| Lac de Saint-Agnan | |
|---|---|
 | |
  Lac de Saint-Agnan | |
| Location | Nièvre |
| Coordinates | 47°19′43″N 4°5′21″E / 47.32861°N 4.08917°E |
| Type | artificial |
| Primary inflows | Cousin, Trinquelin |
| Primary outflows | Cousin |
| Basin countries | France |
| Max. length | 2.5 km (1.6 mi) |
| Max. width | 0.5 km (0.31 mi) |
| Surface area | 1.4 km2 (0.54 sq mi) |
| Surface elevation | 560 m (1,840 ft) |
Lac de Saint-Agnan is a lake in Nièvre, France. At an elevation of 560 m, its surface area is 1.4 km2.