| En Name: | Terbyas |
| Ru Name: | Тербяс |
| Other Name: | Тылгыны |
| Other Lang: | Sakha |
| Coordinates: | 64.3728°N 120.5494°W |
| Map Label Position: | left |
| Federal Subject: | Sakha Republic |
| Adm District Jur: | Vilyuysky District |
| Adm Selsoviet Jur: | Tylgyninsky Rural Okrug |
| Adm Selsoviet Type: | Rural okrug |
| Adm Ctr Of: | Tylgyninsky Rural Okrug |
| Inhabloc Cat: | Rural locality |
| Inhabloc Type: | Selo |
| Mun District Jur: | Vilyuysky Municipal District |
| Mun District Jur Ref: | [1] |
| Rural Settlement Jur: | Tylgyninsky Rural Settlement |
| Mun Admctr Of: | Tylgyninsky Rural Settlement |
| Pop 2010Census: | 644 |
Terbyas (ru|Тербяс; sah|Тылгыны, Tılgını) is a rural locality (a selo), the only inhabited locality, and the administrative center of Tylgyninsky Rural Okrug of Vilyuysky District in the Sakha Republic, Russia, located 180km (110miles) from Vilyuysk, the administrative center of the district. Its population as of the 2010 Census was 644,[2] of whom 300 were male and 344 female, down from 710 as recorded during the 2002 Census.[3]