The school celebrated its 50th anniversary during the 2013/14 school year.

Zurich International School was formed in 2001 through the merger of the American International School of Zurich, founded in 1963, and the International Primary School of Zurich, founded in 1970. The school has grown and developed extensively and today has more than 1,500 students aged 3 to 18 studying at one of four campuses.

Explore our interactive timeline and learn more about the school.

Interactive Timeline


The American International School of Zurich (AISZ) opens at the Spinnergut Villa in Kilchberg, a former family home built in 1914.


The Spinnergut Villa in Kilchberg is extensively renovated and expanded.


The new state-of-the-art Upper School opens in Adliswil. The Middle School moves to the Spinnergut Villa in Kilchberg. Lower School in Baden opens in a former Swiss school building.


Early ZIS opens in Wädenswil. This has since moved to the Early Childhood Center in Kilchberg.


The English Language Kindergarten (ELK), later to be renamed the International Primary School of Zurich (IPSZ), opens in Horgen.


AISZ and IPSZ merge to form Zurich International School.


Baden Campus expands to include a Middle School.


The Baden Lower and Middle School moves into a brand new purpose-built building in the center of Baden. This campus closed in 2015.


IPSZ outgrows its home and moves to the current Early Childhood Center villa, a former family home built in 1906 on the shore of Lake Zurich in Kilchberg.


The purpose-built Lower School opens in Wädenswil.


Thanks to the generosity of the ZIS Community, the new outdoor playground opens at the Lower School Wädenswil.


The school implements Learning First, a whole school curriculum framework guiding teaching and learning.

About Us

With more than 1,450 students at four unique campuses, ZIS offers an extensive educational program with all the benefits of size but the intimacy of smaller settings.



We know that choosing the right school is one of the most important decisions you can make for your child. Our Admissions Team is here to help and guide you through the process.


Learning at ZIS

At ZIS we recognize the unique and diverse nature of our students. That’s why accommodating the individual learning needs of each and every student remains our highest priority.


Student Life

Co-curricular activities challenge our students’ personal, social and physical development and encourage a greater passion for learning. Opportunities range from the arts to sports to outreach and service work and beyond.



ZIS has four unique campuses offering a personal experience to each of our students. Whether it is an old villa or one of our modern buildings, ZIS offers an age-appropriate environment for your child’s learning.



The ZIS community extends beyond our students and includes ZIS families, alumni, faculty and staff, corporate partners, neighbors and friends.



Once a member of our community, always a part of our family around the world! Our alumni include former students, former parents and former faculty and staff. At ZIS we welcome our alumni’s engagement and strive to help you stay connected with your ZIS.


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Contact Us


Admissions - Prospective Families
+41 (0) 58 750 2531
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Main Office
+41 (0) 58 750 2500
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Early Chlldhood Center
+41 (0) 58 750 2250
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Lower School, Wadenswil Campus
+41 (0) 58 750 2200
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Middle School, Kilchberg Campus
+41 (0) 58 750 2300
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Upper School
+41 (0) 58 750 2400
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