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Asheville School is a coeducational boarding and day school in Asheville, North Carolina, set in the Blue Ridge Mountains. Founded in 1900, it emphasizes a classical liberal arts curriculum, a strong outdoor and mountaineering program, and a close-knit residential community.

Avon Old Farms School is an all-boys boarding and day school in Avon, Connecticut, built in a distinctive English Cotswolds architectural style. Known for strong athletics, a close brotherhood community, and consistent college placement.

Belmont Hill School is an all-boys day school for grades 7-12 in Belmont, Massachusetts. Known for its rigorous academic program, strong athletics, and traditional structure, Belmont Hill emphasizes character, scholarship, and brotherhood in a 32-acre suburban campus.

Berkshire School is a coeducational boarding school nestled against Mount Everett in the southern Berkshires of Massachusetts. The Advanced Math/Science Research program (AMSR) and a strong outdoor program leverage the mountain campus.

Berwick Academy is a co-ed day school in South Berwick, Maine, founded in 1791 and serving PK-12. One of Maine's oldest independent schools, known for strong academics, outdoor education, and a tight-knit community near the New Hampshire border.

Blair Academy is a coeducational boarding and day school in Blairstown, New Jersey, set on a 463-acre hilltop campus in the Kittatinny foothills. Founded in 1848, Blair combines a Harkness-style discussion curriculum with a highly residential program and nationally competitive athletics, especially wrestling.

Blue Ridge School is an all-boys boarding school nestled in the Blue Ridge Mountains of central Virginia. Known for a highly structured and supportive environment ideal for students who thrive with clear expectations and outdoor challenge, its strong ski, mountain biking, and outdoor programs complement a college prep curriculum.

Co-ed boarding school on the shores of Lake Winnipesaukee in New Hampshire's Lakes Region. Known for strong athletics including a nationally recognized basketball program and a 200-meter indoor track. Blends college prep academics with an entrepreneurial, student-centered culture.

Brooks School is a coeducational boarding and day school on the shores of Lake Cochichewick in North Andover, Massachusetts. With a small student body and a lakefront campus, Brooks emphasizes faculty-student relationships, athletic competition, and a Center for the Arts.

Buckingham Browne & Nichols (BB&N) is a coeducational PK-12 day school in Cambridge, Massachusetts. With three campuses and proximity to Harvard and MIT, BB&N offers a progressive curriculum and a strong arts and athletics program in the heart of the Boston area.

Burr and Burton Academy is a co-ed boarding and day school in Manchester, Vermont, serving as the independent school for the local community while also welcoming boarding students. Known for strong arts, outdoor education, and access to world-class skiing in the Green Mountains.

Cape Fear Academy is a co-ed day school in Wilmington, North Carolina, offering a strong college preparatory curriculum alongside arts, athletics, and community service. One of the leading independent schools in the Cape Fear region.

Cate School is a coeducational boarding and day school perched on a 150-acre mesa above the Pacific coast in Carpinteria, California. Founded in 1910, Cate is known for its small size, close student-faculty relationships, strong outdoor program, and a service requirement built into daily campus life.

Catlin Gabel School is a coeducational preschool-through-12 progressive independent day school on a wooded 67-acre campus in Portland, Oregon. Formed by the 1957 merger of the Catlin Hillside School and the Gabel Country Day School, Catlin Gabel emphasizes experiential learning, project work, and a robust arts and outdoor program.

Chatham Hall is an all-girls Episcopal boarding and day school in southern Virginia known for its nationally recognized equestrian program and small average class size of seven students. More than half of the student body receives financial aid.

Cheshire Academy is a co-ed boarding and day school in central Connecticut, founded in 1794 and known for its diverse international student body, strong ESL program, and supportive academic environment. One of the most internationally diverse prep schools in New England.

Choate Rosemary Hall is a coeducational boarding and day school in Wallingford, Connecticut. Known for its signature programs in international relations, environmental immersion, and arts concentration, Choate offers a balance of traditional academic depth with strong experiential learning.

Christ School is an all-boys Episcopal boarding and day school in Arden, North Carolina, just south of Asheville. Founded in 1900, it emphasizes a small residential community, an outdoor program in the Blue Ridge foothills, and a strong athletic tradition for grades 8-12.

