The International School Bangkok (ISB; Thai: โรงเรียนสถานศึกษานานาชาติ, RTGS: Rong Rian Sathan Suksa Nana Chat) is a private PK-12 American-style school in the Pak Kret District of Nonthaburi Province, Thailand in the Bangkok Metropolitan Area.

ISB was the first school in Thailand to offer the International Baccalaureate (IB) Diploma Program (DP).

[1] It was the first international school to open in Thailand and serviced U.S. Embassy families and other expatriates in Bangkok at the time.

A few years later, ISB opened a second campus on Viphavadi Rangsit road, but it closed in the mid-1970s with the American drawdown from Vietnam.

Finally in 1992, ISB was relocated from Soi 15 to the present US$25-million campus in the Pak Kret District, Nonthaburi Province, within Nichada Thani as "campus town"; on a land that it owns and maintains itself, and that consists of a separate elementary, middle, and high schools interwoven into one Thai-style complex.