- Aeronautical Society
- Art Club
- Association of Innovation and Design
- Association of Science and Technology
- Automobile Club
- Buddhist Students’ Association
- Canto Perpetua Choir
- Carnatic Orchestra
- Classical Music Association
- Commerce Society
- Cubing Society
- Culinary Arts Society
- English Drama Society
- English Lit & Debating Society
- Gavel Club
- Geography Society
- Health Club
- Hewisi Band
- Hindu Students’ Union
- Histoarcheo Club
- HNB Students’ Savings Unit
- ICT Society
- Interact Club
- Islamic Society
- Junior English Lit & Debating Society
- Junior Maths Society
- Junior Science & Technology
- Kennel Club
- Media Unit
- Photographic Club
- Political Science Society
- Productive Citizenship Society
- Quiz Club
- Scuba Diving Unit
- Radio Club
- Red Cross Society
- Road Safety Patrol
- Senior Environmental Club
- Seylan Bank Students’ Savings Unit
- Sinhala Literary & Debating Society
- Society for Social Work & Welfare
- Spelling Union
- Student Christian Movement
- Tamil Drama Society
- Tamil Literary and Debating Society
- The Ternion
- Thomian Union
- United Nations Club
- Western Band
- Wildlife Society
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.