Larvik is a town and municipality in the county of Vestfold, Norway, located approximately 105 kilometres (65 miles) southwest of Oslo. The municipality covers an area of 530 square kilometres, and has a population of 41,211 (23,100 of which in the town). The municipality is the product of a merger in 1988 between the five former municipalities of Larvik, Stavern, Brunlanes, Tjølling and Hedrum.