Master’s in Library Science: Requirements, Accreditation & Careers
Library science moved past "quiet shelving and reference desks" a long time ago. Today's MLS or MLIS graduates run school libraries, manage digital archives, build the systems that let researchers find what they need, and increasingly work in museums, universities, and tech companies that need someone who understands how information gets organized. If you're still working out where this fits among the broader options for choosing an education degree, know that a library science master's is one of the more flexible paths: it accepts applicants from any undergraduate major and offers strong online options. If you already hold a bachelor's degree and are weighing whether a master's is worth it, the honest answer is: it depends on where you want to end up, and accreditation matters more than almost anything else on this list.
Who This Degree Is For
Most programs expect a completed bachelor's degree in any field: library science doesn't require a specific undergraduate major the way, say, a teaching credential does. If you haven't settled on the master's track specifically, the overview of the library science degree covers every level, from associate through doctoral. Admissions committees typically look at GRE scores (though a growing number of programs have dropped this requirement), letters of recommendation, and sometimes an interview. If you're coming from a classroom teaching background and considering a move into school librarianship, this degree is a common path, but in many states, prior teacher certification or licensure is part of the school-librarian credential pathway itself, not just an admissions advantage. Separate educator-licensure, experience, coursework, and assessment requirements may apply depending on the state.
Why ALA Accreditation Is the Detail That Matters Most
Accreditation from the American Library Association (ALA) is an important consideration when choosing a program, particularly if you're aiming for a professional librarian position. ALA accreditation is widely recognized as the standard preparation for librarian roles, but it isn't a single universal gatekeeper: some states or employers may impose their own degree, accreditation, or certification requirements on top of it, and school-librarian pathways in particular often run through a state's educator-licensing or credentialing agency rather than through library-specific accreditation alone. Verify the rules for the state and role where you plan to work before enrolling: the ALA's accredited program directory is a good starting point, not the final word on any one state's requirements.
Online vs. In-Person: What Actually Changes
Online MLS/MLIS programs are common now, and the coursework itself doesn't differ much from an in-person track at the same accredited school. What changes is logistics: no relocation, more flexibility for people working full time, and access to programs outside your immediate area. The trade-off is that you'll need to be deliberate about building the professional network that used to happen naturally in a physical cohort. Most programs address this with structured group projects, practicum placements, and alumni mentorship programs, but it's worth asking a program directly how they handle it before you commit.
What the Coursework Covers
Programs vary, but most MLS/MLIS degrees build around a common core: information organization and cataloging, reference and research services, database and systems design, and the ethics of information access. You'll also typically take at least one course specifically on evaluating and curating collections, and most programs require a capstone (a thesis, portfolio, or applied project) before graduation.
Beyond the core, expect electives in areas like archives and preservation, youth and school library services, digital librarianship, and information policy. If you already know you want to work in a K-12 school library rather than a public or academic one, look for a school-librarianship track specifically aligned with the credential requirements of the state where you intend to work. A program built for the state it's located in won't necessarily satisfy every other state's rules.
Career Paths After Graduation
An accredited MLS or MLIS opens more doors than "librarian" alone suggests. Common paths include:
- School librarian/library media specialist
- Public or academic reference librarian
- Archivist (museum, corporate, or government)
- Digital services or systems librarian
- Records manager
- Information or research analyst
The Bureau of Labor Statistics tracks librarian and library media specialist roles under its Education, Training, and Library occupations group. Entry requirements differ by path: an MLS/MLIS prepares you for most of these roles, but archivist, records manager, and school librarian positions each carry their own additional employer or state requirements rather than one shared credential.
Frequently Asked Questions
Do I need a teaching background to get a master's in library science?
Not to be admitted: most MLS/MLIS programs accept applicants from any undergraduate major. But an MLS/MLIS alone doesn't automatically qualify you for a K-12 school librarian position. Many states require a bachelor's or master's in a related field plus teaching certification through the state's educator-licensing or credentialing agency, and the exact combination varies by state, so check the specific pathway where you plan to work.
Is an online master's in library science treated the same as an in-person one?
Employers generally care about accreditation, not delivery format. An online MLS or MLIS from an ALA-accredited program carries the same weight as an in-person one from the same school. What differs is the networking and hands-on practicum experience, which online programs handle in a variety of ways worth asking about directly.
What happens if I earn the degree from a non-accredited program?
You may still finish the coursework, but some states or employers impose specific degree, accreditation, or certification requirements for librarian roles. The Bureau of Labor Statistics notes that some states require certification for public librarians. An unaccredited degree can close doors that an accredited one keeps open, so verify the rules for the state and role where you plan to work before you enroll, not after you graduate.
Can this degree lead to work outside of libraries?
Yes. Graduates go on to work as archivists, records managers, digital collections specialists, and research analysts in museums, corporations, and government agencies, anywhere that needs someone who can organize and retrieve large amounts of information.
Do I need to take the GRE to apply?
It depends on the program. Many library science graduate programs have dropped the GRE requirement in recent years, but it's still required at some schools. Check the specific admissions page for the program you're applying to rather than assuming either way.
- Accreditation matters, but isn't the whole picture - ALA accreditation is widely recognized for professional librarian preparation, while public-library certification and school-librarian credential requirements vary by state.
- No specific undergraduate major is required for admission - programs accept applicants from any bachelor's degree field, though school-librarian roles often require separate teaching certification through the state's educator-licensing agency.
- Online and in-person coursework are equivalent - the real difference is networking and practicum logistics, not academic rigor.
- The degree opens more than "librarian" - archivist, records manager, and digital services roles are all common paths, though each carries its own additional employer or state requirements.
Accreditation isn't the only thing that varies between programs: cost, format, and whether a school offers a dedicated school-library track all differ too. The sponsored programs listed here include several ALA-accredited options with online formats built for people already working full time.