Define death camp please. Do you mean ones specifically designed for implementing "The Final Solution" like Auschwitz II (Auschwitz-Birkenau) or do you include more "generic" concentration camps like Mathausen, Buchenwald, and Dachau.
If you mean the strict "extermination camp" I would list the following eight:
- Auschwitz II (Auschwitz-Birkenau)
- Chelmno
- Treblinka
- Belzec
- Majdanek
- Sobibór
- Jasenovac
- Maly Trostenets