Plymouth State University is accredited by the New England Association of Schools and Colleges, the nationally recognized, non-governmental organization whose mission is to evaluate the quality and integrity of educational programs. Institutions earning this accreditation are judged to be providing educational experiences that can be transferred to any other accredited college or university   in the nation.

In addition to being accredited by the New England Association of Schools and Colleges, Plymouth State University is approved by the New Hampshire Department of Education—Division of Higher Education—Higher Education Commission. The professional education programs at Plymouth State University are accredited by the National Council for the Accreditation of Teacher Education (NCATE), 2010 Massachusetts Avenue, NW, Suite 500, Washington DC 20036; phone (202) 466-7496. This accreditation covers initial teacher preparation programs and advanced educator preparation programs. NCATE is recognized by the US Department of Education and the Council for Higher Education Accreditation to accredit programs for the preparation of teachers and other school personnel.

Program-specific accreditations include the following: athletic training program by the Commission on Accreditation of Athletic Training Education; nursing program by the Commission on Collegiate Nursing Education; social work program by the Council on Social Work Education; the bachelor’s degree programs in accounting, business administration, finance, management, and marketing, and the Master of Business Administration by the Association of Collegiate Business Schools and Programs; and the mental health and school counseling programs by the Council for Accreditation of Counseling and Related Educational Programs