Norcross is a city in Gwinnett County, Georgia, about 15 miles northeast of Atlanta city limits. According to the 2010 census, the population was …Norcross is a city in Gwinnett County, Georgia, about 15 miles northeast of Atlanta city limits. According to the 2010 census, the population was 9,116, while in 2020, the population increased to 17,209. Norcross is part of the Atlanta metropolitan area, located near the Spaghetti Junction interchange of Interstate 85 and Interstate 285.