Cerna is a village and a municipality in eastern Croatia. It is located half-way between the cities of Vinkovci and Županja. It is located on four r…Cerna is a village and a municipality in eastern Croatia. It is located half-way between the cities of Vinkovci and Županja. It is located on four rivers, Biđ, Bosut, Berava, Bitulja, Krajc channel and Kaluđer channel.