| Gilman Lake | |
| Location: | Lake County, South Dakota |
| Coordinates: | 44.1°N -97.3461°W |
| Type: | lake |
| Pushpin Map: | South Dakota |
| Pushpin Map Alt: | Location of the lake in South Dakota. |
Gilman Lake is a natural lake in South Dakota, in the United States.
Gilman Lake has the name of Gilman W. Smith, a railroad engineer.[1]