Montgomery International School is an accredited IB (International Baccalaureate) school welcoming students from primary education through to the IB Diploma (5 to 19 years old).
Located in the heart of Brussels, near NATO and the European Institutions, our school brings together a diverse and caring community that supports meaningful academic growth through a holistic and engaging approach to learning.

With a 100% success rate in the IB Diploma over six consecutive years and results consistently above the global average, Montgomery International School is proud to be recognised among the leading international schools in Brussels.

Our guiding principles include an innovative curriculum, a commitment to academic excellence, a deep understanding of our students, strong student-teacher connections, and a culture of care.

From primary all the way to secondary, we offer a programme entirely in English with French as a second language or a bilingual programme with French and English immersion courses. Moreover, we are the only school in Brussels which grants the Advanced Bilingual IB diploma, a significant advantage when applying to universities.

In September 2023, Montgomery International School officially joined the French educational group ERMITAGE, which includes 4 other schools located in France.  While this change opens up new opportunities, it remains perfectly aligned with our mission to offer students the very best in a caring environment where everyone finds their place.