Oldest Founding Date

Among "Schools with 200-400 Students", view the boarding schools with the oldest founding date (2025).

The "founding dates" below are the dates that schools have traditionally.

Note that the definition of "founding date" may differ slightly from school to school (e.g., whether it selects the year the school first received its charter or the year it first admitted students - regardless, the differences between the two are often small).

Washington Academy Photo - Washington Academy, established in 1792, is one of the oldest day & boarding co-ed high schools in the USA. It is located on the Downeast Maine coast, and boast 425 total students from 25 different countries. The Alumni Building is one of nine buildings on its 75+ acre campus.

Cheshire Academy Photo - Our 104 acre (0.42 sq km) campus is in the center of the quiet, beautiful Town of Cheshire, CT. Though just a two hour drive to both Boston and New York, Cheshire is a quiet small town where students are in walking distance of a few area shops and cafes.

Kimball Union Academy Photo - One of the many opportunities for community service is the unique opportunity to train for the Fire Brigade and become be part of the Meriden Fire and Rescue Team.

Brewster Academy Photo - Freshwater Ecology students access the largest freshwater laboratory in the state (Lake Winnipesaukee), without leaving campus.

New Hampton School Photo - Athletics that prepare student-athletes for college.

Kents Hill School Photo - Athletes enjoy the on-campus O'Connor Alpine Training Center for alpine racers and riders. Everyone enjoys it on Saturday nights!

Bishop's College School Photo - Our mission is simple: to create a caring community of learning and development where cultures connect and individuals matter. Our commitment to excellence in academics, wellness, athletics, creativity, and service contribute to a lifetime of engagement and global competence

Gould Academy Photo - Gould Academy offers the only Ski Patrol Program recognized by the National Ski Patrol. Once our students earn their 'jackets,' they are certified to work for the National Ski Patrol at any mountain in the U.S.

The Williston Northampton School Photo - Williston promises an academic culture that respects your ability to think for yourself and gives you the right balance of structure and freedom to make the most of it. You'll be immersed in a challenging curriculum that cultivates active, lifelong learning. And with an average class size of 13 students, your teachers are truly going to know you.

Pickering College Photo - Independent Co-educational Day and Boarding School

Saint James School Photo - Saint James' picturesque 800-acre campus is conveniently located only 70 miles from the Baltimore-Washington metropolitan area.

Saint Mary's School Photo - At Saint Mary's School, girls take center stage. We know girls and we know the all-girl learning environment at Saint Mary's School inspires girls to step outside their comfort zone, engage their minds, amplify their voices, and discover who they are and who they want to become!

Tilton School Photo - Beyond the academic requirement in art, all Tilton students have opportunities to gain significant experience in creative and cultural arts.

Proctor Academy Photo - A community built on authentic relationships.

The Frederick Gunn School Photo - The Frederick Gunn School, founded in 1850, is a co-ed boarding and day school for 315 students in grades 9-12 as well as a post-graduate year located in Washington, Connecticut.

Year Founded Range: 1792 2022 Avg. Year Founded: 1904

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