The Council of International Schools (CIS) is a global non-profit membership organization that provides services to schools, higher education institutions and individuals focused on international education.

All CIS member schools are committed to incorporating international and intercultural perspective into their programmes so that students can move forward with the attitudes, knowledge and understanding that will provide them with a solid base wherever their studies or work may take them. To become members of CIS, schools participate in a rigorous application process which includes an evaluative visit to the school by a CIS staff member to ensure the school meets the membership criteria and standards. All member schools also agree to support and uphold the CIS Code of Ethics.

Families with children attending CIS member schools know the school meets the CIS membership criteria and is committed to meeting the needs of its students and helping them to achieve their potential. In addition, students have access to the University Connection Registry that connects them with universities around the world that are recruiting students from CIS member schools. Students at member schools are also eligible for nomination to receive the International Student Award which recognizes outstanding students for projects which exemplify internationalism.

CIS membership enables a school to participate in CIS programmes and services. For example, after a school becomes a member it can apply to begin the CIS International Accreditation process and participate in events and programmes that link schools with member universities.