Chief Ministers of Tamil Nadu

The complete list of Chief Ministers of Tamil Nadu consists of the heads of government in the history of the state of Tamil Nadu in India since 1920. The area under the present-day state of Tamil Nadu has been part of different territorial configurations under Madras Presidency and Madras State in its history.

The Madras Presidency, headquartered in Fort St. George, was a province of British India that comprised present day Tamil Nadu, the Malabar region of North Kerala, the coastal and Rayalaseema regions of Andhra Pradesh, and the Bellary, Dakshina Kannada, and Udupi districts of Karnataka. It was established in 1653 to be the headquarters of the English settlements on the Coromandel Coast.

The territory under the presidency comprised only Madraspatnam and surrounding regions. But, after the Anglo-French wars and the consequent alliance between the English East India Company and the Nawab of Arcot, it was expanded to comprise the region from Northern Circars to Cape Comorin. Alongside, the governance structure also evolved from a modest secretariat with a single secretary for the Public Department in 1670 to six departments overseen by a Chief Secretary by 1920. With the enactment of Government of India Act 1919, the first legislature was formed in 1920 after general elections. The term of the legislative council was three years. It had 132 members of whom 34 were nominated by the Governor and the rest were elected.