| En Name: | Ust-Mil |
| Ru Name: | Усть-Миль |
| Coordinates: | 59.6333°N 139°W |
| Map Label Position: | top |
| Federal Subject: | Sakha Republic |
| Adm District Jur: | Ust-Maysky District |
| Adm Selsoviet Jur: | Milsky Rural Okrug |
| Adm Selsoviet Type: | Rural okrug |
| Adm Ctr Of: | Milsky Rural Okrug |
| Inhabloc Cat: | Rural locality |
| Inhabloc Type: | Selo |
| Mun District Jur: | Ust-Maysky Municipal District |
| Mun District Jur Ref: | [1] |
| Rural Settlement Jur: | Ust-Mil Rural Settlement |
| Mun Admctr Of: | Ust-Mil Rural Settlement |
| Pop 2010Census: | 292 |
| Postal Codes: | 678622 |
Ust-Mil (Russian: Усть-Миль; Yakut: Мил, Mil) is a rural locality (a selo), the only inhabited locality, and the administrative center of Milsky Rural Okrug in Ust-Maysky District of the Sakha Republic, Russia, located 131km (81miles) from Ust-Maya, the administrative center of the district.[2] Its population as of the 2010 Census was 292,[3] down from 405 recorded during the 2002 Census. On 5 July 2022, a maximum temperature of 37.8C was registered.[4]