Lawrenceville is a city in and the county seat of Gwinnett County, Georgia, in the United States. It is a suburb of Atlanta, and is located approximately 30 miles northeast of downtown. The Census Bureau estimates the 2010 population at 28,546. Lawrenceville has six ZIP codes (30042-30046, 30049); it is part of the 678/770/404 telephone area code, which is used throughout metropolitan Atlanta.