Léman Manhattan Preparatory School vs United Nations International School
🇺🇸 New York · Side-by-side comparison on verifiable public data.
Reviewed by Priscilla Han
Which should you choose?
Both run IB, so the difference is inspection rating, boarding, and fees rather than the curriculum itself; Léman Manhattan Preparatory School offers boarding while the other is day-only. The choice comes down to target curriculum, whether you need boarding, and budget — verify fees against each school's own figures.
Neither Léman Manhattan Preparatory School nor United Nations International School sits in a market with a public inspectorate, so both are assessed on verifiable accreditation, curriculum authorisation, and published data rather than an official quality rating. One practical difference: Léman Manhattan Preparatory School offers boarding while the other is day-only — decisive for families who need a residential option. Verify current fees against each school's own figures (see the table below).
Key Facts
| Léman Manhattan Preparatory School | United Nations International School | |
|---|---|---|
| Curriculum | IB / American | IB |
| Ages | 1–18 | 4–18 |
| Languages of instruction | English | English |
| Annual fees | USD 70,700–72,000 (Kindergarten–Grade 12) | USD 46,856–52,167 |
| Enrollment | 750 | 1,450 |
| Boarding | Yes | Day only |
| Accreditations | MSA, NYSAIS | CIS, NYSAIS |
Strengths
- ✓Full vertical continuity under one operator: 12 months through Grade 12, across two purpose-fitted Financial District campuses
- ✓Recognized regional accreditation — Middle States (MSA), accredited through 2031 — plus NYSAIS, ISAAGNY and Parents League membership
- ✓IB Diploma capstone with flexibility (full IB Diploma or individual IB Course Certificates)
- ✓New York City's only residential boarding program (launched 2012) — a genuinely rare offering for a U.S. day school
- ✓Highly international community (100+ nationalities reported) with a small published average class size of 18
- ✓Founding IB school (one of the IB's pilot schools) and among the first to award IB diplomas — deep, credible IB pedigree
- ✓Exceptionally international community: roughly 97–109 nationalities among students and 86–91 mother-tongue languages
- ✓CIS accreditation plus NYSAIS membership and long institutional history (since 1947)
- ✓Strong multilingual programme — every student studies French or Spanish from the early years, adding a third language from Grade 7; nine languages offered
- ✓Single continuous PreK–12 pathway (ages ~4–18) on one Manhattan campus culminating in the IB Diploma
Trade-offs
- !Does NOT publish IB average scores or a verified university-destination list — the headline '80% accepted to highly selective colleges' is school-reported and unverifiable
- !Full IB PYP/MYP continuum is claimed by third-party directories but NOT confirmed on the school's own pages, which describe only an 'IB approach' culminating in the DP
- !Among the most expensive schools in the sample — Kindergarten–Grade 10 at USD 70,700 and Grades 11–12 at USD 72,000 for 2026-27
- !Boarding tuition is not published on the official site (third-party directories cite figures near USD 89,000–95,000 all-in, unverified)
- !The only public enrollment figure (~750) is a 2016-17 third-party number; no current official total is published
- !Does NOT publish IB Diploma average scores or a verified university-destination list — academic outcomes cannot be independently verified
- !Enrollment figures are inconsistent across the school's own pages (cited variously as ~1,427, ~1,450, ~1,454 and ~1,545), so no single precise number is reliable
- !Only the IB Diploma Programme is evidenced — no PYP or MYP authorization is stated, despite a continuous PreK–12 structure
- !EAL/English-language-support provision is not described on public pages and cannot be confirmed
- !The former Queens (Jamaica Estates) K–8 campus closed in 2022, so the school now serves one Manhattan location only
Best Fit For
- • Families in or relocating to Lower Manhattan wanting a single K–12 (indeed toddler-to-18) independent school
- • Families specifically seeking a U.S.-based day school with a genuine residential boarding option
- • Internationally mobile households valuing an IB Diploma pathway and a multinational student body
- • Families who can absorb premium Manhattan private-school fees (financial aid is available from Kindergarten)
- • UN-affiliated and diplomatic families relocating to New York (who receive admissions priority)
- • Internationally mobile, multilingual families wanting a genuinely global IB community
- • Families seeking a continuous PreK–12 IB pathway culminating in the IB Diploma (including bilingual diplomas)
- • Households prioritising a strong second/third-language programme from the early years
University Placement
School-reported · not independently verified
School-reported, unverified: the school states that 80% of graduates are accepted to highly selective colleges, and that IB Diploma students are 'more than 20% more likely' to be admitted to the most prestigious universities. No IB average score, pass rate, or itemized university-destination list is published.
School-reported, unverified: per third-party summary, nearly all graduates attend four-year colleges, with roughly 75%–85% enrolling at universities in the United States and the remainder at universities in about 13 other countries. UNIS does not publish an IB Diploma average score or a specific university-destination list on its own pages; treat placement claims as school-reported and unverified.
More Comparisons
Frequently Asked Questions
Should I choose Léman Manhattan Preparatory School or United Nations International School?
Léman Manhattan Preparatory School is best for: Families in or relocating to Lower Manhattan wanting a single K–12 (indeed toddler-to-18) independent school. United Nations International School is best for: UN-affiliated and diplomatic families relocating to New York (who receive admissions priority). The right choice depends on target curriculum, budget, and family priorities — the two are not linearly comparable.
How do fees compare between Léman Manhattan Preparatory School and United Nations International School?
Léman Manhattan Preparatory School: USD 70,700–72,000 (Kindergarten–Grade 12). United Nations International School: USD 46,856–52,167. Verify against each school's own published fees; some figures are sourced from third-party aggregators.
What curricula do Léman Manhattan Preparatory School and United Nations International School offer?
Léman Manhattan Preparatory School: IB, American. United Nations International School: IB.
Do Léman Manhattan Preparatory School or United Nations International School offer boarding?
Léman Manhattan Preparatory School: offers boarding. United Nations International School: day school only.
Questions parents ask
This comparison is BrightKey's independent assessment using verifiable public data only. University-placement figures are school-reported and not independently verified. BrightKey takes no payments from schools. Our method →