Kajaani (river)

Kajaani
Timber floating in the Ämmäkoski rapids
Map
Location
CountryFinland
Physical characteristics
Source 
 • locationLake Nuasjärvi
Mouth 
 • location
Lake Oulujärvi
Illustration in Finland framstäldt i teckningar edited by Zacharias Topelius and published 1845-1852.

The Kajaani, Finnish: Kajaaninjoki; Swedish: Kajana älv, is a river in the region of Kainuu, Finland.

The river runs from Lake Nuasjärvi to Lake Oulujärvi through the town of Kajaani. From there the waters flow through the Oulujoki river into the Gulf of Bothnia. The river drains a chain of lakes that originates in the municipalities of Kuhmo and Sotkamo in Kainuu (Finnish: Sotkamon reitti).