The ABC International School (originally the ABC English School) was established in 1995 at a time when Ho Chi Minh City lacked options in international education for children of foreign investors, expatriates and Vietnamese nationals. The school began with 12 students in a playgroup and nursery class and added new classes each year. By 2001 the school catered for 70 children from Playgroup to Year 6, teachers were increasingly recruited from overseas and the school formally began to follow the British National Curriculum. At this time, the school name was altered to the ABC International School to reflect the growth of the school and the diversity of the students and staff. In 2003, the school was registered in the UK with the Qualifications and Curriculum Authority (QCA) and Department for Education and Skills (DfES).

At this stage, the school was involved in a very rapid phase of expansion and growth as its popularity grew. The school moved into its first purpose built campus in Saigon South in 2004 and shortly afterwards, we were obliged to move to the larger present campus at Saigon South as the student population then exceeded 500. In 2005 the school was accredited by Cambridge University (UK) to teach the International General Certificate of Secondary Education (IGCSE) and Advanced level examinations. In the same year, the school successfully applied for membership of the Federation of British International Schools in South and East Asia (FOBISEA). Currently, The ABCIS is the only School in Vietnam to be acknowledged and accepted as a member of the Council of British International School (COBIS); a group of the most prestigious and best of British curriculum schools abroad that uphold the very highest academic standards and are recognised by the British Government. Similarly, it is the only school in Vietnam to offer examinations from Assessment and Qualifications Alliance (AQA) board.