| Ulley Reservoir | |
|---|---|
 Ulley Reservoir | |
  Ulley Reservoir Location in South Yorkshire | |
| Location | South Yorkshire |
| Coordinates | 53°22′48″N 1°18′50″W / 53.3800°N 1.3140°W |
| Type | reservoir |
| Primary inflows | Ulley and Morthen brooks |
| Basin countries | United Kingdom |
| Surface area | 35 acres (14 ha) |
| Average depth | 46 feet (14 m) |
Ulley Reservoir is a reservoir a few hundred yards to the west and downhill of the village of Ulley, 4 miles (6.4 km) south of Rotherham, South Yorkshire, England. It is 2.5 miles (4 km) away from junction 33 of the M1 motorway.