Jasenovac was a concentration and extermination camp established in the village of the same name by the authorities of the Independent State of Croatia (NDH) in occupied Yugoslavia during World War II. The concentration camp, one of the ten largest in Europe, was established and operated by the governing Ustaše regime, Europe's only Nazi collaborationist regime that operated its own extermination camps, for Serbs, Romani, Jews, and political dissidents. It quickly grew into the third largest concentration camp in Europe.

Jasenovac is a village and a municipality in Croatia, in the southern part of the Sisak-Moslavina County at the confluence of the river Una into Sava. In Croatian and Serbian word "jasen" means ash tree and the name Jasenovac means "ashen, or made of ash tree". During World War II, it was the site of the Jasenovac concentration camp.