Gwinn is an unincorporated community in Marquette County in the U.S. state of Michigan. It is a census-designated place for statistical purposes and has no legal status as an incorporated municipality. The population of the CDP was 1,784 at the 2020 census. The community is located within Forsyth Township. The CDP includes the nearby communities of Austin to the west and New Swanzy to the east. It is located along M-35 near the forks of the east and middle branches of the Escanaba River.