| Lettercraffroe Lough | |
| Pushpin Map: | Island of Ireland |
| Pushpin Map Alt: | Lettercraffroe Lough location in Ireland |
| Pushpin Label Position: | none |
| Pushpin Map Caption: | Location in Ireland |
| Location: | County Galway |
| Catchment: | 4.25km2 |
| Basin Countries: | Ireland |
| Length: | 1.6km (01miles) |
| Width: | 0.9km (00.6miles) |
| Area: | 0.82km2 |
| Depth: | 2.86m (09.38feet) |
| Max-Depth: | 17.9m (58.7feet) |
| Elevation: | 160m (530feet) |
Lettercraffroe Lough is a freshwater lake in the west of Ireland. It is located in the Connemara area of County Galway.
Lettercraffroe Lough measures about 2km (01miles) long and 1km (01miles) wide. It is located about 10km (10miles) southwest of Oughterard and about 40km (30miles) northwest of Galway city.
Fish species in Lettercraffroe Lough include roach, brown trout and three-spined stickleback. Lettercraffroe Lough is part of the Connemara Bog Complex Special Area of Conservation.