NIST International School is an international school located in Watthana District, Bangkok, Thailand. It was established in 1992 with support and guidance from the Bangkok-based branch of the United Nations. A full IB World School, NIST welcomes over 1,500 students of over 50 nationalities. As one of the only not-for-profit international schools in Thailand, it is governed by the parent-elected NIST International School Foundation.

NIST is accredited by the Council of International Schools (CIS), the New England Association of Schools and Colleges (NEASC) since 1998 and the Office for National Education Standards and Quality Assessment (ONESQA). It was the first school in Thailand to receive triple accreditation. Additionally, NIST is a member of the East Asia Regional Council of Overseas Schools, the International Schools Association of Thailand.

Several organizations and programs are also based on NIST's campus, including the University at Buffalo, The State University of New York master's in education program; the JUMP! Foundation's Global Leadership Center; and Top Flight Basketball Academy, run by ex-NBA player Ike Nwankwo.

NIST's campus is located in downtown Bangkok near Asok BTS Station, one of Bangkok's commercial hubs.