- 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
Histoarcheo Club
The Histo-Archeo Club of S.Thomas' College was started in 2015 under the patronage of Mr M.K.A.S Bandara. The aim of our Club is to explain to the fellow students the rich heritage and history of our motherland. The Club organises seminars to Ordinary Level History Students and carries out epigraphy reading class for all interested students. The History Archeo Club also organises annual field trips for the members. The membership of our club is open to all students.Latest Project
Webinar
The members of the club participated for a webinar on "Introduction to Heritage Management" conducted by Institute of Archaeology and Heritage studies conduct by prof Gamini Wijesuriya. This webinar was conducted by 30 August 2021. This webinar helped students to gain knowledge on our heritage and how it has to be preserved.