Rivers of Oulu

Oulujoki () is a river in North Ostrobothnia, Finland. Its name in Finnish literally means "Oulu River", originally in old Northern Ostrobothnian dialect literally "Flood River". Its origin is Oulujärvi, and its watershed area covers a significant part of Kainuu region. It flows into the Bothnian Bay at Oulu. Port of Oulu is located at the mouth of the river.

Iijoki () is a river of Finland in the region of North Ostrobothnia. The river has many tributaries. It flows for into the Gulf of Bothnia. Some of its main tributaries are Siuruanjoki and Livojoki. It has about 150 rapids.