| Lake Genval | |
| Coords: | 50.7289°N 4.5194°W |
| Type: | Freshwater artificial lake |
| Pushpin Map: | Belgium |
| Basin Countries: | Belgium |
| Length: | 1km (01miles) |
| Width: | 0.25km (00.16miles) |
| Area: | 18ha |
| Elevation: | 55m (180feet) |
| Islands: | 1 |
| Cities: | Rixensart, Overijse |
Lake Genval (Dutch; Flemish: Meer van Genval, French: Lac de Genval) is an artificial lake located in Belgium on the border between Flanders and Wallonia, southeast of Brussels near the Sonian Forest, which is a part of the municipalities of Rixensart, Walloon Brabant and Overijse, Flemish Brabant. A popular vacation and holiday destination, the lake is surrounded by turn-of-the-century homes built during the Belle Époque. Situated on the lake's south is the Château du Lac, a five-star hotel, restaurant, and bar.