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 on M-35 near the forks of the east and middle branches of the Escanaba River. Gwinn is a census-designated place (CDP) for statistical purposes, and the CDP includes the nearby communities of Austin to the west and New Swanzy to the east. The population of the CDP was 1,965 at the 2000 census. The Gwinn ZIP code is 49841 and serves a much larger area, including most of Forsyth Township, as well as portions of Turin Township to the east, Wells and Ewing townships to the south, Tilden Township to the west, Richmond, Sands, West Branch, and Chocolay townships to the north.