Ranked purely by parent interest — the number of families who opened each school’s profile and spent time reading it between August 2025 and July 2026.
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.
Annual fees
KHR 15,993,793 – 15,993,793
Ages
Ages not listed
Curriculum
Singapore Curriculum, Cambridge (Primary), Cambridge (Secondary), Cambridge IGCSE, Cambridge International AS Levels, Cambridge A Levels
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.
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.
Annual fees
KHR 13,400,000 – 30,240,000
Ages
2 to 18 years
Curriculum
American Curriculum, Advanced Placement (AP), Bespoke Curriculum
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).
Annual fees
KHR 22,077,001 – 42,929,731
Ages
2 to 17 years
Curriculum
Cambridge (Primary), Cambridge (Secondary), Cambridge IGCSE, Cambridge International AS Levels, British Curriculum, Bespoke Curriculum
Northbridge International School Cambodia is an all-through International Baccalaureate (IB) World School serving students aged 2–18 on an 8-hectare campus in Sen Sok, Phnom Penh. The school first opened in 1997 in a then-rural area of western Phnom Penh; the website describes the campus as now being a leafy oasis within a rapidly expanding part of the city and notes facilities including an Aquatics Centre, covered basketball and tennis courts, a dedicated Early Learning area and performing-arts spaces. Students follow the full IB continuum (PYP, MYP and DP) and the school connects to Nord Anglia's Global Campus for international projects and exchanges. Instruction is in English with additional language teaching (Khmer, Mandarin, Korean, French and Japanese at DP). The IB Diploma includes a CAS programme that works with local NGOs. Admissions information on the school website notes EAL support for non-native English speakers and a year-round, non-selective admissions process.
Zion International School of Phnom Penh (ZISPP) operates multiple Phnom Penh campuses and uses the International Early Years Curriculum (IEYC) for ages 2–5 and the International Primary Curriculum (IPC) for primary classes; its secondary programme is Cambridge-aligned (IGCSE and AS/A Level pathways). The school opened its first (Early Years) campus in 2015 in the Russian Market / Toul Tom Poung area and later expanded with a Chbar Ampov campus (2022) and a new Primary & Secondary campus that had a soft opening on 12 March 2024. ZISPP highlights STEM teaching alongside IPC units, runs a Sports Academy (swimming, team sports) and a range of after-school clubs (e.g., taekwondo, coding, performing and visual arts). The website lists phone/email contact for admissions and asks parents to contact the school for fees and enrolment details.
Annual fees
KHR 14,758,196 – 17,440,411
Ages
2 to 18 years
Curriculum
IEYC (International Early Years Curriculum), IPC (International Primary Curriculum), Cambridge IGCSE, Cambridge International AS Levels, Cambridge A Levels
New Gateway International School (NGIS) was founded in 2011 and is presented on the school site as a tri-lingual institution teaching Khmer, English and Chinese. NGIS delivers the Cambodian (Khmer) curriculum alongside UK Cambridge programmes in Primary and Secondary and an IEYC programme for Early Years; graduates receive Cambodian high-school certification and Cambridge qualifications. The school lists multiple Phnom Penh campuses: a head office/campus near the National Olympic Stadium (Veal Vong) and at least one campus closer to the airport (Sen Sok). Facilities noted on the site include a research laboratory, a computer laboratory, a library, and extracurricular provision such as arts, music and a sport club (swimming, soccer and related activities). The site also describes regular teacher–parent conferences and semester academic reports for parents.
Annual fees
KHR 13,179,041 – 23,907,101
Ages
2 to 18 years
Curriculum
IEYC (International Early Years Curriculum), Cambridge (Primary), Cambridge (Secondary), Cambridge IGCSE
Canadian International School of Phnom Penh (CIS) is a private international school serving Nursery through Grade 12; the school opened in 2012 and is accredited by Alberta, Canada. CIS has three campuses (Koh Pich is the main campus for Elementary, Middle and High School) and publishes a 2025–2026 Fee Guide on its website for detailed tuition and payment plans. The school offers the Alberta (Canadian) curriculum in English and, as an IB World School, delivers the IB Primary Years Programme and IB Diploma Programme alongside Alberta pathways. CIS runs bilingual programs in French and Mandarin (the French program holds the LabelFrancÉducation recognition) and provides Khmer, Mandarin and French language classes across grade levels. Specialist programs noted on the website include an Artist-in-Residence program, a Soccer Academy (Grades 6–12), and robust after-school activities and clubs. Boarding and a bus/buggy service are listed among school services; prospective families are directed to the published fee guide and Admissions team for fee, boarding and transport details.
Invictus International School Phnom Penh is a co‑educational day school for students aged 3–18 that follows the UK Early Years Foundation Stage in Nursery and Reception, the Cambridge Primary and Lower Secondary programmes, IGCSE and Cambridge A‑Levels. The campus is on Preah Norodom Boulevard (Street 41) at 144C and occupies a large refurbished building previously used as a university. The school lists 60 classrooms (30 primary, 30 secondary), dedicated Physics, Biology and Chemistry laboratories, a library and a large hall. Early Years offers bilingual options (English paired with Khmer, French or Chinese) and lessons across primary and secondary are conducted in English; additional languages taught include Khmer, Chinese (Mandarin) and French. Class sizes are capped at 25 students. Co‑curricular activities include football, swimming, acoustic guitar, dance and Jiu Jitsu. The school's published 2025–26 tuition schedule is on the website.
Annual fees
KHR 15,040,000 – 35,248,000
Ages
3 to 18 years
Curriculum
EYFS (Early years foundation stage), Cambridge (Primary), Cambridge (Secondary), Cambridge IGCSE, Cambridge A Levels
