Thanga Rangan is a 1978 Indian Tamil-language film written and directed by S. R. Dakshinamurthy.
The movie stars Thengai Srinivasan as Rangan, a rickshaw puller, alongside Vijayakumar and Srividya who plays his lover Ponnamma. Kannan portrays Kesavulu, Rangan's brother-in-law, whose actions form a key part of the plot involving molestation.
Notable production details include scenes filmed at Paramount Garden and Vauhini Studios. The soundtrack features music composed by M. S. Viswanathan.
The film was released on 30 October 1978, coinciding with Diwali day. It received mixed reviews; while P. S. M., the Kalki magazine editor, praised the performances of Thengai Srinivasan and Srividya, Ananda Vikatan gave it a low rating citing its predictability.