Brčko, internationally supervised self-governing district (2013 pop. 93,028), NE Bosnia and Herzegovina on the Sava River, part of both the Federation of Bosnia and Herzegovina and the Serbian Republic. The town of Brčko, a trade center with road, river, and rail links, is the seat of government. The district lies on the narrowest part of the Posavina Corridor, a strategic east-west route that connects the north and east sections of the Serbian Republic. The population consists of Bosniaks, Croats, and Serbs. Following the end of the Bosnian war in 1995, the Brčko district was formed to replace the former Brčko municipality, whose control was disputed between the Serbian Republic and the Bosniak-Croat Federation; it was the only part of Bosnia and Herzegovina whose status was not finalized in the Dayton peace accords. An agreement on its status was reached in 1999.
See M. Parish, A Free City in the Balkans: Reconstructing a Divided Society in Bosnia (2009).