| Vuka | |
| Mouth Location: | Danube |
| Mouth Coordinates: | 45.3525°N 19.0052°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Croatia |
| Length: | 112km (70miles) |
| Basin Size: | 644km2 |
Vuka is a river in eastern Croatia, a right tributary of the Danube river. At 112km (70miles), it is the 13th-longest river flowing through Croatia and it has a drainage area of 644km2. The river is located in Vukovar-Srijem County, in the Slavonia region. It empties into the Danube at the town of Vukovar, which is named for the river.
The ancient name of Pannonian Illyrians for Vuka was Volcos.