In 2022 the College celebrated the 136^th Anniversary of its location at the current site. In that time 18 Principals have led the College and their photographs may be seen under Past Principals.

Construction of its most famous building – ‘Old Building’ (sometimes referred to as ‘Aitchison Hall’) – began in 1887 and was complete by 1890. Its existence is owed largely to three men: Bhai Ram Singh, Colonel Samuel Jacob and John Lockwood Kipling. This was the College’s first real school building for classes, after moving classrooms away from boarding houses and rented bungalows outside the school in Abbott road. The fashion of education that remained traditionally English Public School for much of the 19^th and early 20^th centuries is now modified for the fresh demands of a new era in which boys seek university places here in Pakistan as well as top American, British, Canadian, Australian, Asian, Middle Eastern and European universities. Aitchison has offered Cambridge curriculum since 1936 and also offers Federal (FBISE) as a national equivalent.

Today, Aitchison is a vastly enriched school with many facilities and fine buildings immersed in splendid playing fields and natural surrounds. Some of its past principals are honoured by buildings erected in their honour: Godley House, Leslie Jones House, Kelly House, Barry Block, Gwyn House, and Shamim Khan Hall. The College has also been well supported by generous benefactors over many years; most notably since Independence by Syed Babar Ali - past student 1933-1945 and revered national and international figure.

Aitchison’s long history has not been denied colourful and challenging moments. As with all great schools, it has dealt with them in its own peculiar way. What has survived into the 21st century is a school of 3000 boys where once there were only 12.