Cincinnati Country Day School is a coeducational PK-12 independent day school on a 62-acre campus in the Indian Hill area of Cincinnati. Founded in 1926, CCD is known for its 1:1 laptop program (one of the first in the country), strong college placement, and a broad slate of arts and athletic offerings.

Collegiate School is an all-boys day school on Manhattan's Upper West Side, founded in 1628 and the oldest school in continuous operation in the United States. Known for exceptional academic rigor, strong college placement, and a distinguished history.

Colorado Rocky Mountain School is a coeducational boarding and day school on a 300-acre ranch campus in the Roaring Fork Valley near Aspen. Founded in 1953, CRMS is built around an experiential model that pairs college-prep academics with wilderness expeditions, a working farm, and hands-on shop and craft programs.

Concord Academy is a small coeducational school in historic Concord, Massachusetts, with a strong arts identity and a progressive academic culture. About a quarter of students board; the rest are day students from the Boston area.

Cranbrook Schools is a coeducational PK-12 school on a 319-acre National Historic Landmark campus in suburban Detroit, with boarding available in the upper school. Part of the Cranbrook Educational Community founded by George and Ellen Booth, the school is renowned for its Saarinen-designed architecture, strong arts and science programs, and integration with the Cranbrook Institute of Science and Art Museum.

Culver Academies comprises the Culver Military Academy for boys and the Culver Girls Academy on a shared 1,800-acre lakeside campus in northern Indiana. Founded in 1894, Culver blends a traditional college-preparatory curriculum with a leadership and character-education program built around a distinctive residential system and equestrian tradition.

Cushing Academy is a coeducational boarding and day school in north-central Massachusetts. Cushing has a notable international student population, dedicated programs in visual & performing arts and competitive athletics, and a flexible curriculum that supports a broad range of learners.

Darlington School is a coeducational boarding and day school in Rome, Georgia, serving pre-kindergarten through grade 12 with boarding beginning in upper school. Founded in 1905, Darlington sits on a 500-acre lakeside campus and offers a Global Programs curriculum and a large international student body.

Deerfield Academy is a coeducational boarding school in the historic village of Deerfield, Massachusetts. Sit-down family-style meals, a tight residential community, and a strong sense of tradition define the Deerfield experience, alongside rigorous academics and Division I-caliber athletics.

Very small co-ed boarding and day school on a hilltop in southern New Hampshire. Known for close student-faculty relationships, a strong outdoor program, and arts integration. One of the smaller boarding environments in New England with a tuition that includes nearly all fees.

Episcopal Academy is a co-ed day school founded in 1785 in suburban Philadelphia, one of the oldest schools in the United States. Known for rigorous academics, exceptional college placement, and a beautiful 123-acre campus in Newtown Square.

Episcopal High School is a 100% boarding co-ed school just outside Washington D.C. in Alexandria, Virginia. One of the oldest boarding schools in the South founded in 1839, known for a strong honor code, exceptional college placement, and a close-knit residential community.

Fork Union Military Academy is an all-boys military boarding school in central Virginia known for its one-subject-at-a-time academic system and exceptional postgraduate year program. A significant pipeline for NCAA Division I athletes.

Fountain Valley School of Colorado is a coeducational boarding and day school on a 1,100-acre prairie campus outside Colorado Springs, with views of Pikes Peak. Founded in 1930, FVS combines a rigorous college-prep curriculum with a strong outdoor education program in the Rockies.

Foxcroft School is an all-girls boarding and day school in Middleburg, Virginia, in the heart of horse country. Founded in 1914, Foxcroft is one of the country's oldest all-girls boarding schools and combines a college-prep curriculum with a well-known riding program on a 500-acre campus.

George School is a coeducational Quaker boarding and day school in Newtown, Pennsylvania. Founded in 1893, it is one of the few U.S. secondary schools offering the full International Baccalaureate Diploma alongside a traditional college-prep curriculum, all within a Friends (Quaker) values framework of simplicity, service, and consensus decision-making.

Georgetown Preparatory School is an all-boys Jesuit boarding and day school in North Bethesda, Maryland, just outside Washington, D.C. Founded in 1789, it is the oldest Jesuit secondary school in the United States and the only Jesuit boarding school in the country, combining Ignatian formation with a college-preparatory academic program.

