Nidhiram Sardar () is a 1976 Indian Bengali-language vigilante action film directed by Rabi Ghosh in his debut. Produced by Deepen Bhattacharya under the banner of Subhadeep Chitram, the film stars Uttam Kumar in the titular role, alongside Aparna Sen, Utpal Dutt, Subhendu Chatterjee, Tarun Kumar and Ajitesh Banerjee in other pivotal roles.
Written by Ashok Ghoshal, the film drew inspirations from the folklores of Robin Hood, while Ghosh himself cited the film as a felicitation to ' (1969) and Magnum Force (1973). Music of the film is composed by Ananda Shankar, with lyrics penned by Gauriprasanna Mazumder. Soumendu Roy handled its cinematography and Ramesh Joshi did the editing.
Nidhiram Sardar was theatrically released on 24 September 1976, coinciding with Durga Puja. It became moderately successful at the box-office, and received mixed reviews: praise for its action sequences, cinematography and cast performances, and criticism for the slow-paced editing, screenplay and storyline. It was remade into Telugu as Gharana Donga (1980) starring Krishna.