The Mustinka River is a tributary of Lake Traverse, 68 mi (109 km) long,[1] in western Minnesota in the United States.

[2][3] Mustinka is a name derived from the Dakota language meaning "rabbit".

[4] The Mustinka River rises about 5 miles (8 km) south-southwest of Fergus Falls in southwestern Otter Tail County and initially flows generally southward into Grant County, passing through Stony Brook Lake and Lightning Lake.

The river turns westwardly in southern Grant County and flows past Norcross into Traverse County, where it turns southwestward past Wheaton.

It flows into the northern end of Lake Traverse from the east, about 7 miles (11 km) southwest of Wheaton.