| Rusca | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Caraș-Severin County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Rușchița, Rusca Montană |
| Length: | 21km (13miles) |
| Source1: | Poiana Ruscă Mountains |
| Mouth: | Bistra |
| Mouth Location: | Voislova |
| Mouth Coordinates: | 45.5314°N 22.4609°W |
| Basin Size: | 166km2 |
| Tributaries Left: | Miclăuș, Ciotorog, Loznișoara, Valea Mărului |
| Tributaries Right: | Lozna |
The Rusca is a right tributary of the river Bistra in Romania. It discharges into the Bistra in Voislova.[1] Its length is 21km (13miles) and its basin size is 166km2.