Some librarians are members of the American Federation of State, County, and Municipal Employees and other unions. The American Library Association is the leading organization for librarians and library paraprofessionals in the United States. It is made up of eight membership divisions, which includes the American Association of School Librarians; Association for Library Service to Children; Association of College & Research Libraries; Core: Leadership, Infrastructure, Futures; Public Library Association; Reference & User Services Association; United for Libraries; and the Young Adult Library Services Association. There are many other organizations for library professionals including the American Association of Law Libraries, Association for Information Science and Technology, Association of Academic Health Sciences Libraries, Association of Research Libraries, and the Special Libraries Association.
The Canadian Library Association represents the professional interests of librarians and support workers who are employed in Canada.
- Acquisitions Librarians
- Active and Contemplative Religious Sisters and Brothers
- Archivists
- Book Conservators
- Children's Librarians
- Corporate Librarians
- Database Specialists
- Directors of Corporate Sponsorship
- Directors of Fund-Raising
- Directors of Volunteers
- Environmental Education Program Directors
- Environmental Lobbyists
- Exhibit Designers
- Film and Video Librarians
- Fund-Raisers
- Grant Coordinators and Writers
- Historic Preservationists
- Information Brokers
- Land Acquisition Professionals
- Land Trust or Preserve Managers
- Law Librarians
- Library and Information Science Instructors
- Library Assistants
- Library Directors
- Library Media Specialists
- Library Technicians
- Lobbyists
- Medical Librarians
- Museum Attendants
- Museum Directors and Curators
- Museum Technicians
- Music Librarians
- National Park Service Employees
- Nonprofit Social Service Directors
- Park Rangers
- Proposal Managers
- Public Interest Lawyers
- Public Opinion Researchers
- Public Relations Specialists
- Rabbis
- Roman Catholic Priests
- Social Workers
- Zoo and Aquarium Curators and Directors