The Treblinka concentration camp, located in Nazi-occupied Poland during World War II, was primarily a death camp where prisoners were sent to be killed. The vast majority of the inmates at Treblinka were Jewish men, women, and children who were rounded up from ghettos and transported to the camp to be murdered in gas chambers.
In addition to Jewish prisoners, there were also some Roma (Gypsy) people and Soviet prisoners of war who were sent to Treblinka. The Nazis also used a small number of non-Jewish prisoners to perform various tasks within the camp, such as sorting and processing the belongings of the victims. However, the overwhelming majority of the inmates at Treblinka were Jews who were systematically murdered as part of the Nazi regime's genocidal campaign against European Jewry.