The Hersey River is a 13.4 mi stream in the Lower Peninsula of the U.S. state of Michigan. It rises in Lincoln Township in northwest Osceola County at the junction of Hersey Creek and the East Branch Hersey Creek at 43.84861°N, -85.43306°W. For approximately the first two miles, the river flows southward just east of U.S. Route 131. US 131 crosses the river near the northern boundary of Richmond Township. The river continues southward into Lake No Sho Mo, formed by a dam just south of Nartron Field airport. The river continues southward under U.S. Route 10 into Reed City and turns to the east, continuing southeastward into the village of Hersey, where it empties into the Muskegon River at Blodgett's Landing Campground.

Named tributaries

From the mouth:

Drainage basin

The drainage basin includes all or portions of the following townships and municipalities: