| Kilglass Lough | |
| Pushpin Map: | Island of Ireland |
| Pushpin Map Alt: | Kilglass Lough location in Ireland |
| Pushpin Label Position: | none |
| Pushpin Map Caption: | Location in Ireland |
| Location: | County Roscommon |
| Catchment: | 230.3km2 |
| Basin Countries: | Ireland |
| Length: | 3.8km (02.4miles) |
| Width: | 0.9km (00.6miles) |
| Area: | 2.02km2 |
| Elevation: | 38m (125feet) |
Kilglass Lough is a freshwater lake in the west of Ireland. It is located in north County Roscommon.
Kilglass Lough measures about 4km (02miles) long and 1km (01miles) wide. It is located about 10km (10miles) northeast of Strokestown. The lake is part of a system of lakes collectively known as the Strokestown Lakes.
Fish species in Kilglass Lough include pike, bream, roach, tench and rudd.