St Francis Girls High School (Mang'u) in Mangu Location, near Thika Town, Gatundu North Constituency started off as a girls boarding primary school in 1944.
In 1964, the primary school was changed into a Harambee secondary school by the Franciscan Sisters who were the founders. This followed a high demand for a girl's secondary school in the area. The school currently has a student enrollment of about 500 students and 70 teaching staff.