- 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
Senior Environmental Club
The official name of the club shall be the Senior Environment Club of S.Thomas’ College Mount Lavinia. The objective of this club is to enable students to develop deeper environmental awareness and engagement, assist in their academic and professional development, and work towards environmental betterment and it has members comprised of students from the Lower Fourth Form to the Upper Sixth form who are interested in the Environment.Latest Project
Debate on 'is it ethical to use animals for testing
A debate was organized on behalf of the world environment day. The topic of the debate was 'Is it ethical to use animals for testing' .This debate was held among our M6&L6 Students and Mrs.Inoka Muthuthanthri was invited as the judge for this event. the proposing team was able to eliminate the opposing team succesfully and both teams were awarded with E-Certificates for participating.