Nykvarn Municipality is a municipality in Stockholm County in east central Sweden. Its seat is located in the town of Nykvarn.
Nykvarn is a young municipality, and is the result of the splitting of Södertälje Municipality in 1999. Nykvarn can be regarded as a totally new municipality, because there was never before an entity with that territory or that name.
The municipality has a significant population increase in the summer thanks to tourism.
Wikipedia https://en.wikipedia.org/wiki/Nykvarn_Municipality
Coordinates 59°11'37.628" N 17°23'41.94" E