| Middle River Reservoir | |
| Location Map: | South Australia |
| Location Map Caption: | Location in South Australia |
| Location: | Middle River, South Australia[1] |
| Opening: | 1968 |
| Res Capacity Total: | 540 Ml |
| Res Catchment: | Middle River |
| Coordinates: | -35.719°N 137.096°W |
The Middle River Reservoir is located on the north of Kangaroo Island in South Australia. It is situated on the Middle River and has a catchment of approximately .
Construction of Middle River Reservoir was started in response to a doubling of the population on Kangaroo Island following the Second World War.[2] The reservoir supplies water to Kingscote, Brownlow KI and Parndana.[3]