Located in Gwinnett County, Duluth was incorporated in 1876. The community was originally named Howell’s Crossroad. The current Population, at time of post, is 26,600. Total Area in the City of Duluth is 8.9 sq mi. Unincorporated portions of Forsyth County also have Duluth as a mailing address, though this area is outside city limits. Much of the adjacent city of Johns Creek (incorporated in 2006) uses one of the Duluth Zip codes.