Sivaganga is a Town and headquarters of the Sivaganga district in the Indian state of Tamil Nadu.

Sivaganga District is one of the 38 districts in Tamil Nadu state, India. This district was formed on 15 March 1985 by trifurcation of Ramanathapuram district into Ramanathapuram, Virudhunagar and Sivaganga districts. Sivaganga is the district headquarters. Karaikudi is the most populous town as well as City Corporation in the district. It is bounded by Pudukkottai district on the Northeast, Tiruchirappalli district on the North, Ramanathapuram district on South East, Virudhunagar district on South West and Madurai district on the West. The area's other larger towns include Sivaganga, Kalayar Kovil, Devakottai, Manamadurai, Ilaiyangudi, Thiruppuvanam, Singampunari and Tiruppattur. As of 2011, the district had a population of 1,339,101 with a sex ratio of 1,003 females for every 1,000 males.