The American School of Zagreb was founded in May 1966 to serve the needs of the American community residing in Zagreb.
School from its humble beginnings on September 23, 1966 when 13 children and three staff members opened the school at Tuškanac 46 where the school remained for 17 years. During the late 1970’s and early 1980’s, the school’s population fluctuated in size between 40 and 70 students.
The school moved to Zelengaj 45 in 1983. A second house at Zelengaj 6 was added in 1991 to accomodate the middle school. In early 1991, the Republic of Croatia declared independence. War broke out in Croatia during the summer of 1991 and reached Zagreb. Families and staff members were evacuated and ASZ was closed for the first semester. Classes resumed in January 1992 with three children.
In 1993, the school moved up the street to a house at Zelengaj 45 1B. As the school continued to grow, it expanded into the house next door at Zelengaj 45 1A. In 1998, the school changed its name to the American International School of Zagreb to reflect its growing international population. AISZ remained at the Zelengaj addresses and served 110 students from Kindergarten to Grade 8.
In 2000, the American International School of Zagreb moved to its present location in the southeast wing of the Inter-Diocesan Seminary at Voćarska 106. In 2001 a commitment was made to expand to a full high school program and to add a Junior Kindergarten.
In June 2004 AISZ’s senior class graduated from the American International School of Zagreb.