Order Police battalions were battalion-sized militarised units of Nazi Germany's Ordnungspolizei which existed during World War II from 1939 to 1945.

Alongside the Einsatzgruppen, Waffen-SS and Wehrmacht, these units were involved in perpetrating the Holocaust and were responsible for large-scale crimes against humanity against civilian populations under German occupation.

Two battalions were assigned to support the Einsatzgruppen, the mobile death squads of the SS, and the Organisation Todt, the military construction group.

[5] The goals of the police battalions were to secure the rear by eliminating the remnants of the enemy forces, guarding the prisoners of war, and protecting the lines of communications and captured industrial facilities.

When the units crossed the German-Soviet border, they came under the control of the Higher SS and Police Leader (HSS-PF) for the respective Army Group Centre Rear Areas.