The Kadayanallur Assembly Constituency, located in Tirunelveli district of Tamil Nadu, will participate in the 2026 Tamil Nadu Assembly elections with 17 candidates vying for votes. Key candidates include Rajendran TM from the Dravida Munnetra Kazhagam (DMK) and C Krishnamurali from the All India Anna Dravida Munnetra Kazhagam (AIADMK). The constituency, which has a total of 267,517 voters (including 132,228 men and 135,272 women), is reserved for the General category and has a literacy rate of 82.92% as per the 2011 Census. Voting is scheduled for April 23, 2026, and the counting of votes will take place on May 4, 2026. In the previous 2021 elections, the DMK-led Secular Progressive Alliance secured 159 seats out of 234, while the AIADMK-led National Democratic Alliance won 75 seats.