Boys' schools in the US are a distinct segment of private education that continues to exist despite the broader shift toward coeducation. As of 2026, there are 29 such boarding schools in the US and Canada, with a total enrolment of 9,485 students. That's a small number, but each offers an environment that's hard to replicate in large coeducational schools: small class sizes, a high level of structure, and attention to each student.
What a Single-Sex Environment Offers
Research doesn't give a definitive answer on whether boys learn better without girls. Some studies show a modest academic gain, others find none. A more consistent effect concerns subject choice: graduates of boys' schools are more likely to choose STEM and more likely to enrol in four-year colleges. Whether this is due to the absence of girls or simply because these schools are mostly private and well-funded is up for debate.
The practical side is more straightforward. In a single-sex classroom, there is less social distraction, especially during adolescence. Teachers can structure lessons around how boys process information: more movement, competition, and hands-on tasks. In a coeducational school this is also possible, but it depends on the individual teacher. Here it's embedded in the culture.
How Such Schools Are Structured
Most American boys' schools that accept international students are private boarding schools. Profiles vary — military academies with strict routines, religious schools, and secular schools focused on academics and outdoor education.
Missouri Military Academy has been operating since 1889. The day runs on a military schedule — wake-up, formation, academic blocks, physical training, evening study. The base boarding cost for 2026–27 is $41,615 for all students, plus an international fee of $2,500 and mandatory charges, including $3,456 for a uniform. The total for a new international cadet is $45,081. The school graduates around 200–250 cadets, many of whom go on to military academies — West Point, Annapolis, the Air Force Academy.
Blue Ridge School in Virginia is a secular school with 188 students on a 750-acre mountain campus. There is no military discipline, but there is a mandatory outdoor education programme: hiking, rock climbing, and working on the farm. The average class size is 11, with a student-teacher ratio of 6:1. Full boarding for 2026–27 costs $71,900. The school offers ESL courses for international students — from $11,250 to $13,500 per year — and specialised support for dyslexia and ADHD.
Woodberry Forest School in Virginia is one of the few fully boarding schools for boys. Only upper grades attend, from ninth to twelfth, and all live on campus. The school is known for its strong academic programme and mentoring system, where older students oversee younger ones. The annual cost is $69,850, covering accommodation, meals, and all school activities — with no extra fees.
Avon Old Farms in Connecticut has 405 students, an average class size of 12, and a student-teacher ratio of 6:1. Boarding costs $72,300 per year for all students. The school accepts SSAT; TOEFL is required for international students. Applications are accepted until 15 January, with decisions released on 10 March.
There are more affordable options. Camden Military Academy in South Carolina offers boarding at $31,995 per year for Americans and $42,995 for international students, plus a uniform at $2,495. The school has capacity for around 250 cadets, with a student-teacher ratio of 8:1. St. Catherine's Academy in California is a Catholic school with a military tradition for boys in grades four through eight. Full boarding costs $66,047, including room, board, and personal expenses. English lessons are charged separately at $3,600, and medical insurance for international students at $3,000.
Who This Suits
A boys' school makes sense in several situations. If a teenager gets lost in a mixed group, is shy about speaking up, or spends energy on social pressures instead of studying, a single-sex environment removes some of that pressure. If a family needs structure — military, religious, or simply a strict routine — such schools offer it built in. For international students who need to adapt to the American system, small boarding schools with a high percentage of international students offer more support than large schools where a child might slip through the cracks.
There is also a downside. A single-sex environment does not prepare students for constant interaction with women in professional life. Critics point out that single-sex education can preserve stereotypes. For some boys, the absence of girls is a relief; for others, it is a source of stress. The choice depends on character and prior experience.
What You Need for Admission
The basic set of documents is the same for most schools: transcripts for the last two to three years with English translations, recommendations from mathematics and English teachers, and essays from the student and parents. Standardised test requirements vary. Avon Old Farms accepts SSAT for grades nine and ten but does not insist on it for older students. Blue Ridge School accepts applications on a rolling basis. For strong schools, TOEFL iBT is usually 80–100, IELTS — 6.5–7.0.
For an F-1 visa, you need an I-20 form from the school and proof of financial capacity. Deadlines for autumn admission are most often in January, but some schools, including Blue Ridge, accept applications on a rolling basis until places are filled.
The decision to choose such a school should come after visiting the campus or speaking with the admissions office. The format does not suit everyone, and it is easier to check this in advance than to change schools mid-year.