Old pupils of Rahula College: following is a list of some
- Amara Hewamadduma, SLAS – former Permanent Secretary to the Ministry of Religious and Cultural Affairs and former Permanent Secretary to the Ministry of Social Welfare.
- Ariya Rubesinghe – President’s Media Coordinator, Director of General Media Center for National Development. Ministry Of Mass Media and Information former Director of Information
- Buddhika Pathirana – Matara District MP
- Chandrananda de Silva, SLAS – former Secretary, Ministry of Defence and former Commissioner of Elections
- D. E. W. Gunasekera – Former cabinet minister
- Dhammika Kitulgoda – former District Judge, former Secretary-General of Parliament (1999–2002, 2008–2012 ) and Secretary to the Parliamentary Counsel
- Dixon Nilaweera – former Permanent Secretary Ministry of Finance
- Gunasena Galappatty – Sri Lankan dramatist, and Sinhala Radio Play writer
- H. M. S. Samaranayake – former Chairman of the Sri Lanka Tourist Board
- Kusumsiri Balapatabendi – former Permanent Secretary to the President of Sri Lanka and Diplomat, former Chairman, SriLankan Airlines
- Lalith Weeratunga, SLAS – current Permanent Secretary to the President
- Nandasena Bambarawanage – former Controller of Immigration and Emigration
- Nandasiri Muthukumarana – veteran educationist and administrator
- Pramodya Wickramasinghe – former Sri Lanka Test cricketer
- Ranjan Wijayawardhana – former Matara District MP
- Ranjith Dheeraratne – former Judge of Supreme Courts
- Sarath Wijesinghe – former Sri Lankan Ambassador-designate to the UAE, attorney-at-law, former President of Association of Sri Lankan Lawyers (ASLLU) the United Kingdom, former Chairman of the Consumer Affairs Authority (CAA)
- Somapala de Silva – former Chairman ICTAD
- Suraj Randiv – Sri Lanka cricketer
- Upul Wijayawardhana – Consultant Cardiologist
- Vajira Senaratne, Consultant Cardiologist
- Victor Hettigoda – Sri Lankan entrepreneur
- W. K. Kumarasiri – former secretary – Ministry of Nation Building