Gilman School is an all-boys day school in Baltimore, Maryland, known for its rigorous academics, strong athletics, and deep community ties in the Baltimore-Washington corridor. Part of a consortium of prestigious Baltimore independent schools.

Gould Academy is a co-ed boarding and day school on a 456-acre campus in the western Maine mountains, nationally recognized for competitive skiing and Nordic programs with access to 500+ km of groomed terrain. Strong outdoor education culture alongside college prep academics.

Greenhill School is a co-ed day school in Addison, Texas, one of the most prestigious independent schools in the Dallas-Fort Worth metroplex. Known for exceptional academics, strong arts and athletics, and consistent placement at highly selective universities.

Groton School is a small, coeducational Episcopal boarding school in Groton, Massachusetts. With grades 8-12 and just under 400 students, Groton emphasizes character, scholarship, and a deeply residential community. It is one of the few elite prep schools to retain a Form (eighth grade) entry point.

Hackley School is a co-ed day school overlooking the Hudson River in Tarrytown, New York, 30 minutes from Manhattan. Known for strong academics, arts, and a diverse community. One of the most respected day schools in the greater New York metro area.

Hammond School is a co-ed day school in Columbia, South Carolina, known for strong academics, competitive athletics, and a vibrant school community. One of the leading independent schools in the Midlands region of South Carolina.

Hargrave Military Academy is an all-boys military boarding school in southern Virginia known for its diverse international enrollment and strong NCAA athletic pipeline. Offers a structured environment that develops discipline, leadership, and character.

Harvard-Westlake School is a coeducational 7-12 day school with two campuses in Los Angeles, formed by the 1991 merger of the Harvard School for Boys and the Westlake School for Girls. Harvard-Westlake is widely regarded as one of the top independent schools in the country, with deep strengths in STEM, humanities, performing arts, and athletics.

Hawken School is a coeducational PK-12 independent day school with campuses in Gates Mills and Lyndhurst, Ohio, plus an urban extension in University Circle. Hawken is known for its Mastery School model at the upper-school level, where students engage in intensive interdisciplinary problem-solving courses.

Head-Royce School is a coeducational K-12 independent day school on a 22-acre hillside campus in the Oakland hills. Formed by the 1979 merger of the Anna Head School and the Royce School, Head-Royce is known for a rigorous liberal-arts program, a strong social-justice orientation, and a distinctive service-learning requirement.

Hebron Academy is a small co-ed boarding and day school founded in 1804 in rural Oxford County, Maine. Known for its supportive academic environment, strong mental health and wellness programming, and 21 varsity and JV sports.

Small co-ed boarding and day school in Plymouth, NH, known for its student-run Job Program and strong outdoor education traditions. Emphasizes hands-on learning, leadership, and a close faculty-student relationship. Located in the heart of New Hampshire's lakes and mountains.

Horace Mann School is a co-ed day school in Riverdale in the Bronx, New York, known for exceptional academic rigor and consistent placement at the nation's most selective universities. One of the top day schools in the United States.

Idyllwild Arts Academy is a co-ed boarding and day arts school in the San Jacinto Mountains of California offering intensive training in music, dance, creative writing, film, theater, and visual arts alongside college prep academics. Students come from over 25 countries.

Indian Mountain School is a co-ed junior boarding and day school in the Litchfield Hills of Connecticut, serving grades K-9. A feeder school for many New England prep schools, known for its nurturing environment and strong academic foundation.

Interlochen Arts Academy is the nation's first fine-arts boarding high school, set on a 1,200-acre wooded campus in northern Michigan between two lakes. Students major in creative writing, dance, film, music, theatre, or visual arts alongside a full college-preparatory curriculum, and the campus doubles as a professional performance venue.

Kent School is a coeducational Episcopal boarding school in the Litchfield Hills of Connecticut. Known for simplicity of life, directness of purpose, and self-reliance, Kent has a strong engineering program (the Pratt Engineering Program) and notable rowing tradition on the Housatonic River.

Kents Hill School is a co-ed boarding and day school in central Maine offering strong STEM, arts, and outdoor programs. Discounted tuition available for Maine residents. Known for its close community, experiential learning, and competitive athletics.

