Delaware Libraries
- College & Research Libraries in Delaware Directory
- Delaware Division of Libraries
- Public Libraries By Name | By Place
- School Libraries
Delaware Public Library Catalogs
- Delaware Library Catalog — Kent and Sussex Counties (and Del Tech, Wesley College, and Delaware Public Archives)
- TipCat — New Castle County (except the Wilmington Public Library)
- Wilmington Public Library
Other Libraries
- Federal Depository Library Program (FDLP) | Catalog of Government Publications (CGP)
- Internet Public Library (IPL)
- Library of Congress | Library catalogs
- New York Public Library
- Smithsonian Institution Libraries
- University of Maryland at College Park
- University of Pennsylvania
Local Associations
- ACRL-DVC (Delaware Valley Chapter of the Association of College and Research Libraries)
- College & Research Libraries in Delaware Directory
- Maryland Library Association
- MAC: Mid-Atlantic Chapter of MLA (Medical Libraries Association)
- New Jersey Library Association
- PALINET
- Pennsylvania Library Association
- Tri-State College Library Cooperative
National Associations
- American Library Association
- Association for Library Service to Children
- American Association of Law Libraries
- American Association of School Librarians
- Association of College & Research Libraries
- Association of Research Libraries
- ASCLA (Association of Specialized and Cooperative Library Agencies)
- Center for Research Libraries (CRL)
- CIRLA (Chesapeake Information and Research Library Alliance)
- Coalition for Networked Information (CNI)
- EDUCAUSE
- Federal Depository Library Program (FDLP) | GPO Access
- FOLUSA (Friends of Libraries U.S.A.)
- Institute of Museum and Library Services (IMLS)
- Medical Libraries Association
- Office for Intellectual Freedom
- Public Library Association
- Reference and User Services Association (RUSA)
- Society of American Archivists
- Special Libraries Association
- Young Adult Library Services Association
State Associations