| Blackmill Loch | |
| Location: | Minard, Scotland |
| Coords: | 56.1107°N -5.2991°W |
| Type: | Reservoir |
| Pushpin Map: | Scotland Argyll and Bute |
| Basin Countries: | Scotland, United Kingdom |
| Area: | 130000m2 |
| Elevation: | 139m (456feet) |
Blackmill Loch is an impounding reservoir, in Argyll and Bute, Scotland. The loch was constructed in 1964 and is one source of freshwater for the Lochgair Hydroelectric Scheme. The loch feeds the River Add, when not diverted for hydroelectric purposes. It is one of the two significant forest lochs to the north of Loch Glashan, the other being Loch Bealach Ghearran.