Founded in 1813, KUA sits 12 miles from Dartmouth College and draws students from over 23 countries. Offers Global, Arts, and STEM scholar programs alongside a strong outdoor and community service culture. A Lakes Region school known for its tight-knit boarding community.

Kingswood Oxford School is a co-ed day school in West Hartford, Connecticut, formed by the merger of two historic schools. Known for strong STEM and arts programs, a diverse community, and consistent college placement in suburban Hartford.

Lake Forest Academy is a coeducational boarding and day school on a 150-acre former Armour estate north of Chicago. Founded in 1857, LFA emphasizes a global perspective with students from more than 30 countries and offers a broad college-preparatory curriculum with strong programs in arts, athletics, and international study.

Lakeside School is a coeducational 5-12 independent day school in north Seattle. Founded in 1919, Lakeside is known for a rigorous liberal-arts curriculum, a distinctive Global Service Learning program, and a long-standing early commitment to computing (its computer club famously included Bill Gates and Paul Allen).

Latin School of Chicago is a coeducational JK-12 independent day school in the Gold Coast neighborhood of Chicago. Founded in 1888, Latin is known for a rigorous college-preparatory program, an urban campus that leverages the city as a classroom, and strong programs in the arts and civic engagement.

Lawrence Academy is a co-ed boarding and day school in Groton, Massachusetts, known for its flexible student-centered curriculum and strong arts program. ISL member with a progressive academic culture and significant financial aid commitment 45 minutes northwest of Boston.

Marlborough School is an all-girls 7-12 day school in the Hancock Park neighborhood of Los Angeles. Founded in 1889, Marlborough is Southern California's oldest independent school for girls and is known for its rigorous college-prep program with signature offerings in entrepreneurship, computer science, and honors research.

McCallie School is an all-boys Christian boarding and day school in Chattanooga, Tennessee, serving grades 6-12 with boarding in the upper school. Founded in 1905, McCallie combines a Christian ethos with rigorous academics, a well-known wrestling program, and a strong outdoor education tradition.

McDonogh School is a co-ed boarding and day school on a 800-acre campus in Owings Mills, Maryland. Known for its exceptional athletic facilities, strong academics, and proximity to Baltimore and Washington D.C.

Mercersburg Academy is a coeducational boarding and day school in the Cumberland Valley of south-central Pennsylvania. Founded in 1893, Mercersburg is known for its strong arts program (including an Emmy-winning student TV studio), a signature Springboard program of experiential capstones, and a 300-acre campus with award-winning green architecture.

Middlesex School is a small coeducational boarding and day school in Concord, Massachusetts. With a 350-acre campus designed by Frederick Law Olmsted's firm and an emphasis on the 'Circle of Concern,' Middlesex pairs an intimate residential community with strong humanities and arts programs.

Millbrook School is a coeducational boarding and day school on an 800-acre campus in Millbrook, New York. Founded in 1931, Millbrook is distinguished by its on-campus zoo and wildlife ecology program, its environmental sustainability initiatives, and a close-knit residential community in the Hudson Valley.

Miller School of Albemarle is a small co-ed boarding and day school near Charlottesville, Virginia, known for its working farm, hands-on learning, and strong arts and photography programs. Offers a close-knit residential community with individualized attention.

Milton Academy is a K-12 coeducational independent school in Milton, Massachusetts, just south of Boston. Its Upper School (9-12) combines boarding and day students, and the school is known for its progressive teaching, strong arts, and proximity to Boston for internships and cultural access.

Miss Porter's School is an all-girls boarding and day school in Farmington, Connecticut. Founded in 1843, Porter's has educated generations of women leaders and offers a curriculum and residential program designed specifically around the experiences and leadership development of girls.

Co-ed boarding and day school 90 minutes from Boston with a strong IB program and 340-acre campus. Values character development alongside academic achievement and offers 17 interscholastic sports. Known for its supportive community and personalized attention.

Noble and Greenough School (Nobles) is a coeducational day school for grades 7-12 in Dedham, Massachusetts, with a small five-day boarding option for upperclassmen. It has a strong academic, arts, and athletics program and emphasizes service and community engagement.

