Gwinn is an unincorporated community in Marquette County in the U.S. state of Michigan. The community is in Forsyth Township at 46°16′52″N 87°26′27″W﻿ / ﻿46.28111°N 87.44083°W﻿ / 46.28111; -87.44083 on M-35 near the forks of the east and middle branches of the Escanaba River.