The Old Cottonians' Association was formally founded in the year 1927, during the Headship of Rev. A.E. Scipio and in 70 years it has grown to a large fraternity of old students, spread world-wide with associations in Canada, USA., Perth and Melbourne in Australia and UK. The Old Cottonians fraternity has upheld the objective of the Association, of fostering continual fellowship with its 'Alma Matter' and maintaining the friendly relationships amongst the Alumni.

The OCA publishes an annual magazine "The Old Cottonian" informing its members of the activities and achievements of the School and the Association and its members, who have reached the pinnacle of their careers. The magazine is given to every member during the St Peter's Tide held at the end of June. The occasion brings in large gatherings of old cottonians both from India and Oversea, actively participating in cricket, football matches played between the past and present cottonians, as a part of the two day celebrations of St. Peter's Day and Old Cottonians' Day. The Annual General Meeting of the Association is held during the occasion finally culminating in the Reunion Dinner, in addition to the other reunions held during the year, to relive the nostalgic memories of yester years.

The Association has Mr M.G. Muthanna as its Chairman, along with Mr. William Richards (1930 - 39) , The OCA Representative on the School Board Of Management, guiding the Association in fostering and nurturing the links with the Past and Present students.