Kullsvik is a bay 20 kilometers south of Gothenburg in Sweden in the Kungsbacka municipality and the Kullavik area.
The city Koningsbakkae was during the Middle Ages, a Danish border trade point and over a period of Denmark’s smallest town. The first mention of the town is from 1366 and refers to the fortress, Kungsbackahus, located between Kungsbackaån and Söderån. It is unclear when Kungsbacka received its charter, but the first recorded document that describes Kungsbacka as a city is dated to 13 December 1408th
Kullsvik have proud traditions including midsummer celebrations and light festivities arranged by Kullsviks Badförening, http://www.kullsviksbadet.se.