International School Bangkok (ISB)

International School Bangkok (ISB) is one of Thailand's oldest and most prestigious international schools, founded in 1951 and consistently ranked among the top international schools in Southeast Asia. Located in the Nichada Thani residential estate in Pak Kret, Nonthaburi — a leafy, campus-like suburb north of Bangkok — ISB offers the American curriculum from Pre-Kindergarten through Grade 12, with a comprehensive Advanced Placement (AP) programme and the IB Diploma as an alternative pathway at the senior level.

ISB enrols around 1,700 students from over 50 nationalities, with a student body that reflects the full diversity of Bangkok's large expatriate community — from corporate and diplomatic families to NGO workers and long-term expats. The school is dual-accredited by CIS and WASC and is widely regarded as the flagship American international school in Thailand. University counselling is a major strength, with ISB graduates regularly accepted at Ivy League universities, top UK institutions, and leading universities in Asia and Australia.

The Nichada Thani campus is among the most impressive school environments in Southeast Asia — a sprawling, purpose-built facility featuring a 50-metre aquatic centre, multiple performing arts spaces, an Olympic-weight room, and extensive technology and makerspace facilities. The school's location within the Nichada Thani residential community means that many ISB families live within walking distance of the campus, creating an unusually integrated and cohesive school-community relationship.