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.
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.