Trnopolje camp was a concentration camp established in the village of Trnopolje near the city of Prijedor in northern Bosnia and Herzegovina in the first months of the Bosnian War. According to the local Bosnian Serb authorities Trnopolje was "a transit camp" for members of the non-Serb, mainly Bosniak, population of the Prijedor region. The camp was purportedly established and run by the authorities of Republika Srpska and local paramilitary Serb police to confine and detain members of the non-Serb (Bosniak and Bosnian Croat) civilian population found "innocent" after "investigation". The other Prijedor camps, Omarska, Keraterm and Manjača, served to detain those being "interrogated" or found "guilty" (and "awaiting trial").
Trnopolje has also been described variously as a ghetto, a prison and a detention camp. However the Report of the United Nations Commission of Experts to the Security Council (the Bassiouni Commission Report) determined that "Logor Trnopolje" was "a concentration camp", functioning as a staging area for mass deportations mainly of women, children, and elderly men, and described the Omarska and Keraterm camps to which the adult non-Serb men were taken as death camps).
The Report used the Bosnian word "logor" specifically to distinguish the Prijedor camps from the wide range of institutions encompassed by the English term "camp". The use of the term was intended to establish the link with the inhumane characteristics of their regimes.