sivagangai kingdom was founded by sasivarna periya oodaya thevar in 1730. the town was subsequently ruled by his successors and ultimately by velu nachiyar under the stewardship of maruthu pandiyar. they were against the british empire, but ultimately lost to them in 1790. the company appointed gowry vallaba periya oodaya thevar as the zamindar of sivaganga in 1801, whose successors continued with chaos until india's independence in 1947. it was under ramnad district until 1984 and subsequently a part of the newly formed sivaganga district. the town is known for agriculture, metal working and weaving. the region around sivaganga has considerable mineral deposits.