| Type: | commune |
| County: | Vâlcea |
| Population Total: | auto |
| Costești | |
| Leader Name: | Toma-Marius Peștereanu |
| Leader Party: | PSD |
| Leader Term: | 2020 - 2024 |
| Coordinates: | 45.15°N 28°W |
| Elevation: | 452 |
| Area Total: | 100.2 |
| Postal Code: | 247115 - 247118 |
Costești is a commune located in Vâlcea County, Oltenia, Romania. It is composed of four villages: Bistrița, Costești, Văratici, and Pietreni.
The commune is located in the central-north part of the county, in the foothills of the Southern Carpathians, some west of the county seat, Râmnicu Vâlcea. The river Bistrița (also known as Bistrița Vâlceană) and its tributary, the Costești, flow through the commune.
Costești is traversed by national road, which connects Râmnicu Vâlcea to Târgu Jiu and Drobeta-Turnu Severin further west.
and Bistrița Monastery are located in Costești. Part of the Buila-Vânturarița National Park is situated on the territory of the commune.