| Twentyone Lake | |
| Location: | Otter Tail County, Minnesota |
| Coordinates: | 46.4969°N -95.9808°W |
| Type: | lake |
| Pushpin Map: | Minnesota |
| Pushpin Map Alt: | Location of the lake in Minnesota. |
Twentyone Lake is a lake in Otter Tail County, in the U.S. state of Minnesota.
Twentyone Lake was so named from its location in section 21 of the county.[1]