| River Allen | |
|---|---|
 River Allen from the Cupola Bridge 54°55′36″N 2°18′50″W / 54.926596°N 2.313870°W | |
  Location within Northumberland | |
| Location | |
| Country | United Kingdom |
| County | Northumberland |
| Physical characteristics | |
| Mouth | |
• coordinates | 54°58′38″N 2°18′41″W / 54.9771°N 2.3115°W |
| Length | 5 miles (8 km) |
| Basin features | |
| River system | River Tyne |
The River Allen is a river in the English county of Northumberland. The river has its sources in the hills of the Northern Pennines, and is formed by the confluence of the East and West Allen rivers. The Allen is itself, a tributary of the River Tyne. The Allen was formerly very polluted from mining activity upstream, but remediation schemes have been implemented to allow the water quality to improve.
The river is home to a variety of wildlife including voles and otters.