| En Name: | Altantsy |
| Ru Name: | Алтанцы |
| Coordinates: | 61.4667°N 160°W |
| Map Label Position: | right |
| Federal Subject: | Sakha Republic |
| Adm District Jur: | Amginsky District |
| Adm Selsoviet Jur: | Altansky Rural Okrug |
| Adm Selsoviet Type: | Rural okrug |
| Adm Ctr Of: | Altansky Rural Okrug |
| Inhabloc Cat: | Rural locality |
| Inhabloc Type: | Selo |
| Mun District Jur: | Amginsky Municipal District |
| Mun District Jur Ref: | [1] |
| Rural Settlement Jur: | Altansky Rural Settlement |
| Mun Admctr Of: | Altansky Rural Settlement |
| Pop 2010Census: | 814 |
| Pop Latest: | 744 |
| Pop Latest Date: | January 2016 |
| Pop Latest Ref: | [2] |
Altantsy (Russian: Алтанцы; Yakut: Алтан, Altan) is a rural locality (a selo), the only inhabited locality, and the administrative center of Altansky Rural Okrug in Amginsky District of the Sakha Republic, Russia, located 120km (80miles) from Amga, the administrative center of the district.[3] Its population as of the 2010 Census was 814,[4] down from 979 recorded during the 2002 Census.