The All India Anna Dravida Munnetra Kazhagam (transl. All India Anna Dravidian Progressive Federation; abbr. AIADMK) is an Indian regional political party with the most influence in the union territory of Puducherry and state of Tamil Nadu. It is a Dravidian party adhering to the policies of socialism and secularism based on the principles of C. N. Annadurai collectively coined as Annaism. The party is one of the most successful political outfits in Tamil Nadu and has won the majority in the Tamil Nadu Legislative Assembly most number of times (seven). As of 2025, it is the main opposition party in the legislative assembly. The party is headquartered at Puratchi Thalaivar M.G.R. Maaligai located at Royapettah in Chennai.
The party was founded on 17 October 1972 after a breakaway from the Dravida Munnetra Kazhagam (DMK). M. G. Ramachandran launched the party, which was earlier registered by Anakaputhur Ramalingam, and became the first general secretary. It was founded after Ramachandran was expelled from the DMK by its president M. Karunanidhi after he demanded the accounts of the party as the party treasurer. The party won the elections to the Tamil Nadu Legislative Assembly three times consecutively in 1977, 1980, and 1985 under the leadership of Ramachandran, who served as the chief minister of Tamil Nadu from 1977 to 1987.
