River
Oster River
199 km from source to mouth · Ukraine.
UkraineFlows into Desna
In numbers
Length
199km
Average flow
3.2m³/s
Basin
2,950km²
Drop
32m
from 130 m to 98 m
Country
1
The journey
From source to mouth
199 km of river and 5 stops on the way: 5 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmChernihiv Oblastat 130 m
- 22 kmIvanhorod1,137 people
- 67 kmLypiv Rih972 people
- 75 kmNizhyn66,981 people
- 171 kmKozelets7,968 people
- 191 kmOster5,564 people
- 199 kmDesnaat 98 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in Ukraine
At the mouth it carries 3.2 m³/s on average: an Olympic pool every 781 seconds. It drops from 130 m to 98 m, 0.2 m per kilometre on average. Its basin covers 2,950 km², about the size of LU. 3.5 million people live in it. Highest water: from April to May; lowest: from December to March. No large dam holds it back: it is one of the world's free-flowing rivers.
Where to start
- NizhynLargest city on its banks · 66,981 people
- Gomel Airport (GME)Nearest airport with scheduled flights, 175 km from the cityCar hire at KBP airport (Boryspil)Discover Cars · Affiliate link↗
- On the water1 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
- From May to SeptemberThe best months to visit
Oster River, month by month
Highest water: from April to May
Lowest water: from December to March. Freezing months (average below −4 °C): from January to February. Best months to visit: from May to September.
From about 240 m³/s in the lowest month to 830 m³/s in the highest. An estimate: the monthly flow is modelled from the lowest and highest months of WaterGAP (RiverATLAS, 1971–2000) and the rain and snow along the river (WorldClim). Dams change the real rhythm. The chip is the average air temperature; below it, the month's rain.
Plan the trip
Plan the trip: boat trips, a bed by the river, a car
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
The basin
Oster River: the basin in numbers
87,659 km² of land send their water to this river. This is what lives on it.
- 3.5millionpeople live in the basin
- 40/km²people per km²
- 176maverage altitude of the basin
- 600mmof rain a year (basin average)
- 6.1°Caverage air temperature
- 4%protected areas
- 0.3%covered by lakes
What covers the basin
- 22% Forest
- 48% Cropland
- 15% Pasture
- 2% Towns and cities
RiverATLAS (HydroATLAS v1.0, CC BY 4.0): land cover, people, protected areas, glaciers and dams over the whole basin upstream of the mouth.
Along the river
Oster River: what you find on the way
- 2Weirs
- 1Marinas
- 1River beaches
From OpenStreetMap, within 2.4 km of the river. Not mapped is not the same as not there.
From space
The source and the mouth, seen from orbit


Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0. The glowing line is the river as drawn by RiverATLAS.
Tributaries
Where it flows, and what flows into it
It flows into
DesnaTributaries (2)
Also: Nosivochka, Burchak
Nearby
Rivers nearby
Where these numbers come from
| Name, length, places | Wikidata (Q1753659) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata |
| Flow | WaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0 |
| Climate along the river | WorldClim (RiverATLAS), 1970–2000 · CC BY 4.0 |
| Towns, bridges, dams | Wikidata · CC0; GeoNames · CC BY 4.0 |
| Along the river | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
Every source and licence is on the data sources page.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.



