Pinneberg is a district in Schleswig-Holstein, Germany. It is bounded by the districts of Steinburg and Segeberg, the city of Hamburg and the state of Lower Saxony. The island of Heligoland is also part of the district.
Wikipedia https://en.wikipedia.org/wiki/Pinneberg_(district)
Coordinates 53°42'59.176" N 9°44'18.347" E