Dhinakaran, nephew of jailed leader V K Sasikala, defeated his nearest rival E Madhusudhanan of the AIADMK by 40,707 votes, officials announced as the counting of votes ended. Polling for the seat was held on December 21.
The bypoll in the Assembly constituency was necessitated following the death of J Jayalalithaa in December last. The late Tamil Nadu chief minister was elected from the RK Nagar seat in north Chennai.
Dhinakaran bettered the record of Jayalalithaa, who had won by a margin of 39,545 votes in the 2016 Assembly polls.
Dhinakaran contested as an independent on the pressure cooker symbol after the Election Commission allotted the 'two leaves' symbol to the factions led by K Palaniswami and his deputy O Panneerselvam.
The two factions had merged in August this year after deposing Dhinakaran and Sasikala, who is serving a four-year jail term in a Bengaluru prison in a corruption case.
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