Gwinnett County Public Library - Duluth 3480 Duluth Park Ln NW, Duluth, GA30096 Duluth Library users have access to the Gwinnett County Public Library collection of more than 1.1 million books and…More materials and 250 online databases. One of 15 libraries in the system, the Duluth Branch is among the busiest. A Library Help Line is available, and students can get help with homework through tutor.com. Library cards are free to Gwinnett County residents. User accounts can be managed online.