District of Columbia Libraries
| Government-Federal | Public | Academic | Special | Library Associations |
Government-Federal 
- Institute of Museum and Library Services
- Library of Congress
- National Archives and Records Administration
- National Oceanic and Atmospheric Administration
- Smithsonian Institution
- U.S. Department of the Interior
- U.S. Environmental Protection Agency Library Network
- U.S. National Commission on Libraries and Information Science
- United States Naval Observatory Library
Public
Academic
- American University
- Catholic University of America
- Catholic University of America Law Library
- Gallaudet University
- George Washington University
- Georgetown University
- Howard University
- National University
- Washington Research Library Consortium