Download coordinates as: The Fawn River is a 55.4-mile-long (89.2 km)[1] river in southwest Michigan and northeast Indiana in the United States.

It flows into the St. Joseph River in the city of Constantine, Michigan.

The headwaters rise in a series of lakes and marshes in northern Steuben County, Indiana near Pokagon State Park, where it is known as "Crooked Creek" and "Little Fawn River".

Passing to the south of Sturgis, Michigan, the river meanders across the state line a few more times before flowing north into Constantine.

The drainage basin for the Fawn River and tributaries includes all or portions of the following: (from the mouth) Becomes the Crooked Creek[27]