Uckermark is a Kreis (district) in the northeastern part of Brandenburg, Germany. Neighboring districts are (clockwise from the south) Barnim and Oberhavel, the districts Mecklenburgische Seenplatte and Vorpommern-Greifswald in Mecklenburg-Vorpommern, and to the east Poland (Police County and Gryfino County). It is the largest district of Germany areawise. The district is named after the historical region of Uckermark.