Co-ed boarding and day school with one of the most generous financial aid programs in New England — over 55% of students receive aid. Formed by the merger of two schools founded by Dwight L. Moody. Strong global student body and outdoor education tradition.

Pace Academy is a co-ed day school in Atlanta, Georgia, one of the most prestigious independent schools in the Southeast. Known for exceptional academics, strong college placement, and a vibrant community in Buckhead Atlanta.

Parish Episcopal School is a large co-ed Episcopal day school in Dallas, Texas, known for its strong academics, extensive athletics program, and vibrant community. One of the fastest-growing and most innovative independent schools in North Texas.

Park Tudor School is a coeducational PK-12 day school on a 55-acre wooded campus in Indianapolis. Formed by the 1970 merger of the Park School and Tudor Hall, Park Tudor is known for its rigorous college-preparatory curriculum, strong athletics, and merit-based scholarship program.

Peddie School is a coeducational boarding and day school in Hightstown, New Jersey. Founded in 1864, Peddie benefits from one of the largest per-student endowments among U.S. secondary schools, funding generous financial aid, a strong signature-experience program, and modern academic facilities on a 280-acre lake-side campus.

Phillips Academy, commonly known as Andover, is a highly selective coed boarding school in Andover, Massachusetts. Founded in 1778, it offers an open curriculum with more than 300 courses across 18 academic divisions, a strong arts program, and a robust commitment to financial aid and socioeconomic diversity.

Phillips Exeter Academy is a coeducational boarding and day school in Exeter, New Hampshire, known for pioneering the Harkness method of seminar-style teaching around oval tables. Founded in 1781, Exeter is one of the oldest and most academically rigorous independent secondary schools in the United States, with deep strengths in mathematics, classics, humanities, and the sciences.

Pomfret School is a small coeducational boarding school in northeastern Connecticut, known for its 'Pomfret Grit' culture and the integrative Project: Pomfret curriculum that crosses disciplinary boundaries. The 500-acre hilltop campus supports a tight, residential community.

Porter-Gaud School is a coeducational Episcopal day school in Charleston, South Carolina, serving grades 1-12. Founded in 1867 through the merger of Porter Military Academy and Gaud School, Porter-Gaud emphasizes a college-prep curriculum with Episcopal values on a 78-acre riverside campus.

Portsmouth Abbey School is a coeducational Catholic Benedictine boarding and day school on a 500-acre waterfront campus along Narragansett Bay in Portsmouth, Rhode Island. Founded in 1926 by Benedictine monks, the school pairs a college-preparatory curriculum with a values-based residential community and direct access to sailing on the Bay.

Progressive co-ed boarding and day school known for its Learning Skills program and experiential education. Offers unique off-campus programs including Mountain Classroom, Ocean Classroom, and European Art Classroom. Strong skiing and outdoor athletic tradition.

Rabun Gap-Nacoochee School is a co-ed boarding and day school in the mountains of northeast Georgia known for its work program and one of the most generous financial aid programs in the Southeast. Over half of students receive need-based aid.

Ravenscroft School is a coeducational independent day school in Raleigh, North Carolina, serving pre-kindergarten through grade 12. Founded in 1862, Ravenscroft is known for its Lead From Here framework, a leadership and character program integrated across the K-12 curriculum on a 130-acre campus.

Riverdale Country School is a co-ed day school in Riverdale, Bronx, New York, known for its progressive approach to education, strong arts and athletics, and close community feel despite its urban setting.

Roland Park Country School is an all-girls day school in Baltimore, Maryland, known for its commitment to developing confident, intellectually curious young women. Consistently strong college placement and a close partnership with Gilman School.

Roxbury Latin School is a small all-boys day school in West Roxbury, Massachusetts. Founded in 1645, it is the oldest school in continuous existence in North America. Tuition is intentionally kept well below peer day schools, and the school operates on a 'no boy excluded for financial reasons' policy.

Rye Country Day School is a coeducational day school in Westchester County, New York, known for strong college prep academics and a well-rounded program of arts, athletics, and community service. It draws families from across the New York metro area and consistently sends graduates to selective universities.

Shattuck-St. Mary's School is a coeducational boarding and day school in Faribault, Minnesota, known for its Centers of Excellence model that pairs college preparation with elite training in hockey, soccer, figure skating, golf, biosciences, engineering, and vocal performance. Founded in 1858, SSM draws students from around the world into a small residential community.

