| En Name: | Troitsk |
| Ru Name: | Троицк |
| Coordinates: | 60.35°N 160°W |
| Map Label Position: | left |
| Federal Subject: | Sakha Republic |
| Adm District Jur: | Olyokminsky District |
| Adm Selsoviet Jur: | Troitsky Rural Okrug |
| Adm Selsoviet Type: | Rural okrug |
| Adm Ctr Of: | Troitsky Rural Okrug |
| Inhabloc Cat: | Rural locality |
| Inhabloc Type: | Selo |
| Mun District Jur: | Olyokminsky Municipal District |
| Mun District Jur Ref: | [1] |
| Rural Settlement Jur: | Troitsky Rural Settlement |
| Mun Admctr Of: | Troitsky Rural Settlement |
| Pop 2010Census: | 353 |
| Postal Codes: | 678115 |
Troitsk (Russian: Троицк) is a rural locality (a selo), the only inhabited locality, and the administrative center of Troitsky Rural Okrug of Olyokminsky District in the Sakha Republic, Russia, located 18km (11miles) from Olyokminsk, the administrative center of the district. Its population as of the 2010 Census was 353,[2] of whom 187 were male and 166 female, down from 388 as recorded during the 2002 Census.[3]