| Seym | |
|---|---|
 Seym in Kursk Oblast | |
| Native name | Сейм |
| Location | |
| Country | Russia, Ukraine |
| Physical characteristics | |
| Source | |
| • location | Russia-Belgorod Oblast, Kursk Oblast. Ukraine-Sumy Oblast, Chernihiv Oblast. |
| Mouth | Desna |
• coordinates | 51°27′34″N 32°33′50″E / 51.45944°N 32.56389°E |
| Length | 748 km (465 mi) |
| Basin size | 27,500 km2 (10,600 sq mi) |
| Discharge | |
| • average | 99.6 m³/s[1] |
| Basin features | |
| Progression | Desna→ Dnieper→ Dnieper–Bug estuary→ Black Sea |
| Tributaries | |
| • left | Reut, Vyr |
| • right | Tuskar, Svapa, Kleven |
The Seym or Seim (Russian: Сейм; Ukrainian: Сейм) is a west-flowing river in Russia and Ukraine. Its length is 748 kilometres (465 mi) (250 km within Ukraine) and its basin area about 27,500 square kilometres (10,600 sq mi). It is the largest tributary of the Desna.[2][3][1][4]
Places on the river are: Kursk, Kurchatov, Rylsk, Ukrainian border, Putyvl, Baturyn, junction with the Desna which continues west and south past Chernihiv to Kyiv.
