| Lake Badus | |
| Location: | Lake County, South Dakota |
| Coordinates: | 44.147°N -97.1497°W |
| Type: | lake |
| Pushpin Map: | South Dakota |
| Pushpin Map Alt: | Location of a lake in South Dakota. |
Lake Badus is a lake in South Dakota, in the United States.
Lake Badus takes its name from a mountain of the same name in Switzerland, the native land of a share of the first settlers.[1]