| Sulby Reservoir | |
| Coords: | 52.4231°N -1.0358°W |
| Basin Countries: | United Kingdom |
| Pushpin Map: | Northamptonshire |
| Pushpin Map Alt: | Location of the reservoir in Northamptonshire. |
Sulby Reservoir is in the English county of Northamptonshire.
Sulby Reservoir is the higher of a pair of reservoirs owned by the Canal & River Trust - the other being Welford Reservoir - that provide water to the summit level of the Grand Union Canal by way of the navigable Welford Arm.[1]