The American Association of Law Libraries "is a nonprofit educational organization with over 5,000 members nationwide. AALL's mission is to promote and enhance the value of law libraries to the legal and public communities, to foster the profession of law librarianship, and to provide leadership in the field of legal information and information policy."

A law library is a special library used by law students, lawyers, judges and their law clerks, historians, and other scholars of legal history in order to research the law. Law libraries are also used by people who draft or advocate for new laws, e.g. legislators and others who work in state government, local government, and legislative counsel offices or the U.S. Office of Law Revision Counsel and lobbying professionals. Self-represented, or pro se, litigants also use law libraries.