The Doon School (informally Doon School or Doon) is a selective all-boys private boarding school in Dehradun, Uttarakhand, India, which was established in 1935. It was envisioned by Satish Ranjan Das, a lawyer from Calcutta, as a school modelled on the British public school while remaining conscious of Indian ambitions and desires.The school admitted its first pupils on 10 September 1935, and formally opened on 27 October 1935, with Lord Willingdon presiding over the ceremony. The school's first headmaster was Arthur E. Foot, an English educationalist who had spent nine years as a science master at Eton College, England.
The school houses roughly 580 pupils aged 12 to 18, and admission is based on a competitive entrance examination and an interview with the headmaster. Every year boys are admitted in only two-year groups: seventh grade in January and eighth grade in April. As of May 2019, boys from 26 Indian states as well as 35 non-resident Indians and foreign nationals were studying at Doon. The school is fully residential, and boys and most teachers live on campus. In tenth grade, students take the Cambridge IGCSE examinations, and for the final two years can choose between the Indian School Certificate or International Baccalaureate. A broad range of extra-curricular activities, numbering around 80, are offered to the boys, and early masters such as R.L. Holdsworth, J.A.K. Martyn, Jack Gibson and Gurdial Singh established a strong tradition of mountaineering at school. The school occupies the former site of the Forest Research Institute and is home to diverse flora and fauna. Doon remains a boys-only school despite continued pressure from political leaders to become coeducational. Old boys of the school are known as 'Doscos'.