Sidwell Friends School is a coeducational Quaker day school in Washington, D.C., serving pre-kindergarten through grade 12. Founded in 1883, Sidwell is known for its Friends-values curriculum, environmental sustainability leadership (its middle school was one of the first LEED Platinum school buildings in the U.S.), and a long history of educating children of U.S. presidents and other public figures.

Solebury School is a small co-ed boarding and day school in New Hope, Pennsylvania, known for its progressive educational philosophy, engineering and STEM programs, and close-knit community. Features strong arts and outdoor education alongside rigorous academics.

South Kent School is a small all-boys boarding school in the Litchfield Hills of Connecticut, known for its extremely low student-teacher ratio and individualized attention. An ideal environment for boys who benefit from structure, mentorship, and a close brotherhood.

St. Andrew's School is a fully residential Episcopal boarding school for grades 9-12 in Middletown, Delaware. Founded in 1929, every student boards, and the school is known for the intensity of its residential community, the Dead Poets Society film shot on its campus, and a robust need-based financial aid program.

St. Andrew's-Sewanee School is an Episcopal co-ed boarding and day school on the Cumberland Plateau in Tennessee, adjacent to the University of the South. Known for its outdoor education program, arts emphasis, and inclusive community.

St. Anne's-Belfield School is a co-ed boarding and day school in Charlottesville, Virginia, adjacent to the University of Virginia. Known for the highest average SAT scores of any Virginia boarding school and strong college placement.

St. George's School is a coeducational boarding and day school overlooking the Atlantic Ocean outside Newport, Rhode Island. An ISL member, it is known for strong academics, sailing, and a beautiful coastal New England campus, with graduates consistently attending highly selective colleges.

St. John's School is a co-ed day school in Houston, Texas, consistently ranked among the top private schools in the South. Known for exceptional academics, competitive athletics, and consistent placement at highly selective universities including multiple Ivy League schools annually.

St. Johnsbury Academy is a large co-ed boarding and day school in northern Vermont serving both local and international students. One of the most affordable boarding options in New England with a full range of AP courses, strong arts programs, and competitive athletics.

St. Mark's School is a co-ed boarding and day school in Southborough, Massachusetts with a long-standing rivalry with Groton School dating to 1886. Known for academic rigor, strong arts, and a close residential community with consistent placement at highly selective colleges.

St. Mark's School of Texas is an all-boys 1-12 independent day school on a 42-acre campus in Dallas. Formed in 1950 from the merger of the Texas Country Day School and the Cathedral School for Boys, St. Mark's is known for a rigorous classical curriculum, strong STEM programs, and a robust community-service tradition.

St. Paul's School is an Episcopal, fully residential boarding school for grades 9-12 in Concord, New Hampshire. Every student and most faculty live on the 2,000-acre campus, creating an immersive community grounded in the humanities, sciences, arts, and Episcopal tradition.

St. Sebastian's School is a Catholic all-boys day school in Needham, Massachusetts, affiliated with the Oblates of the Virgin Mary. ISL member known for strong academics, athletics, and a values-driven community with smaller class sizes.

St. Stephen's Episcopal School is a co-ed boarding and day school in Austin, Texas, known for its strong arts program, outdoor education in the Texas Hill Country, and proximity to the University of Texas. One of the top prep schools in the Southwest.

Suffield Academy is a co-ed boarding and day school in the Connecticut River Valley, known for its strong postgraduate program, diverse international enrollment, and competitive athletics. One of Connecticut's oldest prep schools with a close residential community.

Tabor Academy is a coeducational boarding and day school on Sippican Harbor in Marion, Massachusetts, billed as the 'School by the Sea.' Tabor has a signature marine and nautical science program, an oceanographic research vessel, and strong sailing and crew traditions.

Thayer Academy is a co-ed day school just south of Boston with direct Red Line T access, awarding over $11.6 million in need-based financial aid annually. ISL member with strong academics and competitive athletics in a suburban campus setting.

The Blake School is a coeducational PK-12 independent day school with three campuses in the Minneapolis area. Founded in 1900, Blake emphasizes a rigorous liberal-arts program, strong athletics, and a longstanding commitment to community service and civic engagement.

