Oker River

General data
- Water type: River
- Progression: Aller River -> Weser -> Wadden Sea -> North Sea -> Atlantic Ocean -> Planet Earth
- Climates: Continental, Mountain
- Continents: Europe
- Countries: Germany
Description
The Oker is a river in Lower Saxony, Germany, that has historically formed an important political boundary. It is a left tributary of the River Aller, 128 km in length and runs in a generally northerly direction.