Cottonwood Lake (Sully County, South Dakota)
| Cottonwood Lake | |
|---|---|
| Location | Sully County, South Dakota |
| Coordinates | 44°50′08″N 99°54′21″W / 44.8355740°N 99.9058888°W |
| Type | lake |
| Surface elevation | 1,801 feet (549 m) |
Cottonwood Lake is a lake in South Dakota, in the United States.
The lake was so named on account of the cottonwood trees which grew there.