Grass Lake (Codington County, South Dakota)
| Grass Lake | |
|---|---|
| Location | Codington County, South Dakota | 
| Coordinates | 45°04′19″N 97°23′01″W / 45.0719622°N 97.3836820°W | 
| Type | lake | 
| Surface elevation | 1,742 feet (531 m) | 
Grass Lake is a natural lake in South Dakota, in the United States and Humboldt is the closet town to the lake.
Grass grew in abundance at Grass Lake, hence the name.