Blåsjø

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Blåsjø
Location Bykle, Aust-Agder and Hjelmeland, Suldal, Rogaland
Coordinates 59°22′14″N, 06°52′48″ECoordinates: 59°22′14″N, 06°52′48″E
Surface area 84.48 km²
Shore length1 200.41 km
Surface elevation 1055 m
1 Shore length is an imprecise measure which may not be standardized for this article.

Blåsjø is the tenth largest lake by area in the municipality of Bykle in Aust-Agder county and the municipalities of Hjelmeland and Suldal in Rogaland county. It has a surface area of 84.48 km². It lies 1055 m above sea level and has a shoreline of 200.41 km.

Blåsjø is regulated and functions as a reservoir for Ulla-Førreverkene hydroelectric power generation. The lake has an annual energy generation potential of about 7.8  TW•h.