Vytegorsky District
The river basin of the Kovzha comprises the central part of Vytegorsky District, the western part of Vashkinsky District, and the northern part of Belozersky District. It is limited in the east by the river basin of the Kema, in the north and the west by the river basins of tributaries of Lake Onega, most notably the Vytegra, and in the south by the basin of the Megra, another tributary of lake Beloye.