Duluth High School is a public secondary school in Duluth, a suburb of Atlanta, Georgia, USA. It provides education for grades 9-12 and is operated by Gwinnett County Public Schools. The school was built in 1958 to serve Duluth, Berkeley Lake, and unincorporated portions of western Gwinnett County. As of 2011 it had approximately 2360 students on roll.DHS holds a Blue Ribbon School award. In its 2012 Georgia rankings, U.S.