Sturgeon River is a 63.6-mile-long (102.4 km)[2] river in the U.S. state of Michigan, flowing mostly southward through Alger County and Delta County counties on the Upper Peninsula.

The Sturgeon River rises as the outflow of Sixteenmile Lake in Alger County at 46°17′35″N 86°46′00″W / 46.29306°N 86.76667°W / 46.29306; -86.76667 and flows primarily southward into Big Bay de Noc of Lake Michigan at 45°50′17″N 86°40′01″W / 45.83806°N 86.66694°W / 45.83806; -86.66694.

[1] The West Branch Sturgeon River rises at 46°09′56″N 86°43′46″W / 46.16556°N 86.72944°W / 46.16556; -86.72944 and flows southeast 12.5 miles (20.1 km)[2] into the main stream at 46°08′43″N 86°41′14″W / 46.14528°N 86.68722°W / 46.14528; -86.68722.

The name was changed to St. Jacques on June 22, 1904.

It closed on November 30, 1913, re-opened April 11, 1919, and was discontinued on July 31, 1955.