Omarska is a locality near Prijedor in northwestern Bosnia and Herzegovina. It includes an old iron mine and ore processing plant.

Omarska gained worldwide infamy as the location for a detention or concentration camp set up by the authorities of the Republika Srpska during the 1992-1995 war in Bosnia. It was officially termed investigation centre and the detainees were Bosnian Muslim and Croat men that the Serbs accused of paramilitary activities.

Persons indicted at the ICTY regarding the mistreatment of prisoners at Omarska have included:

• Momčilo Gruban
• Duško Knežević
• Željko Meakić

See also

• Keraterm, another camp for investigation of suspected paramilitaries
• Trnopolje, a camp for civilians
• Manjača, a camp for prisoners of war