Nazi crimes against children refer to various crimes against humanity and war crimes perpetrated by the Nazi Germany against children.
The Nazis advocated killing children of unwanted or "dangerous" people in accordance with their ideological views, either as part of the Nazi idea of the racial struggle or as a measure of preventive security. They particularly targeted Jewish children (see The Holocaust), but also targeted ethnically Polish children and Romani (also called Gypsy) children and children with mental or physical disabilities. The Nazis and their collaborators killed children for these ideological reasons and in retaliation for real or alleged partisan attacks.
It is estimated that during World War II Nazis killed an estimated 2 million of Polish and Polish Jewish children in occupied Polish territories. 1.5 million of Jewish children perished in the Holocaust; tens of thousands of Romani (Gypsy) children died in the Romani Holocaust, between 5,000 to 25,000 disabled children were killed as part of their children euthanasia program. 200,000 mostly ethnic Polish children were kidnapped for the purpose of forced Germanization. Others were subject to forced labor.