The Police Battalion 303 (Polizeibattalion 303) was a formation of the German Order Police (uniformed police) during the Nazi era. During Operation Barbarossa, it was subordinated to the SS and deployed in German-occupied areas, specifically the Army Group Centre Rear Area, of the Soviet Union, as part of Police Regiment South. Alongside detachments from the Einsatzgruppen of the SD and the 1st SS Infantry Brigade of the Waffen-SS, it perpetrated mass murder in the Holocaust and was responsible for large-scale crimes against humanity targeting civilian populations.