: | Bistrița |
| Mouth Location: | Costești |
| Mouth Coordinates: | 45.13°N 24.0512°W |
| Basin Size: | 46km2 |
| Tributaries Left: | Ghelălău, Pârâul Sec, Saga |
| Tributaries Right: | Pârâul lui Ignat |
The Costești is a left tributary of the river Bistrița in Romania. It flows into the Bistrița in the village Costești.[1] Its length is 20km (10miles) and its basin size is 46km2.[2]