- Sankar, S.
- Sankaran, Vasumathi
- Santharam, V.
- Saraswati, P.
- Satagopan, S. Ms.
- Sathasivam, Kumaran
- Sathyanarayana, M. C.
- Satyanarayana, M. C., Dr.
- Saxena, Rajiv
- Silas, E. G.
- Simmons, Nancy
- Sivaprasad, P. S.
- Sivaraman, Pankajam
- Sivshankar, Avinash
- Sreekumar, B.
- Sreenath, Sushama
- Sridhar, T. R.
- Sridhar, T. S.
- Srivastava, P.
- Sundararaman, V.
- Sunder, S. Shyam
- Suresh, H. S.
- Suryanarayana, M. C.
- Suryanarayanan, T. S., Dr.
Madras Naturalists' Society
