Mang'u High School is a Kenyan Roman Catholic National High School established in 1925, located in Kiambu County along the Nairobi-Thika Highway six kilometres from Thika, Kenya. Mang'u High School is ranked among the top schools nationwide in Kenya Certificate of Secondary Education and has many eminent alumni including one Kenyan president and several vice presidents
The school policy rotates around hard work in the conformity with the school motto of "jishinde ushinde", a call for self conquest and self discipline. The school for the first time broke the national record by becoming number one national wide. Mang’u high school was the first to introduce aviation as an examinable subject in the country.