Maduluwawe Sobitha Thero (; 29 May 1942 – 8 November 2015) was a Sinhalese Buddhist Bikku. He was a well-known socialist and social justice activist. He was a Buddhist style non-violent revolutionary and he led campaigns that toppled the Sri-Lankan government on several occasions. He was the chief monk of the Kotte Naga Vihara. He played a key role to bring a new government in 2015 defeating Mahinda Rajapaksa, where he supported a common candidate Maithripala Sirisena for presidency, and Ranil Wickremesinghe to form a new government. 