Ituru high school was started in the year 1962 by the Holy Ghost Fathers. Fr Obrien, the founding principal, started by constructing an office which doubled up as his residential room in 1962 from where he oversaw the construction of the Eastern bloc classes starting with the form one.
He started with about 15 students. He financed the electricity 3 phase connection from Gatundu to Ituru.
In 1966 he oversaw the digging of the school borehole.
He first built the chemistry laboratory and then the current principal and deputy’s house and two other staff houses.
He also constructed the wooden staffroom afterwards to double up as the entertainment room. Mr. Joseph Mbugua, the second principal, constructed the Western block of classes in 1976 and the southern block in 1980.
He later constructed the biology laboratory in 1984. The foundation to the Boarding complex was dug in 1987.
Mr. J.M Ngure is reported to have helped the school acquire more pieces of land in the neighborhood (5 pieces) He started the foundation of the current boarding.
Other principal built on this foundation. The following is the list of head teachers who have served in Ituru high School.