| Busniac | |
| Name Other: | Bosnyák |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Harghita County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Sâncrai, Odorheiu Secuiesc |
| Length: | 13km (08miles) |
| Mouth: | Târnava Mare |
| Mouth Location: | Odorheiu Secuiesc |
| Mouth Coordinates: | 46.3218°N 25.3161°W |
| Basin Size: | 51km2 |
The Busniac (Hungarian: Bosnyák) is a right tributary of the river Târnava Mare in Romania. It discharges into the Târnava Mare in Odorheiu Secuiesc. Its length is 13km (08miles) and its basin size is 51km2.