Sudost

{{refimprove|date=April 2020}}

{{Infobox river

| name = Sudost

| native_name = {{native name|ru|Судость}}

| image = Судость в районе Юдиново.jpg

| image_caption = Sudost River

| mapframe = yes

| mapframe-zoom = 7

| source1_location = Bryansk Oblast, Russia

| mouth = Desna

| mouth_coordinates = {{Coord|52|19|56|N|33|23|54|E|source:kolossus-ruwiki|display=it}}

| subdivision_type1 = Country

| subdivision_name1 = Russia, Ukraine

| length = {{convert|208|km|abbr=on}}

| source1_elevation =

| discharge1_avg =

| basin_size = {{convert|5,850|km2|abbr=on}}

| progression = {{RDesna}}

| extra =

}}

The Sudost ({{Langx|ru|Судость}}; {{Langx|uk|Судость}}) is a river in Bryansk Oblast in Russia and Chernihiv Oblast in Ukraine. It is a right tributary of the Desna.{{cite web|url=http://bse.sci-lib.com/article107420.html |title=Судость|trans-title=Sudost|language=Russian|website=Great Soviet Encyclopedia|access-date=21 November 2020}} Some sections of the river form the Russia–Ukraine border.

The length of the Sudost is {{convert|208|km|sp=us}}. The area of its basin is approximately {{convert|5850|km2|sp=us}}. The river freezes up in November and December, and stays icebound until late March–early April.

The town of Pochep and the urban-type settlement of Pogar stand on the river.