| En Name: | Syagannakh |
| Ru Name: | Сыаганнах |
| Other Name: | Сыаганнаах |
| Other Lang: | Yakut |
| Coordinates: | 68.3667°N 173°W |
| Map Label Position: | top |
| Federal Subject: | Sakha Republic |
| Adm District Jur: | Abyysky District |
| Adm Selsoviet Jur: | Mugurdakhsky Rural Okrug |
| Adm Selsoviet Type: | Rural okrug |
| Adm Ctr Of: | Mugurdakhsky Rural Okrug |
| Inhabloc Cat: | Rural locality |
| Inhabloc Type: | Selo |
| Mun District Jur: | Abyysky Municipal District |
| Mun District Jur Ref: | [1] |
| Rural Settlement Jur: | Mugurdakhsky Rural Settlement |
| Mun Admctr Of: | Mugurdakhsky Rural Settlement |
| Pop 2010Census: | 421 |
| Pop Latest: | 390 |
| Pop Latest Date: | January 2016 |
| Pop Latest Ref: | [2] [3] |
| Postal Codes: | 678893 |
Syagannakh (Russian: Сыаганнах; Yakut: Сыаганнаах, Sıagannaax) is a rural locality (a selo), the only inhabited locality, and the administrative center of Mugurdakhsky Rural Okrug of Abyysky District in the Sakha Republic, Russia, located 160km (100miles) from Belaya Gora, the administrative center of the district. Its population as of the 2010 Census was 421,[4] down from 447 recorded during the 2002 Census.[5]