Tirumala Sundara Sri Ranganath (17 July 1946 – 19 December 2015) was an Indian actor known for his works primarily in Telugu cinema and a few Tamil films. In a film career spanning more than forty years, Ranganath starred in more than three hundred feature films in a variety of roles. He made his debut with the 1969 Telugu film Buddhimantudu.

Subsequently, he starred in films such as Chandana, Zamindarugari Ammayi, America Ammayi, Devathalara Deevinchandi, Andame Anandam, Panthulamma and Intinti Ramayanam while establishing himself as one of the finest actors in Telugu cinema. Apart from acting in several serials, he has also directed a feature film titled Moguds Pellams (2005). Ranganath received state Nandi Awards for his works. Ranganath committed suicide at his residence in Hyderabad on 19 December 2015.

Ranganath was born Tirumala Sundara Sri Ranganath in Madras on 17 July 1946 into the family of T. R. Sundara Raju and T. R. Janaki Devi. He then graduated with a B.A. degree from Sri Venkateswara University, Tirupati. Ranganath then worked as ticket collector for the Indian Railways before becoming an actor. His wife Tirumala Chaithanya died in 2009. They had two daughters, and a son, Tirumala Nagendra Kumar.

Ranganath was found hanging in his residence at Hyderabad on 19 December 2015 at about 5 pm by his housemaid. Family members rushed him to the hospital, but he was declared dead on arrival. Police investigated the situation, and upon autopsy and further evidence, confirmed suicide.