Serbs

The most hated by the Ustase regime, Serbs made up the majority of victims throughout Jasenovac and when captured were subject to immediate execution.

Jews   

To a Nazi, the Jew was an essential political, social, and psychological tool for promoting and maintaining the Nazi grip on society. Hitler held the notion that all Jews were responsible for the economic crisis as well as the suffering defeat of Germany in World War I.

Gypsies

The Nazis saw Gypsies as asocial and inferior to Germans. Although the Gypsies were not specifically mentioned in the Nuremberg Laws, they were included in the actions of the Nazis. They were deprived of their civil rights, sent to ghettos and concentration camps, used in medical experiments, and injected with lethal substances. 30,000 German Gypsies were deported East between 1939 and 1943. Gypsies who were married to Germans were excused but were sterilized. Many were also murdered by-the Einsatzgruppen, the Nazi firing squad. They were shot naked facing their pre-dug graves for the sake of efficiency. According to Nazis, they preferred shooting the Jews because they would stand still unlike the Gypsies who would cry, scream moan, and move about. Hundreds of thousands of European Gypsies were killed during the Holocaust, most of them being gassed in Auschwitz. Generally it was assumed that Hitler believed Gypsies were not contributing to the economy.
Along with hundreds of thousands of Serbs, some 25,000 Jews and at least 30,000 Romas were murdered in these camps. The names of some 20,000 murdered children of all three nationalities collected thus far by historians provides only a hint of the scale of the crimes committed there against children. From December, 1941, to April, 1945, in Jasenovac, the Ustasha killed 19.544 boys and girls of Serbian nationality, and their identities were later established.They were executed in atrocious ways and also died, more than the adults, from illnesses, famine, thirst, and frost. The Ustasha would drown small children in the Sava by tying up several of them in a sack and throwing them into the river. Many children (about 400 of them) were slaughtered in Jasenovac in mid-September, 1942. The children taken in 15 horse-drawn carts to the brickyard and burnt. A very similar fate befell the 300 kids who executed in Gradina on the afternoon of October -N. 1942.