International School of Phnom PenhVerified

In Brief

ISPP is the default first call for most international families arriving in Phnom Penh - non-profit, parent-governed, strong IB results, and 35+ years in the city. If you're on a corporate package, it's a safe, well-regarded choice; if self-funding, the Grades 11-12 total of around US$29,500 warrants a close look at what's included.

ISPP sits at the top of the Phnom Penh pecking order by longevity, governance, and academic track record. Founded in 1989 as Cambodia's first international school, it's non-profit and parent-governed - which matters in a city where most international schools are commercially owned. The 1:9 teacher-to-student ratio and 22-student class cap are tighter than most regional peers, and the 2025 IB cohort averaged 33 points with a 98% pass rate.

The Chamkarmon campus puts you in the most convenient part of the city for most international families - close to BKK1, the diplomatic quarter, and most expat housing clusters. Families with children across multiple year groups appreciate the single-site structure. The 50+ nationality cap of 30% per grade avoids the mono-national feel that affects some Phnom Penh schools.

The cost is real: Grades 6-10 total around US$27,500 including the capital levy, and Grade 11-12 sits near US$29,500. There's also a US$3,500 one-time entrance fee for KG and above. Families we've spoken to on the Phnom Penh school circuit say waitlists for popular year groups can run long - register early, particularly for Primary.