Larvik (ˈlɑ̂rviːk) is a town and municipality in Vestfold in Vestfold og Telemark county, Norway. The administrative centre of the municipality is the city of Larvik. The municipality of Larvik has about 48,246 inhabitants. The municipality has a 110km coastline, only shorter than that of neighbouring Sandefjord.
The city achieved market town status in 1671. Larvik was established as a municipality on 1 January 1838 (see formannskapsdistrikt). The city of Stavern, and the rural municipalities of Brunlanes, Hedrum, and Tjølling were forcefully merged into the municipality of Larvik on 1 January 1988. On 1 January 2018, neighboring Lardal was merged into Larvik as part of a nationwide municipal reform. After the merge, Larvik is the largest municipality in Vestfold by area, and the second-most populous municipality in the Vestfold district.
Larvik is known as the hometown of Thor Heyerdahl. It is also home to Bøkeskogen, the northernmost beech tree forest in the world. It is also home of Norway's only natural mineral water spring, Farriskilden. Farris Bad has been described as one of the best spas in Europe. It has the largest spa department in Scandinavia.
Larvik has a daily ferry connection to Hirtshals, Denmark.
The Norse form of the name must have been Lagarvík. The first element is the genitive case of lǫgr m 'water; river' (now called Numedalslågen River). The second element is vík f 'cove, wick'. The meaning of the name is "the cove at the mouth of (Numedals)lågen". Prior to 1889, the name was written "Laurvik" or "Laurvig". Lardal
The coat of arms is from only 2017. It is blue, with silver drops to represent waterways, harbour and growth for which the municipality is known.
Various remains from the Stone Age have been discovered in Larvik, for instance by Torpevannet by Helgeroa village. Raet goes through all of Vestfold County before peaking out of the ocean in Mølen. Ancient peoples have carried rocks from Raet and constructed vast numbers of burial mounds at Mølen.