Mud Hen Lake is an unorganized territory in Saint Louis County, Minnesota, United States.
The unincorporated community of Makinen is located within Mud Hen Lake Unorganized Territory.
At the 2000 United States census there were 320 people, 131 households, and 91 families living in the unorganized territory.
There were 246 housing units at an average density of 7.1 per square mile (2.7/km2).
The racial makeup of the unorganized territory was 98.12% White, 0.31% Native American, 0.31% Asian, and 1.25% from two or more races.