| Grand Étang | |
| Location: | Réunion |
| Pushpin Map: | Réunion |
| Coords: | -21.0961°N 55.6403°W |
| Inflow: | Bras d'Annette |
| Basin Countries: | France (Réunion) |
| Elevation: | 525m (1,722feet) |
| Cities: | Saint-Benoît |
Grand Étang (large pond in English) is the largest lake on the island of Réunion, a French territory in the western Indian Ocean. It lies in the commune of Saint-Benoît, close to La Plaine-des-Palmistes, in the eastern part of the island. Its inflow is a short creek from the waterfall Cascade Biberon of the Bras d'Annette creek. It was created by a lava flow acting as a natural dam afterwards. It does not have an outflow.