Kočevje is a town and the seat of Municipality of Kočevje in southern Slovenia. The town is located at the foot of the Kočevski Rog karst pl…Kočevje is a town and the seat of Municipality of Kočevje in southern Slovenia. The town is located at the foot of the Kočevski Rog karst plateau on the Rinža River in the historic Lower Carniola region. It is now part of the Southeast Slovenia Statistical Region. The Rinža River flows through the town. Lake Kočejve, a former open-pit coal mine, lies northeast of the town center.