The Kawkawlin River is a 17.5-mile-long (28.2 km)[1] stream in the U.S. state of Michigan that flows into Saginaw Bay of Lake Huron at 43°39′30″N 83°53′00″W / 43.65833°N 83.88333°W / 43.65833; -83.88333,[2] approximately 1 mile (1.6 km) west of the mouth of the Saginaw River.

The confluence of the north and south branches northwest of Bay City at 43°38′43″N 83°57′11″W / 43.64528°N 83.95306°W / 43.64528; -83.95306, just a little more than one mile from the mouth of the river.

[3] The North Branch rises from the confluence of Hoffman Drain and Watson Drain at 43°49′48″N 84°10′21″W / 43.83000°N 84.17250°W / 43.83000; -84.17250, at the southeast corner of Gladwin County.

[3] Upstream from the confluence with the North Branch, the Kawkawlin (or the South Branch), rises from the confluence of Dietline and Betzoid drains at 43°39′32″N 84°04′01″W / 43.65889°N 84.06694°W / 43.65889; -84.06694.

[2] The Kawkawlin River system drains all or portions of the following townships: