| En Name: | Ust-Kuyga |
| Ru Name: | Усть-Куйга |
| Loc Name1: | Уус Куйга |
| Loc Lang1: | Yakut |
| Coordinates: | 70°N 170°W |
| Map Label Position: | right |
| Federal Subject: | Sakha Republic |
| Adm District Jur: | Ust-Yansky District |
| Adm Selsoviet Jur: | Ust-Kuyga |
| Adm Selsoviet Type: | Settlement |
| Adm Ctr Of: | Settlement of Ust-Kuyga |
| Inhabloc Cat: | Urban-type settlement |
| Mun District Jur: | Ust-Yansky Municipal District |
| Urban Settlement Jur: | Ust-Kuyga Urban Settlement |
| Mun Admctr Of: | Ust-Kuyga Urban Settlement |
| Pop 2010Census: | 979 |
| Current Cat Date: | 1967 |
| Postal Codes: | 678550 |
| Bodystyle: | width:23.5em; |
| Ust-Kuyga population | |
| Label1: | 2010 Census |
| Data1: | 979 |
| Label2: | 2002 Census |
| Data2: | 1,568 |
| Label3: | 1989 Census |
| Data3: | 5,342 |
| Label4: | 1979 Census |
| Data4: | 2,700 |
Ust-Kuyga (Russian: Усть-Куйга́; Yakut: Уус Куйга|translit=Uus Kuyga) is an urban locality (an urban-type settlement) in Ust-Yansky District of the Sakha Republic, Russia.[1] on the Yana River. As of the 2010 Census, its population was 979.
The settlement is located by the Kyundyulyun mountains, 224km (139miles) from Deputatsky, the administrative center of the district,[1]
Urban-type settlement status was granted to Ust-Kuyga in 1967.
Within the framework of administrative divisions, the urban-type settlement of Ust-Kuyga[2] is incorporated within Ust-Yansky District as the Settlement of Ust-Kuyga. As a municipal division, the Settlement of Ust-Kuyga is incorporated within Ust-Yansky Municipal District as Ust-Kuyga Urban Settlement.[3]
Ust-Kuyga is served by the Ust-Kuyga Airport .