| En Name: | Ulu-Sysy |
| Ru Name: | Улу-Сысы |
| Coordinates: | 62.7°N 155°W |
| Map Label Position: | right |
| Federal Subject: | Sakha Republic |
| Adm District Jur: | Gorny District |
| Adm Selsoviet Jur: | Odununsky Rural Okrug |
| Adm Selsoviet Type: | Rural okrug |
| Inhabloc Cat: | Rural locality |
| Inhabloc Type: | Selo |
| Mun District Jur: | Gorny Municipal District |
| Mun District Jur Ref: | [1] |
| Rural Settlement Jur: | Odununsky Rural Settlement |
| Pop 2002Census: | 22 |
Ulu-Sysy (Russian: Улу-Сысы; Yakut: Улуу Сыһыы, Uluu Sıhıı) is a rural locality (a selo) in Odununsky Rural Okrug of Gorny District in the Sakha Republic, Russia, located 187km (116miles) from Berdigestyakh, the administrative center of the district and 100km (100miles) from Magaras, the administrative center of the rural okrug.[2] Its population as of the 2002 Census was 22.