| Cottonwood Lake | |
| Location: | Marshall County, South Dakota |
| Type: | lake |
| Elevation: | 1827feet |
| Pushpin Map: | South Dakota#USA |
| Pushpin Map Alt: | Location of Cottonwood Lake in South Dakota, USA. |
Cottonwood Lake is a lake in Marshall County, South Dakota, in the United States.
The lake was so named on account of the cottonwood trees found at the lake.[1]