Headmasters' and Headmistresses' Conference (HMC)

Federation of British International Schools in Asia (FOBISIA)

International Schools Association of Thailand (ISAT)

Office for National Education Standards and Quality Assessment (Thailand) ONESQA

Office of the Private Education Commission (OPEC)Websitewww.harrowschool.ac.th

Harrow International School Bangkok (Thai: โรงเรียนนานาชาติฮาร์โรว์กรุงเทพฯ, RTGS: Rong Rian Nana Chat Haro Krung Thep) is a British international school in Don Mueang District, Bangkok, Thailand.

It was established and gained its license to operate in Thailand in 1998 in association with Harrow School, a boarding school for boys in London, United Kingdom. The school has over 1800 students, both boys and girls, ranging in age from 18 months to 18 years, representing 36 different nationalities. The school is divided into two day schools, upper and lower, and bases its education on the English National Curriculum. Harrow Bangkok specialises in boarding provision for students from Year 5 upwards. The majority of teaching staff are recruited from the United Kingdom and Ireland.

The current Head Master, Mr. James Murphy-O'Connor joined the school in 2023.

Harrow International School was founded in 1998 and first operated as a language school at Riverine Place Condo. The first headmaster was Mr Stuart Morris, who had previously been headmaster of a school in Malaysia. Mr Morris oversaw a period of growth as the school's enrolment rose to over 700 students in 2002.

Dr J Mark Hensman, previously a headmaster in his native New Zealand, took over as headmaster and oversaw the school's relocation to a purpose-built campus at Don Mueang, near Don Mueang Airport, in 2003. The new 35-acre campus included new facilities, sports fields and boarding houses, and allowed the school enrolment to increase to 1,160. During his tenure, the iconic boater and the House system were introduced, strengthening ties to the original Harrow School.

Beginning in 2013, Michael Farley, Head Master between 2012 and 2018, launched a 5-year redevelopment programme.

Harrow Bangkok is operated by a private company, Harrow Asia Limited. Harrow Asia Limited also oversees Harrow International Schools in Beijing, Hong Kong and Shanghai.

All Harrow International Schools are operated under a license granted by Harrow School in London. Close ties exist within the Harrow family, with teacher and student exchanges, interviews for the international schools being held at Harrow School, and day-to-day co-operation between staff and management across the network. Two governors from Harrow School London are on the board of governors of Harrow International Schools and they regularly visit the schools.

In 2006 Harrow International School gained accreditation from the Council of International Schools (CIS). Harrow Bangkok is also a member of the Federation of British International Schools in Asia (FOBISIA); South East Asia Student Activities Conference (SEASAC) and the International Schools Association of Thailand (ISAT).

As of 2024 there are 1846 students. 147 students board at the school.

• Harrow School, in the UK
• Harrow International School Hong Kong, in Hong Kong
• Harrow International School Beijing, in China
• Harrow International School Shanghai, in China

• Harrow International School Bangkok web site
• Harrow International School Bangkok Alumni