Lyndon Institute is fully accredited by the New England Association of Schools and Colleges (NEASC) and has been approved by the Vermont State Board of Education.

Lyndon Institute admits students of any sex, race, color, religion, national or ethnic origin to all the rights, privileges, programs, and activities generally accorded or made available to students at the school.  It does not discriminate on the basis of sex, race, color, religion, handicap, sexual orientation, national or ethnic origin in the administration of its education policies, admission policies, scholarship programs, and athletic and other school-administered programs.

Lyndon Institute is also a member of the Vermont Independent Schools Association and the Independent Schools Association of Northern New England.

Lyndon Institute is approved as an independent school by Vermont law.