The Circulation Unit is responsible for circulating a variety of materials including those on reserve and those available on Levels 1, 2, 4, and 5 of Dimond Library and manages the library's stacks and remote storage building. Circulation also handles the issue and renewal of library borrowing cards.

Circulation includes the Dimond Library circulation desk, reserves, periodicals, microforms, multimedia center, stacks, storage, and student hiring and management.