| Tverråga | |
| Pushpin Map: | Nordland#Norway |
| Pushpin Map Caption: | Location of the river |
| Subdivision Type1: | Country |
| Subdivision Name1: | Norway |
| Subdivision Type2: | County |
| Subdivision Name2: | Nordland |
| Subdivision Type3: | Municipalities |
| Subdivision Name3: | Rana Municipality |
| Length: | 30km (20miles) |
| Source1: | Tverrvatnet |
| Source1 Location: | Rana, Norway |
| Source1 Coordinates: | 66.2542°N 14.5433°W |
| Mouth: | Ranelva |
| Mouth Location: | Mo i Rana, Norway |
| Mouth Coordinates: | 66.3217°N 14.1784°W |
| River System: | Ranelva |
| Basin Size: | 196km2 |
Tverråga is a river in the municipality of Rana in Nordland county, Norway. The river flows from lake Tverrvatnet north until it joins the river Ranelva. The river absorbs seven other rivers during its course, the last one by Hamaren near the village of Gruben.
The Svenskvegen bridge connecting the European route E6 highway to the village of Gruben to the east marks a name change on the bridge. South of the bridge this river is the Tverråga, but the remaining section of the river to the north of the bridge is called the river Revelelva. The 800m (2,600feet) long Revelelva then flows into the river Ranelva.[1]