| Buynovska | |
| Mouth Location: | Vacha |
| Mouth Coordinates: | 41.6719°N 24.3533°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Bulgaria |
The Buynovska (Bulgarian: Буйновска река) is a river of Plovdiv Province, Bulgaria. It is one of the source rivers of the Vacha and is joined by the Trigrad Gorge.