Duluth is a city in Gwinnett County, Georgia, United States. Located north of Interstate 85, it is approximately 22 miles northeast of Atlanta. As of the 2020 census, Duluth had a population of 31,873, and the United States Census Bureau estimated the population to be 31,864 as of 2021.This Atlanta suburb is home to Gwinnett Place Mall, the Gwinnett Civic and Cultural Center, Gas South Arena, Hudgens Center for the Arts, and the Red Clay Theater.