| Ustye | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 153km (95miles) |
| Mouth: | Kotorosl |
| Mouth Coordinates: | 57.2454°N 39.5199°W |
| Progression: | Kotorosl→ |
| Basin Size: | 2530km2 |
The Ustye (Russian: Устье) is a river in Yaroslavl Oblast in Russia, a left tributary of the river Kotorosl (Volga's basin).[1] The river is 153km (95miles) long, and the area of its drainage basin is 2530km2.[2] The Ustye freezes up in November and breaks up in April.