Regional federal depository and depository of state documents in Ohio. Houses information on congressional hearings and reports, United States and State of Ohio legislative history, statistics, facts about the Ohio, geological information, military rosters, state institutional and agency reports and census data.

Provides activity and law passage status and other service information, also provides contact information for Ohio State Representatives and Senators

Serves as the research arm of the U.S. Congress and operates as a research library that is open to the general public. Offers rare, international, and special collections. Materials are only for use at the library and may not be borrowed. Offers guided and self-guided tours, programs for professionals, exhibitions, and special events.