
History - A Lion's Legacy

Celebrating 50 Years: 1976-2026
Welcome to ISK’s rich history, a journey spanning 50 remarkable years of growth, achievement, and community. As we celebrate our 50th Anniversary, we invite you to explore the milestones and memories that have shaped our school’s legacy from its founding in 1975 to the vibrant institution it is today. Discover the stories behind the dates and join us in commemorating this special milestone together.

Our Historical Timeline
From 1976 to 2018
2018 and Beyond

Celebrating 45 Years of Learning Together
During the 2021-2022 school year, ISK celebrated its 45th anniversary.Despite the challenges post by the Coronavirus pandemic,ISK adated by implementing contant innovations to enhance student learning while priotizing their saftey.


Establishing Our Identity: The International School of Kenya
In 1976, with an enrollment of 485 students, Nairobi International School was renamed the International School of Kenya (ISK). By 1982, ISK offered its first International Baccalaureate (IB) class. Since then, ISK has established itself as one of the world's premier and most diverse international schools, attracting students from around the globe. The school's expansion has not only been in terms of student population. We have also constructed world-class facilities, including one of Nairobi's best swimming pools and a new state-of-the-art track and field.

A Growing Legacy: Nairobi International School
In 1970, the United States International University (USIU) acquired the school and relocated it to its current site on the former coffee plantation at the end of Peponi Road. They renamed it Nairobi International School (NIS), expanded the grade offerings from 4th Grade to 12th Grade, and even introduced college courses. Despite only having a white wooden house and two stone buildings at that time, the vision for a school like ISK was already apparent.

Our Community’s First Step: US Community School
In 1967, the late Mrs. Nancy Ellen Crooks opened the doors to the US Community School in a house near Nairobi Hospital. Well known for her passion for education, Mrs. Crooks became the first principal dedicated to addressing the educational needs of Kenyan and expatriate children in Nairobi.






















