Kagumo High School is a boy's national secondary school located between Kirichu and Kiganjo townships at Kagumo near Karatina on the Nyeri-Nanyuki road in Kenya.

It was one of the first schools in Kenya to allow native black Africans to sit for university level entrance exams, doing so in 1946. It is one of the best high schools in Kenya, with prominent old boys in Kenya and globally. It has several notable alumni including lawyers, doctors and politicians such as the constitutional lawyer Gibson Kamau Kuria .

In academics, sports and creative arts this school has a long-standing rivalry with Nyeri High School, with meetings between the two schools, particularly in rugby, and basketball the most intense.