It borders to Lake Mälaren in the north and the Baltic Sea in the south, and within the Stockholm County to Nykvarn Municipality and Salem Municipality and also border Södermanland County and its municipals Gnesta and Trosa.
It borders to Lake Mälaren in the north and the Baltic Sea in the south and within the Stockholm County to Nykvarn Municipality and Salem Municipality and also border Södermanland County and its municipals Gnesta and Trosa