From the Wikipedia page [1]
Oberhavel is a Kreis (district) in the northern part of Brandenburg, Germany. Its neighbouring districts are (clockwise from the north): Mecklenburg-Strelitz in Mecklenburg-Western Pomerania, the districts of Uckermark and Barnim, the Bundesland of Berlin, and the districts of Havelland and Ostprignitz-Ruppin.