The Dalton School is a co-ed day school on the Upper East Side of Manhattan, known for its progressive Dalton Plan curriculum emphasizing independent study and collaboration. One of New York City's most prestigious and academically rigorous independent schools.

The Ethel Walker School is an all-girls boarding and day school in Simsbury, Connecticut, known for its equestrian program, STEM initiatives for girls, and close-knit community. One of the few remaining all-girls boarding schools in New England.

The Governor's Academy, founded in 1763, is the oldest continuously operating boarding school in the United States. Located on a 450-acre campus on Boston's North Shore, it offers a balanced coeducational program with strong athletics and a focus on character.

The Hill School is a coeducational boarding and day school in Pottstown, Pennsylvania. Founded in 1851, Hill emphasizes seminar-style learning around Harkness tables, a formal family-style dinner tradition, and a close-knit residential community drawing students from across the U.S. and the world.

The Hockaday School is an all-girls PK-12 independent school in Dallas, with boarding available for grades 8-12. Founded in 1913, Hockaday sits on an 88-acre campus and is one of the largest all-girls day schools in the country, known for its rigorous college-prep program, competitive athletics, and its Institute for Social Impact.

The Hotchkiss School is a coeducational boarding school in Lakeville, Connecticut, set on a 827-acre lakeside campus with a 200-acre working farm. Hotchkiss blends rigorous academics with environmental stewardship and a strong arts and humanities tradition.

The Hun School of Princeton is a coeducational boarding and day school located in Princeton, New Jersey, minutes from Princeton University. Founded in 1914, Hun offers a strong college prep curriculum with a postgraduate year option, competes in the Mid-Atlantic Prep League, and is known for its diverse international student body.

The Lawrenceville School is a coeducational boarding and day school in Lawrenceville, New Jersey, organized around a distinctive House system in which students live and dine with faculty and classmates throughout their careers. Founded in 1810, Lawrenceville is known for the Harkness method, a rigorous liberal-arts curriculum, and strong athletics on a 700-acre Olmsted-designed campus.

The Loomis Chaffee School is a coeducational boarding and day school in Windsor, Connecticut. The 'best self' ethic and the Norton Family Center for the Common Good drive a service-oriented community on a 300-acre island campus at the confluence of the Connecticut and Farmington Rivers.

The Madeira School is an all-girls boarding and day school in McLean, Virginia, just minutes from Washington D.C. Known for its unique co-curriculum program where students spend alternating weeks in academic study and professional internships in the nation's capital.

The Nightingale-Bamford School is an all-girls day school on Manhattan's Upper East Side, known for developing intellectually curious, confident young women. Strong STEM programs for girls alongside arts, athletics, and exceptional college placement.

The Northwest School is a co-ed boarding and day school in the Capitol Hill neighborhood of Seattle, known for its progressive approach to education, arts focus, and global citizenship curriculum. One of the few boarding schools in urban Seattle.

The Pennington School is a Methodist-affiliated coeducational boarding and day school founded in 1838 in central New Jersey. One of the more affordable Mid-Atlantic boarding options, Pennington offers a strong college prep program that emphasizes character, community, and a balanced student experience.

Co-ed day school in Weston, MA, offering grades 6–12 with a strong emphasis on music, arts, and academic depth. Awarded over $7.6 million in financial aid in the most recent year. ISL member with a close-knit community feel.

The Spence School is an all-girls day school on Manhattan's Upper East Side, founded in 1892 and known for exceptional academics, strong leadership development, and consistent placement at the nation's most selective universities.

The Taft School is a coeducational boarding school in Watertown, Connecticut, with a motto of 'Not to be served but to serve.' Taft balances rigorous academics with a strong service ethic and Division I athletics, particularly in hockey and squash.

The Thacher School is a coeducational boarding school in Ojai, California, set on a 425-acre ranch campus in the Los Padres foothills. Founded in 1889, Thacher is distinctive for its Horse Program — every freshman cares for their own horse — its wilderness camping trips, and a rigorous academic program built around small discussion-based classes.

