| Lake Marsh | |
| Location: | Hamlin County, South Dakota |
| Coordinates: | 44.6442°N -97.2425°W |
| Type: | lake |
| Pushpin Map: | South Dakota |
| Pushpin Map Alt: | Location of lake in South Dakota. |
Lake Marsh is a natural lake in South Dakota, in the United States.
Lake Marsh has all of the qualities of a marsh, hence the name.[1]