Rivers of Kostroma Oblast

The Volga (, ) is the longest river in Europe and the longest endorheic basin river in the world. Situated in Russia, it flows through Central Russia to Southern Russia and into the Caspian Sea. The Volga has a length of , and a catchment area of . It is also Europe's largest river in terms of average discharge at delta – between per second – and of drainage basin. It is widely regarded as the national river of Russia. The hypothetical old Russian state, the Rus' Khaganate, arose along the Volga . Historically, the river served as an important meeting place of various Eurasian civilizations.

river in Kirov, Kostroma, and Nizhny Novgorod Oblasts, Russia

river in Kostroma and Yaroslavl Oblasts, Russia

The Unzha () is a river in the Vologda and Kostroma oblasts of Russia. It is a tributary of the Volga, which it enters at the Gorky Reservoir. It is long, and its basin covers . The Unzha begins at the confluence of the rivers Kema and the Lundonga. It flows into the Unzhensky Cove of the Gorky Reservoir.

river in Kostroma Oblast, Russia, tributary of Unzha

The Nyomda () is a river in Kostroma Oblast and Ivanovo Oblast in Russia, a left tributary of the Volga. It flows into the Nyomda Bay of the Gorky Reservoir of the Volga River. The river is long, and its drainage basin covers .

river in Kostroma Oblast, Russia

The Tolshma () is a river in Soligalichsky District of Kostroma Oblast and Totemsky District of Vologda Oblast in Russia. It is a right tributary of the Sukhona. The river is long. The area of its basin is . The principal tributary is the Yelshma (right).

The Vyoksa () is a river running in the western part of the Kostroma Oblast in Central Russia. The river originates at the outflow of Lake Galichskoye. It drains into the Kostroma on the left bank in the town of Buy. It is long, and has a drainage basin of .

river in Kostroma Oblast, Russia

river in Kostroma Oblast, Russia, tributary of Kostroma