In 1963 it became the first interstate high school in the country as part of a bill that was the last signed into action by John F.

Enrollment is approximately 786 students, the majority of whom come from the towns of Hanover (New Hampshire) and Norwich, Vermont.

11% of the student body attends on a tuition basis from towns such as Cornish and Lyme, New Hampshire, and Strafford and Hartland, Vermont.

[5] The academic program is divided into the traditional five departments: English, Math, Science, Social Studies, and Foreign Language.

For example, seniors often elect to design and complete an independent study project that academically explores a personal interest.

The boys' hockey and lacrosse teams are both the smallest schools in Division I, yet Hanover almost always makes it to the state finals in at least one of the sports, if not both.

The school has a number of music ensembles (both official and student-run), publications, community service organizations, a drama group "Footlighters" that puts on two shows and a musical each year, a student-organized drama group "SOS; Students On Stage" that puts on one show a year, and a quiz bowl team that has in recent years won both New Hampshire and Vermont state championships.

The proceeding election to determine the new mascot led to a five way runoff, with one of the most popular choices, the Jalapeños, being disqualified for fears of cultural appropriation.

The current mascot is a bear, designed by an alumni, with the teeth as outlines of the VT and NH state to show the interstate nature of the school.

Sports offered include baseball, basketball, cross country running, cross-country skiing, crew, field hockey, football, golf, ice hockey, lacrosse, rugby, ski jumping, soccer, softball, swimming, tennis, track, ultimate, and volleyball.