- Philatelic & Numismatic Society
- Robotics Club
- Yoga Club
- Library Club
- Environmental Club
- College Magazine
- Chamber Orchestra
- Cinema Society
- Astronomy Club
- Aquarium Club
- Scuba Diving Unit
- Culinary Arts Society
- Aeronautical Societya
- Junior Science & Technology
- Histoarcheo Club
- Geography Society
- Gavel Club
- Student Christian Movement
- English Lit & Debating Society
- Radio Club
- Junior Maths Society
- Road Safety Patrol
- Sinhala Literary & Debating Society
- Seylan Bank Students’ Savings Unit
- HNB Students’ Savings Unit
- Kennel Club
- Buddhist Students’ Association
- Junior English Lit & Debating Society
- Art Club
- Spelling Union
- Carnatic Orchestra
- Canto Perpetua Choir
- Western Band
- Tamil Drama Society
- Hewisi Band
- English Drama Society
- Photographic Club
- Society for Social Work & Welfare
- ICT Society
- Senior Environmental Club
- Hindu Students’ Union
- Political Science Society
- Red Cross Society
- Association of Innovation and Design
- Islamic Society
- Association of Science and Technology
- Quiz Club
- Automobile Club
- Cubing Society
- Health Club
- Tamil Literary and Debating Society
- Wildlife Society
- Thomian Union
- Commerce Society
- Interact Club
- The Ternion
- Classical Music Association
- Media Unit
- Productive Citizenship Society
- United Nations Club
Thomian Union
The Thomian Union is the Society dedicated towards uplifting and instilling the true Thomian values within the student body. It also plays a vital role in protecting the rich history of our Alma Mater as the Thomian Union is the society with the responsibility of all matters related to the College Museum. The Union renders a great deal of support in producing a society of gentleman within the general student body, when into the world they go.
Latest Project
Thomian Empowerment Project
The Thomian Union decided to unveil yet another project in it's campaign to empower the student body on how to engage with the audience with great public speaking skills, market one's opinions and proposals effectively and efficiently to the respective authorities. As well as on how to handle the entire process of applying up to the facing of interviews with self confidence and effective communication skills.

