Sededema

General data
- Water type: River
- Progression: Kolyma -> East Siberian Sea -> Arctic ocean -> Planet Earth
- Climates: Subpolar
- Continents: Asia
- Countries: Russia
Description
The Sededema (Russian: Седедема; Yakut: Сэдэдэмэ, Sededeme) is a river in Sakha Republic, Russia. It is a left tributary of the Kolyma. It is 567 kilometres long, and has a drainage basin of 18,500 square kilometres.