Most popular international schools in Phnom penh

Western International School (WIS) opened on 1 September 2003 and operates multiple campuses across Phnom Penh, with additional branches in Takhmao and Sihanoukville. The school offers Pre‑K through Grade 12 programmes described on the website as aligned with Northern American standards; half‑day classes are taught in English, while full‑day classes use both English and Khmer. WIS lists a range of subjects from early years through secondary (including English, Khmer and Chinese language instruction), and runs summer and international exchange programmes (about 15 students go to the USA each year). The Contact and Profile pages list the headquarters (Stadium/Main Campus) address and the many campus addresses across the city. The school website publishes a School Fees page for the 2024–2025 year but the fee schedule is presented as images/PDFs on that page (amounts were not extractable as text from the website during this check).

ICS International School (ICSIS) operates from two campuses in Khan Daun Penh, Phnom Penh: the Main Campus at 14, Street 214, and the Calmette Campus at 25A, Street 75 (Corner of Street 80). The school opened in 2005 and is a Cambridge International Centre (KH008). Nursery and Kindergarten programmes follow the Singapore Curriculum and the Cambridge English Teaching Framework, with most instruction delivered in English and Khmer studied as needed. Primary education uses the Cambridge Primary Programme alongside the national curriculum. The Secondary & High School Programme (Grades 7–12) provides a bilingual pathway that combines the Cambridge International Curriculum (Lower Secondary/IGCSE, AS & A Levels) with the MoEYS Cambodian Curriculum to align local graduation requirements with international qualifications. The school emphasizes enquiry-based learning and a broad co-curricular program. The Co-Curricular Activities include Khmer Language and Mandarin Language, plus swimming and other sports. All Kindergarten and Primary classes are taught in English except Khmer studies. Khmer and Mandarin are also offered as languages within the curriculum.

CIA FIRST International School was founded in 2004 and operates multiple campuses in Phnom Penh, serving a student community of 5,500+ across its campuses. The school offers WASC-accredited international programmes that blend US-aligned standards (Common Core, AERO, NGSS) with Advanced Placement (AP) courses; it also runs Ministry-recognised Khmer programmes and a Khmer Language & Culture option. Campuses are based in Sen Sok (Street 2004 and a separate Sen Sok High School site), Chbar Ampov (near Bayon TV), and Russey Keo (Street 330). The school lists services for families including a school bus network, campus front desks, and a preschool pathway; it highlights AP Capstone and multiple AP offerings for high-school students. Practical details (addresses, fee schedule, admissions age range and bus service) are published on the school website and in the downloadable AY2025–2026 fees document.

True Visions International School (Cambodia) describes itself as offering education in English, Khmer and Chinese across early years through high school. The site states the school follows the Official Khmer curriculum from the Ministry of Education, Youth and Sport (MoEYS) for Khmer classes, while units such as reading, writing, maths, science, history and humanities are taught in English. Programmes include a Day Care Centre, Kindergarten (K1–K3), Primary School and High School. The site highlights that every child learns from a native English speaker and refers to small class sizes.

Paragon International School (Paragon ISC) was established in 1997 and operates a single purpose-built campus at Land № 402, Plov Lom (Svay Pak) in Khan Russey Keo, Phnom Penh. The school offers both an International programme (Cambridge Primary → IGCSE → AS/A levels) taught in English and a Bilingual programme that combines the Khmer national curriculum with selected Cambridge subjects; it is also a registered Cambridge centre and holds international accreditation. Paragon's age policy covers toddlers through Grade 12 (typical entry ages shown on the school site are 2 — 17 years). The school lists an extensive co-curricular programme including STEM & Robotics, arts and language clubs, and it coordinates contracted school-bus routes for families. The Head of School is Mr. Artur Tulepbekov. Note: the school website provides application, enrolment, registration and capital fee figures (in USD) but does not publish a single annual tuition range by grade on its public pages; the site should be contacted or the prospectus requested for an exact tuition schedule. (Sources: Paragon ISC site: history, contact/address, curriculum pages, age-level, clubs and transport).