- 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
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.