How many Jewish ghettos were in Poland?
In total, there were over 540 Jewish ghettos in the entire Nazi empire, which sent the majority of the Jews to their deaths. Over 2 million Polish Jews died in the death camps, which operated in conjunction with certain ghettos. Most ghettos were 'closed' (sealed off with high walls and barbed wire) as in the case of Lodz, Czestochowa, Warsaw, Krakow while others remained 'open' as in Sosnowiec, until the actual deportation of Jews occurred.