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Map of Finland - Oulujarvi.png
Location of Oulujärvi in Finland
Location Kainuu, Finland
Coordinates 64°20′N 027°15′E / 64.333°N 27.250°E / 64.333; 27.250Coordinates: 64°20′N 027°15′E / 64.333°N 27.250°E / 64.333; 27.250
Primary outflows Oulu River
Basin countries Finland
Surface area 928.09 km2 (358.34 sq mi)[1]
Average depth ca. 7 m (23 ft)[2]
Max. depth 38 m (125 ft)
Shore length1 1,201.17 km (746.37 mi)
Surface elevation 120.9–123.6 m (397–406 ft)[1]
Islands Manamansalo, Ärjänsaari, Toukka, Kaarresalo, Hautakaarre
Settlements Kajaani, Paltamo, Vaala
References [1][2]
1 Shore length is not a well-defined measure.

Oulujärvi (Finnish pronunciation: [ˈouluˌjærʋi], Swedish: Ule träsk) is a large lake in Finland located in the Kainuu region. With an area of 928 square kilometres (358 sq mi) it is the fifth largest lake in the country. The lake is drained by the Oulu River, which flows northwestward from the lake into the Gulf of Bothnia. Its nickname is the "Kainuu sea", and it is bordered by three municipalities: Vaala, Paltamo and Kajaani.[2] About 40 percent of the lake is in the Vaala municipality.


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