| Knockruan Loch | |
| Location: | Campbeltown, Scotland |
| Coords: | 55.4456°N -5.587°W |
| Type: | Reservoir |
| Pushpin Map: | Scotland Argyll and Bute |
| Basin Countries: | Scotland, United Kingdom |
| Area: | 51970m2 |
| Volume: | 104000m2 |
| Elevation: | 117m (384feet) |
Knockruan Loch is a reservoir of the impounding variety, located 2.5 kilometres north of Campbeltown, Scotland, and is one of three lochs supplying water to the town.[1] The earthfill dam is 1.82 metres high and was completed in 1931.