The Sewell Mill Library & Cultural Center serves about 61,500 residents in the City of Marietta and is a Cobb County Public Library member.
The library system maintains over 928,000 volumes and circulates approximately 2.8 million items annually. The branch was established in December 2017 to replace the old East Marietta Library. It has a Preservation Place for digitization services, Black Box Theartre, Outdoor Amphitheater, Meeting & Study Rooms, Public computers, and WiFi and offers printing, copying, and scanning services and events for all ages.