[1] It is accredited by the New England Association of Secondary Schools and Colleges and by the Vermont Department of Education.

Mount Mansfield Union High School is part of the Mount Mansfield Modified Union School District, and serves students from Jericho, Underhill, Richmond, Huntington, and Bolton.

[3] U.S. News ranked MMU as the best high school in Vermont, both public and private.

[4] In April 2017 it was ranked as the third best high school in Vermont and at number 893 in the nation.

[5] MMU has also been cited by BusinessWeek as being the "best high school in Vermont" and "among the best in New England", based on academic performance and standardized test scores.