Ruamrudee International School Bangkok (RIS)
Key Stats
Annual Fees: US$15K – US$22K
Curriculum: IB
Age Range: 2–18
Students: ~1,100
Location: Bangkok
Updated February 2026
In Brief
Ruamrudee International School is an established American curriculum institution with two Bangkok campuses, known as one of the city's older international schools but positioned firmly in the mid-tier rather than elite category. While it offers reasonable academic programs and facilities, teacher discussions reveal concerning management issues and the school's Christian identity may not suit all families.
Founded as one of Bangkok's earlier American international schools, RIS operates two campuses with the main site in Minburi about 20km from central Bangkok and a newer Ratchapruek location. The school follows US curriculum pathways with AP and IB Diploma options, serving a diverse student body from over 40 nationalities. RIS maintains its Christian foundation prominently, with chapel services and faith-based values integrated throughout school life, which appeals to Bangkok's established Christian expatriate community but may limit broader appeal.
Teacher feedback presents mixed experiences, with some praising reasonable workloads, small class sizes, and respectful students, while others report management problems including frequent leadership changes and administrative difficulties. Recent discussions mention concerning issues with leadership, though supporters note the school's established reputation within American curriculum circles. The suburban location requires personal transport or shared rides, positioning it away from Bangkok's central expatriate communities but offering a quieter campus environment with boarding facilities for those seeking residential options.
What parents value
- –Well-established American curriculum school with AP and IB Diploma programs
- –Small class sizes and reasonable teacher workloads reported by some staff
- –Two campus locations providing options for different areas of Bangkok
- –Boarding facilities available for families seeking residential education
- –Strong Christian community for families seeking faith-based education
- –Generally respectful and pleasant student body according to teacher reports
Points of consideration
- –Located 20km from Bangkok city center requiring personal transport
- –Strong Christian identity may not suit non-religious families
- –Recent teacher reports mention serious management and leadership concerns
- –Positioned as mid-tier rather than top-tier in Bangkok's competitive market
- –Mixed feedback on administrative communication and school operations
- –Less recognition in British curriculum circles compared to American networks
Annual Fees
| Year Group | Age | USDTotal Annual Fee |
|---|---|---|
| Pre-K 2-4 | 3 | 16,798 |
| KG | 4 | 16,985 |
| Grade 1 | 6 | 22,414 |
| Grades 2-5 | 7 | 21,403 |
| Grades 6-8 | 11 | 22,339 |
| Grades 9-12 | 14 | 24,523 |
Fees converted from THB. For the most up to date and accurate figures please double check with the school.
Additional Fees
| Fee | Amount |
|---|---|
| Application Fee | 156 |
| Registration Fee | 6,240 |
| Learning Resources Fee | 1,248 |
| Re-Enrollment Deposit | 1,560 |
Photos

Academic Results
Class of 2025: IB Diploma pass rate: 97%; Average total score: 34 points (Global average: 30); Highest score: 45; 54% earned a Bilingual Diploma. AP Results (Class of 2025): 119 students took 264 exams; 105 exams scored 3 or above. Class of 2026 Grade Distribution (as of 2025): 8% at 4.0+ GPA; 26% at 3.75-3.99; 23% at 3.50-3.74.
Extra Curriculars
Sports: Member of SEASAC and BMAC. Offers football, volleyball, basketball, tennis, rugby, swimming, softball, badminton, golf, and cross-country. Arts & Music: Performing Arts Center (PAC), Liguori Gallery, and mini-theaters.
Campus: 29-acre clean-air campus in Minburi. Academic & Arts: Separate buildings for elementary, middle, and high schools; Performing Arts Center (PAC); Liguori Gallery; Godbout Hall; mini-theaters; science labs. Libraries: Elizabeth Library (PreK-Grade 5) and Griffith Library (Grades 6-12) with 100,000+ materials.
Inspections & Accreditations
Inspection
- Thai MoE accredited/registered historical, pre-1992
- Not publicly listed.
Accreditations
- No mentions of CIS, NEASC, COBIS/BSO with rating, ISQM, or others published
Memberships
- BISAC, SEASAC
- No mentions of FOBISIA, EARCOS, Round Square, ISAT, Apple Distinguished School, HPL, Eco-Schools, Duke of Edinburgh, or others published
Student Body
Total Enrollment: 1,011 students (Pre-K to Grade 12). Class Sizes: Pre-K (12-14), Kindergarten-Grade 5 (18-22), Grades 6-12 (approx. 22).
Leadership
Dr. James O’Malley - Head of School
Dr. James O’Malley holds a B. an in Physical Education from Florida State University, a M. S in Educational Leadership from the University of Central Florida, an Ed.D in Educational Leadership & Policy, and a Graduate Certificate in Program Evaluation from Florida State University.
