| Honorific-Prefix: | Hon. |
| Rishi Senthil Raj (RS) | |
| Native Name: | ரிஷி செந்தில் ராஜ் රිෂි සෙන්දිල් රාජ් |
| Native Name Lang: | ta |
| Office1: | Leader of Upcountry National Front |
| Term Start1: | 14 January 2012 |
| Office2: | Tamil Leader of Join Oppotition |
| Term Start2: | 1 November 2015 |
| Term End2: | 18 November 2019 |
| Constituency Mp3: | Nuwara Eliya District |
| Parliament3: | Sri Lankan |
| Term Start3: | 1 November 2015 |
| Office4: | Tamil Leader of the Sri Lanka Podujana Peramuna Alliance for Nuwara Eliya District |
| Term Start4: | 2015 |
| Term End4: | 2019 |
| Birth Date: | 20 May 1979 |
| Party: | Upcountry National Front |
Rishi Senthil Raj, colloquially known as RS, (Tamil: ரிஷி செந்தில் ராஜ்; born 20 May 1979) is a Sri Lankan politician and Party Leader. He is the Leader of the Upcountry National Front (UNF), He is Professionally Doctor of Philosophy (PhD) in Computer Science. Rishi is a Sri Lanka political strategist and tactician specialised in AI Robot Political Research Technology. He is a powerful businessman, Gemologist and Gem Trader. What is said about him in political circles is that he is a Game changer and Master mind Creator.
Rishi Senthil Raj was born on 20 May 1979.[1] He was educated at St Anthonys College, Colombo, and Vivekananda College, Colombo. He did his Graduation in Switzerland and USA[2] He is married.[1] [2]
Raj was elected to Upcountry National Front and became its leader in 2012.