Grosse Ile (/ˌɡroʊs ˈiːl/ grows-EEL) is an American island in Wayne County in the U.S. state of Michigan.

Originally occupied by Native Americans, the island was given to the early French explorers by the Potawatomi in 1776.

Brothers William and Alexander Macomb, merchants and fur traders from Albany, New York and Detroit, took the island from the Potawatomi, becoming the first European-American owners.

The island remained sparsely populated and an independent community, but it did not gain autonomy until the formation of Grosse Ile Township on October 27, 1914.

[3] The island of Grosse Ile is considered an affluent part of the Downriver community just south of the city of Detroit.