| En Name: | Sayylyk |
| Ru Name: | Сайылык |
| Other Name: | Сайылык |
| Other Lang: | Sakha |
| Coordinates: | 68.9667°N 162°W |
| Map Label Position: | right |
| Federal Subject: | Sakha Republic |
| Adm District Jur: | Ust-Yansky District |
| Adm Selsoviet Jur: | Silyannyakhsky Rural Okrug |
| Adm Selsoviet Type: | Rural okrug |
| Adm Ctr Of: | Silyannyakhsky Rural Okrug |
| Inhabloc Cat: | Rural locality |
| Inhabloc Type: | Selo |
| Mun District Jur: | Ust-Yansky Municipal District |
| Mun District Jur Ref: | [1] |
| Rural Settlement Jur: | Silyannyakhsky Rural Settlement |
| Mun Admctr Of: | Silyannyakhsky Rural Settlement |
| Pop 2010Census: | 771 |
| Postal Codes: | 678552 |
Sayylyk (Russian: Сайылык; Yakut: Сайылык, Sayılık) is a rural locality (a selo), the only inhabited locality, and the administrative center of Silyannyakhsky Rural Okrug of Ust-Yansky District in the Sakha Republic, Russia, located 120km (80miles) from Deputatsky, the administrative center of the district.[2] Its population as of the 2010 Census was 771,[3] down from 960 recorded during the 2002 Census.
It is the only inhabited place by the Selennyakh River.