ISB first opened as the International Children’s Center on the grounds of the U.S. Embassy in 1951. It was the first international school to open in Thailand and serviced U.S. Embassy families and other expatriates in Bangkok at the time.

The school was first located on the grounds of the U.S. Embassy but soon needed to expand in order to provide both primary and secondary education for the growing population of expatriate children in Bangkok. In 1960, ISB moved from the U.S. Embassy grounds to a large campus on Sukhumvit Soi 15. Seven years later, at the peak of the Vietnam War, when enrollment boomed to over 3500 students, a second campus was opened in Bangsue for a number of years to accommodate the expansion.

In the 1980’s, the ISB Board of Trustees had a vision for a school that would be unrivalled in the region. In January 1992, ISB moved to its present location in Nichada Thani, a US$25-million campus with some of the best facilities in the region.

2018 marked the opening of our Environmental Wilderness Campus in Petchaburi Province. To this day ISB remains a nonprofit, independent, and nonsectarian school which is overseen by our parents who are members of our school association and elected to our Board of Trustees.