Dharma Devathai is a 1986 Indian Tamil-language action drama film directed by S. P. Muthuraman and produced by AVM Productions.
The movie stars Vijayakanth, Sarath Babu, Radhika, and Pallavi in its lead roles. It serves as a remake of the 1986 Telugu film Prathidhwani.
Chandrasekhar (played by Sarath Babu), a strong-willed union leader at a factory, faces constant opposition from Azhagusundaram (Jai Ganesh). The conflict escalates when Chandrasekhar is murdered. His brother Vijayakanth and his widow Radhika then seek revenge against Jai Ganesh.
The soundtrack features music composed by Raveendran with lyrics penned by Vaali. The film was released on 1 November 1986, alongside another Vijayakanth starrer Thazhuvatha Kaigal.