| Lake Nisramont | |
| Pushpin Map: | Belgium |
| Coords: | 50.1445°N 5.6685°W |
| Type: | Freshwater artificial lake |
| Basin Countries: | , Belgium |
| Length: | 4km (02miles) |
| Width: | 0.1km (00.1miles) |
| Area: | 0.47km2 |
| Volume: | 3e6m3 |
| Elevation: | 285m (935feet) |
| Islands: | 0 |
| Cities: | La Roche-en-Ardenne |
Lake Nisramont (French: lac de Nisramont) is located in Wallonia in the south-east of Belgium on the river Ourthe in the municipality of La Roche-en-Ardenne, province of Luxembourg.
It is named after Nisramont, a village near the lake. The dam has a length of 116 m and is 16 m high. The volume of water is 3,000,000 m3 and the area of the lake is 0.47 km2. The dam has fish ladders and a hydro-electric power station. The dam was erected at the point where the Western Ourthe (Ourthe Occidentale) and Eastern Ourthe (Ourthe Orientale) merge to form the Ourthe. The lake is a tourist attraction, with water sports, including canoeing and fishing.