Lord Delamere, a British Settler founded the School in 1956 and was initially named after him “Delamere School”. It was mainly for Europeans Boys and Girls who could not make it to Duke of York (now Lenana School) or Prince of Wales (now Nairobi School) which were the only Schools European Children attended. In 1959, the Girls remained at Lady Delamere Girls (now State House Girls) while the Boys moved to Lord Delamere School. In 1969, the School changed its name to “Simba Secondary School “ then later to the present Upper Hill School, named after the Area and Road where the School is situated. It is located along Upper Hill Road, next to the British High Commission Offices and Don Bosco Church on the same Road and rests on a 13.6 Acres piece of Land. Beginning the Year 1997, the School began to change gradually from Day to Boarding and finally became Full Boarding in 2004. It currently accommodates 1000 Students who all board. Initially, the Delamere Hostels hosted the few Students who were Bright and Needy then but over the Years, more Dormitories had to be put up to facilitate the necessary numbers. Currently, the School has 17 Dormitories, a Modern Computer Laboratory, Multi-purpose Hall, Science Laboratories, Administration Block and 20 Classrooms(Tuition Block), a Library, Kitchen and Ten Houses for the Resident Teachers. The School has 12 Heads of Department and 45 Subject Teachers( 7 on Teaching Practice), 34 Non-Teaching Staff and 1000 Students. The Student Body is divided into Five Streams per Class named after Colours – Red, Yellow, Blue, Green and White. The School Motto is “Strive for Excellence” and its Vision is “To be a Leader and a Role Model Academic Institution of Choice both Nationally and Internationally”.