Kadayanallur Assembly Constituency in Tenkasi district, Tamil Nadu, falls under Tenkasi Lok Sabha and serves a diverse rural region blending agriculture and trade near the Western Ghats. C Krishnamurali of AIADMK is the current MLA, elected in 2021 with 88,474 votes (43.08% share), defeating IUML’s K A M Muhammed Abubacker (64,125 votes) by a margin of 24,349 votes, continuing in office as of March 2026. Key issues feature irrigation challenges tied to seasonal rivers, underdeveloped rural infrastructure including roads and power, limited healthcare facilities, youth employment shortages, and minority welfare demands in this agriculturally vital area.