- 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
Commerce Society
"The Commerce Society of S. Thomas’ College has been a frontier society which has contributed in changing the thinking patterns of young students and molding them to be responsible and productive citizens in the society for over a decade.
This society led by the Advanced level students of the Commerce and Arts Stream has been involved in making a change for a better cause through the help of Commerce."
Latest Project
Eclipse’21
Talent Competition named as, “Eclipse ’21" We the commerce society of S. Thomas’ College Mount Lavinia wish to provide the students with the opportunity to showcase their talents in photography, singing, short story writing and drawing, in which there will be four separate competitions.