| Grass Lake | |
| Location: | Codington County, South Dakota |
| Type: | lake |
| Elevation: | 1742feet |
| Pushpin Map: | South Dakota#USA |
| Pushpin Map Alt: | Location of Grass Lake in South Dakota, USA. |
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.[1]