Larviksfjorden is a fjord in Larvik Municipality in Vestfold county, Norway. The 8-kilometre (5.0 mi) long fjord is about 3 kilometres (1.9 mi) wide at its mouth where it flows out into the Skaggerak. The fjord reaches a depth of 100 metres (330 ft) below sea level. The rivers Numedalslågen and Farriselva both discharge into the fjord. The towns Stavern and Larvik both border to the fjord. The two lighthouses Stavernsodden and Svenner are located near the mouth of the fjord.

• List of Norwegian fjords