Tirunelveli district is one of the 38 districts of Tamil Nadu state in India. It is the largest district in terms of area with Tirunelveli as its headquarters. The district was formed on 1 September 1790 by the British East India Company (on behalf of the British government), and comprised the present Tirunelveli and Thoothukudi, Tenkasi and parts of Virudhunagar and Ramanathapuram district. As of 2011, the undivided district (along with Tenkasi) had a population of 3,077,233.