International School Bangkok (ISB)
Key Stats
Annual Fees: US$19K – US$34K
Curriculum: IB · American · AP
Age Range: 3–18
Students: ~1,800
Location: Nonthaburi (Nichada Thani), Bangkok
Updated February 2026
In Brief
International School Bangkok is Thailand's first international school, founded in 1951, offering American curriculum with IB and AP options to 1,700 students from 60+ nationalities on a purpose-built campus in Nichada Thani. Teacher and parent discussions consistently rank ISB among Bangkok's top three schools alongside NIST and Bangkok Patana, though its suburban location northwest of central Bangkok requires consideration for families prioritizing urban convenience.
ISB operates as a non-profit institution serving students from pre-kindergarten through Grade 12 with an American-style curriculum enhanced by International Baccalaureate and Advanced Placement programs. The school's campus in Nichada Thani provides extensive facilities within a gated community environment, though this location means families living in central Bangkok areas like Sukhumvit or Sathorn face significant commute times. Multiple teacher discussions describe ISB as having 'one of the nicest campuses' visited, with the suburban setting offering respite from Bangkok's urban intensity while creating what some describe as a 'bubble' environment.
Parent and teacher feedback consistently places ISB in Bangkok's tier-one international schools, with discussions highlighting excellent university placement rates and strong academic programs. The school's American curriculum approach appeals to families seeking US-style education, while IB and AP options provide international recognition. Teacher discussions suggest ISB offers competitive compensation packages and can represent 'a lifetime appointment with an excellent package' for educators, though recent leadership changes have created some uncertainty according to teaching community discussions.
What parents value
- –Consistently ranked among Bangkok's top three international schools
- –Beautiful, well-resourced campus in safe Nichada Thani community
- –Strong university placement and academic outcomes
- –Excellent teacher packages and retention rates
- –Non-profit status allows reinvestment in educational programs
- –American curriculum with IB and AP options provides flexibility
- –Diverse student body from 60+ nationalities
- –Thailand's oldest international school with established reputation
Points of consideration
- –Location in Nichada Thani requires significant commute from central Bangkok
- –Recent leadership changes have created some uncertainty
- –Campus described as somewhat isolated or 'bubble-like' environment
- –Premium fees reflect tier-one status
- –Friday afternoon traffic particularly challenging for families
- –Limited public transportation options to campus location
Annual Fees
| Year Group | Age | USDTotal Annual Fee |
|---|---|---|
| All grades | 3–18 | 37,128 |
Fees converted from THB. For the most up to date and accurate figures please double check with the school.
Photos

Academic Results
Class of 2025: 95 students earned the IB Diploma with an average score of 34 points (global average 30.58). 34% of students earned the IB Bilingual Diploma. 28.5% of eligible students took at least one AP exam, with 277 exams completed in total.
Extra Curriculars
Sports: Soccer, Cross Country, Basketball, Track & Field, Badminton, Swimming, Touch Rugby, Mini Volleyball, Baseball, Softball, Gymnastics, Golf, Tennis. Arts/Music: Panther Arts, Panther Dance, Panther Music, Cultural Convention (Debate, Forensics, Drama, Dance, Music, Art), Dance Showcases, Drama Productions, Music Concerts/Festivals. Clubs: Direct Service Clubs, Indirect Service (fundraising) Clubs, Advocacy Clubs, Language and Culture Clubs, Student Leadership Clubs, Special Interest Clubs, Arts Clubs, Athletics Clubs, Model United Nations (MUN), Math Contest.
Campus Size: 37-acre main campus in Nichada Thani, plus a 15-acre Environmental Wilderness Campus (EWC) in Petchaburi Province. Swimming Pools: Olympic-sized pool and 25-meter pool. Sports: 5 indoor gymnasiums, grass pitches, running track, cross country track, gymnastics gym, rock climbing wall, baseball field, fitness center, golf center, 12 tennis courts.
Inspections & Accreditations
Inspection
- Not publicly listed.
Accreditations
- Not publicly listed.
Memberships
Membership details are not publicly listed.
Student Body
Total Enrolment: Approximately 1,700–1,800 students. Nationalities: Over 60 nationalities. Student-Teacher Ratio: 9.3:1 (as of 2018-2019 data).
Leadership
Debi Caskey - Acting Head of School / Deputy Head of School for Learning
Contact the school for details.
