Manamadurai is the 187th state assembly constituency in Tamil Nadu. It is a Scheduled Caste reserved constituency located in Sivaganga district. It is a component of Sivaganga Lok Sabha constituency. In 2008, Ilaiyangudi Assembly constituency was merged with Manamadurai Assembly constituency under the constituency delimitation act. It is one of the 234 State Legislative Assembly Constituencies in Tamil Nadu, in India.
Some of the major demands of people in Manamadurai constituency include constructing new bus stands at Thiruppuvanam and Suranam and upgrading the bus stands present in Manamadurai, Ilaiyangudi and Salaigramam, and also to operate the TNSTC Karaikudi division bus depot located at Manamadurai SIPCOT into a full swing manner instead of operating it as a temporary subdepot. To bring an Agro Based Industry related with capsicum plantations near Ilaiyangudi as these areas have more capsicum plantations. They also include the revival of SIPCOT at Manamadurai and SIDCO at Kirungakottai near Manamadurai and also to operate the announced new SIDCO at Manamadurai as well as upgrading village roads to highway roads which are present between Manamadurai and Naraikudi via Annavasal, Maraiyur and Salaigramam to Devakottai via Suranam, Sarukani. Manamadurai Assembly constituency consists of three taluks namely Manamadurai taluk, Ilayangudi taluk and Tiruppuvanam taluk.
Elections and winners in the constituency are listed below.