Ganja Karuppu, born Karuppu Raja, is an Indian film actor who plays comedy roles in Tamil cinema. He has appeared in many well-known Tamil films like Raam (2005), Paruthiveeran (2007), Subramaniyapuram (2008), and Naadodigal (2009). He is also a regular guest judge on Asathapovathu Yaaru on Sun TV in Chennai.
Ganja Karuppu made his film debut in a small supporting role in Bala's Pithamagan in 2003. He received critical acclaim for his performance as Vazhavandhaan in the 2005 thriller film Raam directed by Ameer Sultan. Subsequently, he was signed up in a number of Tamil films to provide comic relief, the most notable being Thaamirabharani, Paruthiveeran, Subramaniapuram, Naadodigal and Kalavani. He also played a lead role, along with Santhanam, in the 2008 comedy film Arai En 305-il Kadavul by Chimbudevan. He is going to play solo hero in a film called Mannar Valaiguda. He has been signed by Rajinikanth to provide comic relief in his forthcoming film Rana.