| Uil | |
| Other Name: | Ойыл |
| Source1: | Sub-Ural Plateau |
| Source1 Coordinates: | 49.5333°N 104°W |
| Mouth: | Aktobe |
| Mouth Coordinates: | 48.541°N 52.4041°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Kazakhstan |
| Length: | 800km (500miles) |
| Basin Size: | 31500km2 |
| Pushpin Map: | Kazakhstan |
| Pushpin Map Caption: | Mouth location in Kazakhstan |
The Uil (Kazakh: Ойыл|translit=Oyyl; Russian: Уил|translit=Uil) is a river of Aktobe, Atyrau and West Kazakhstan regions, Kazakhstan. It is long, and has a drainage basin of .[1]
It has its sources in the Mugodzhar Hills and has many tributaries. Finally it discharges into lake Aktobe in the Caspian Depression.[2] [3]
