- 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
ICT Society
The ICT Society of S. Thomas’ College endeavours to provide a platform for students interested in Information and Communication Technology to showcase their skills and gain knowledge as well as live a more productive life combining technology. The ICT Society plays a major role in bringing College to the forefront using the latest technologies in College activities such as Live Streaming College events to enable worldwide viewers to experience them, carrying out video production requested by College and maintaining the Official College website and app.Latest Project
An Online Webinar on the topic of 'Computer Programming' was held on the 2nd of July 2021 via Google Meet. The Webinar was conducted by past ICT Society Presidents, Suresh Peiris and Kushan Bhareti. There was participation from around 50 students.