| Bucieș | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Bacău County |
| Length: | 8km (05miles) |
| Mouth: | Cașin |
| Mouth Coordinates: | 46.0863°N 26.5815°W |
| Basin Size: | 29km2 |
The Bucieș is a left tributary of the river Cașin in Romania.[1] It flows into the Cașin near Scutaru. Its length is 8km (05miles) and its basin size is 29km2.