Goksjø

Goksjø is a lake on the border of Larvik Municipality and Sandefjord Municipality in Vestfold county, Norway. The 3.5 km2 lake is located about 5 km to the northwest of the town of Sandefjord and about 2.5 km to the south of the village of Kodal.

The lake Goksjø measures 5 km from north to south and it has a circumference of about 20 km. At its deepest, Goksjø is no deeper than 26 m. Goksjø sits at an elevation of 28 m above sea level. It is the largest lake in Sandefjord, and the third-largest in Vestfold County.

The lake is surrounded by rural agricultural lands, and flooding occurs on a regular basis. The lake is used for ice-skating, canoeing, swimming, fishing, and other recreational activities. Fish species found here include Northern pike, European perch, Ide, Common dace, European eel, Salmon and Brown trout.

The rivers Storelv and Skorgeelva (the two most important inlets) both flow into the northern part of the lake. The river Hagneselva is the only outlet on the lake and it is located on the northwestern part of the lake. The river flows out of the lake and later joins the lake Åsrumvannet and then it eventually flows into the river Numedalslågen. The lake's most important inlet is the river Storelv, which flows from the lake Askimvannet in Andebu.

Name
The lake name comes from the Old Norse name Gautsjór. The first element is derived from the old male name Gautr which may have been corrupted to Gok over the centuries. The last element is which means "sea" or "lake".