Sivaganga is administered by a municipality established in 1965. As of 2011, the municipality covered an area of and had a population of 40,403. Sivagangai comes under the Sivaganga assembly constituency which elects a member to the Tamil Nadu Legislative Assembly once every five years and it is a part of the Sivaganga constituency which elects its Member of Parliament (MP) once in five years. Roadways are the major mode of transportation to the town and it also has rail connectivity. The nearest seaport, Thoothukudi Port, is located from Sivaganga, while the nearest airport, Madurai International Airport, is located from the town.