Воро́нежская о́бласть (Voronezh Oblast) is located at the border to Ukraine, at its easternmost end. It belongs to the Central Federal Distric, which forms the extreme west of present-day Russia but actually its the ceter of European Russia. The administrative center of Voronezh Oblast is the homonymous city of Voronezh. The main river is the Don, about a third of its length is in this oblast.