Kösen is a lake southwest of Ljungby in Ljungby municipality, Kronoberg County. The lake is located along Bolmån which flows in from the west of Bolmen and flows out south towards Exen and Lagan. The lake's surface area is 11.75 square kilometers with a maximum depth of 22 meters.
Kösen offers fine fishing for several species, including; zander, pike, perch, trout, bream, roach, eel and tench.
It is easy to get to the lake by car.
