| Băgaciu | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Mureș County |
| Length: | 10km (10miles) |
| Mouth: | Târnava Mică |
| Mouth Location: | Gănești |
| Mouth Coordinates: | 46.3365°N 24.359°W |
| Basin Size: | 31km2 |
The Băgaciu is a left tributary of the river Târnava Mică in Romania. It discharges into the Târnava Mică in Gănești.[1] Its length is 10km (10miles) and its basin size is 31km2.