Crystal Lake is a lake located in Lida Township in Otter Tail County, Minnesota, USA.

Crystal Lake is an almost circular lake, covering an area of 1,317 acres (5 km2)[2] and reaching a maximum depth of 55 feet (17 m).

To the west is Lake Lizzie, which is connected to Crystal Lake by a navigable culvert under County Road 31.

Smaller Lake Franklin is located to the northwest.

This article about a location in Otter Tail County, Minnesota is a stub.