The established list of general concentration camps is as follows:
Augustów II, Ciechanów, Dobrzyń; Dyle near Biłgoraj, Działdowo II, Dziesiąta near Lublin, Grudziądz, Jasło, Kołdyczewo near Baranowicze, Łódź, Majdanek II, Nasielsk, Oświęcim, Pełkinia, Płońsk, Potulice I near Nakło, Pomiechówek I, Sierpc, Sosnowiec II, Tarnów II,
Treblinka I, Trawniki near Lublin, camp near Włocławek, camp near Chełm.
[...]
These camps were established during the mass deportations of the rural population. Peasants were imprisoned in them. Several large camps of this type existed:
Potulice II, Starogard I,
Treblinka II.
[...]
The camps were established in connection with the extermination of Jews in Europe. Some of them are essentially execution sites where Jews from Polish ghettos and from all over Europe were murdered using poison gas, electric current, and machine guns. Three such camps gained the greatest notoriety as death camps:
Bełżec, Sobibór near Włodawa, and
Treblinka III near Małkinia.
Dziennik Polski (London). “Over 100 Concentration Camps in Poland.” October 5, 1943. Number 994 Edition. Originally published as
PONAD 100 OBOZOW koncentracyjnych w Polsce.
https://sbc.org.pl/dlibra/publication/419141.