Össsjöasjön is a small island-rich deciduous forest-fringed lake in the southwestern parts of Torpa and Vrå parishes in Kronoberg County. Its area is about 65 hectares, but the surface was somewhat larger before the attempt to dredge it in the mid-19th century. The depth is not impressive, but in places amounts to 3 and 3.5 meters. The name Össjöasjön is probably a change and extension of the name Öasjön, i.e. the lake with several islands. This name occurs in other places in the country. From Öasjön came Össjön, from which arose the farm and village name Össjöa and then from there Össjöasjön. The fishing rights in the lake belong to property owners in the villages Össjöa, Össjöhult and Mosslunda.
The area consists of Lake Össjöasjön, Össjöas part of Bäjseltasjön, Gummestasjön, Hampsjön, Össjabäcken and Gummestabäcken.