The Waterford School is a coeducational PK-12 independent day school on a 43-acre campus in Sandy, Utah, at the foot of the Wasatch Mountains. Founded in 1981, Waterford is built around a liberal-arts tradition with required Latin, a strong classical and humanities program, and integrated fine arts across grades.

The Webb School is a coeducational boarding and day school in the small town of Bell Buckle, Tennessee. Founded in 1870, Webb is one of the oldest continuously operating boarding schools in the South and emphasizes a traditional classical curriculum, an honor code, and a small residential community.

The Webb Schools comprises Webb School of California (boys) and Vivian Webb School (girls) on a shared campus in Claremont, California, with coordinated classes and a shared boarding program. Webb is unique in operating the Alf Museum of Paleontology, the only accredited paleontology museum on a secondary school campus, where students conduct real fossil research.

The Westminster Schools is a coeducational Christian day school in Atlanta, Georgia, serving pre-first grade through 12. Founded in 1951, Westminster is one of the largest independent schools in the Southeast and offers a rigorous college-prep curriculum on a 180-acre campus in Buckhead.

Small co-ed boarding and day school in central New Hampshire with a strong focus on individual student growth. Known for arts integration across the curriculum and a welcoming, structured community. Competitive in NEPSAC athletics.

Trinity School is a co-ed day school on the Upper West Side of Manhattan, founded in 1709 and one of the oldest schools in continuous operation in the United States. Known for exceptional academics, consistent Ivy League placement, and the full resources of New York City.

The University of Chicago Laboratory Schools is a coeducational nursery-through-12 day school founded by John Dewey in 1896 as a working laboratory for his progressive educational theories. Located in Hyde Park on the UChicago campus, Lab serves faculty families and the broader community with a rigorous program grounded in inquiry-based learning.

Vermont Academy is a co-ed boarding and day school in the Connecticut River Valley of southern Vermont with strong skiing, hockey, and outdoor programs. Emphasizes character, curiosity, and hands-on learning in a rural New England setting.

Virginia Episcopal School is a small coeducational Episcopal boarding and day school in the foothills of the Blue Ridge Mountains in Lynchburg, Virginia. Known for its close community, honor tradition, and individualized attention, VES offers strong outdoor education and athletics programs in a scenic campus setting.

Wasatch Academy is a co-ed boarding and day school in central Utah, one of the oldest schools west of the Mississippi. Known for its diverse international student body, access to world-class skiing, and one of the most affordable boarding tuitions in the West.

Wayland Academy is a small co-ed boarding and day school in Beaver Dam, Wisconsin, one of the oldest prep schools in the Midwest. Known for its supportive community, individualized attention, and one of the most affordable boarding tuitions in the region.

Western Reserve Academy is a co-ed boarding and day school in Hudson, Ohio, founded in 1826 and one of the oldest prep schools in the Midwest. Known for rigorous academics, strong college placement, and a close residential community on a historic New England-style campus.

Westminster School is a co-ed boarding and day school in Simsbury, Connecticut, known for rigorous academics, strong arts and athletics, and a warm residential community. Consistently strong college placement to highly selective universities.

Westtown School is a coeducational Quaker boarding and day school on a 600-acre campus in West Chester, Pennsylvania. Founded in 1799, Westtown integrates Quaker values of simplicity, equality, and service throughout a PK-12 continuum, with a boarding program beginning in grade 9 and a strong environmental-stewardship tradition tied to its own lake and farm.

William Penn Charter School is a co-ed Quaker day school founded in 1689 in Philadelphia, one of the oldest schools in the United States. Known for its Quaker values of integrity and community, strong academics, and excellent college placement.

Williston Northampton School is a coeducational boarding and day school in the Pioneer Valley of western Massachusetts. With both a Middle School (7-9) and Upper School (9-12), Williston offers a broad curriculum, strong arts, and an emphasis on personalized learning.

Woodberry Forest School is an all-boys, fully residential boarding school on a 1,200-acre campus in Madison County, Virginia. Founded in 1889, Woodberry emphasizes an honor code, small seminar-style classes, and a highly traditional residential community for grades 9-12.

Worcester Academy is a co-ed boarding and day school in Worcester, Massachusetts, known for its strong postgraduate program and diverse international student body. One of New England's oldest prep schools with robust college prep academics and competitive athletics.