Columns: Camp | Estimated deaths | Operational | Occupied territory | Current country of location | Primary means for mass killings
Auschwitz–Birkenau | 1,100,000 | May 1940 – January 1945 | Poland | Poland | Zyklon B gas chambers | Bełżec | 600,000 | 17 March 1942 – end of June 1943 | General Government district | Poland | Carbon monoxide gas chambers | Majdanek | 360,000 | October 1, 1941 — July 22, 1944 | General Government district | Poland | Zyklon B gas chambers | Maly Trostinets | 200,000 | Summer of 1941 to 28 June 1944 | District of Reichskommissariat Ostland | Belarus | Mass shootings, Carbon monoxide van | Sajmište | 23,000 - 47,000 | 28 October 1941–July 1944 | Independent State of Croatia | Serbia | Carbon monoxide van | Sobibor | 250,000 | 16 May 1942 – 17 October 1943 | General Government district | Poland | Carbon monoxide gas chambers | Treblinka | 800,000 | 22 July 1942 – 19 October 1943 | General Government district | Poland | Carbon monoxide gas chambers