The Oster () is a

river A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of ...

in the northern Ukrainian oblast of

Chernihiv Chernihiv (, ; , ) is a city and municipality in northern Ukraine, which serves as the administrative center of Chernihiv Oblast and Chernihiv Raion within the oblast. Chernihiv's population is The city was designated as a Hero City of Ukraine ...

. The river is a left tributary of the

Desna River The Desna ( Russian and ) is a river in Russia and Ukraine, a major left-tributary of the Dnieper. Its name in means "right hand". It has a length of , and its drainage basin covers .Trubizh River The Trubizh (, ) is a river entirely located in Ukraine, a left tributary of Dnieper. It falls into the Dnieper's Kaniv Reservoir (named after Kaniv). It is long, and has a drainage basin of .Kyiv Kyiv, also Kiev, is the capital and most populous List of cities in Ukraine, city of Ukraine. Located in the north-central part of the country, it straddles both sides of the Dnieper, Dnieper River. As of 1 January 2022, its population was 2, ...

into the

Dnieper River The Dnieper or Dnepr ( ), also called Dnipro ( ), is one of the major transboundary rivers of Europe, rising in the Valdai Hills near Smolensk, Russia, before flowing through Belarus and Ukraine to the Black Sea. Approximately long, with ...

. Important towns and villages on the river include:

Nizhyn Nizhyn (, ; ) is a city located in Chernihiv Oblast of northern Ukraine along the Oster River. The city is located north-east of the national capital Kyiv. Nizhyn serves as the capital city, administrative center of Nizhyn Raion. It hosts the ...

Kozelets Kozelets (, ) is a rural settlement in Chernihiv Raion, Chernihiv Oblast, northern Ukraine. It hosts the administration of Kozelets settlement hromada, one of the hromadas of Ukraine. Kozelets is located on the Oster River, a tributary of the Dn ...

Roslavl Roslavl (, ) is a town and the administrative center of Roslavlsky District in Smolensk Oblast, Russia. It is a road and rail junction and a market town. Population: History Roslavl was founded as Rostislavl in the 1130s or 1140s. The name is ...

and

Oster Oster (, ; ) is a city in Chernihiv Raion, Chernihiv Oblast, Ukraine. It is located where the Oster River flows into the Desna. Oster hosts the administration of Oster urban hromada, one of the hromadas of Ukraine. Its population is Today O ...

References

Rivers of Chernihiv Oblast {{Ukraine-river-stub