During the 2016–2017 timeframe, by-elections were held in Tamil Nadu, India, due to the following events:
25 May 2016 - Tirupparankundram AIADMK MLA S M Seenivel died 5 December 2016 - Radhakrishnan Nagar AIADMK MLA and CM of Tamil Nadu J. Jayalalithaa died
Events leading to By-Election Date Event ADMK DMK INC IUML Independent Vacant Total 19 May 20162016 Tamil Nadu Legislative Assembly election (Election to Aravakurichi and Thanjavur were cancelled by the EC on confirmed reports of bribing voters) 134 898 1 0 2 232 25 May 2016Tirupparankundram AIADMK MLA S M Seenivel dies 133 898 1 0 3 231 First By-Election (19 November 2016) 136 898 1 0 0 234 6 December 2016RK Nagar AIADMK MLA, Tamil Nadu CM J. Jayalalithaa dies 135 898 1 0 1 233 Disqualification of 18 dissident AIADMK MLAs 117 898 1 019 215 24 December 2017Second By-Election (21 December 2017) 117 898 1 1 18 216 2 August 2018Tirupparankundram AIADMK MLA A.K. Bose dies 116 898 1 1 19 215 7 August 2018Tiruvarur DMK MLA, Former CM of Tamil Nadu CM M Karunanidhi dies 116 888 1 1 20 214 20 February 2019Hosur AIADMK MLA P. Balakrishna Reddy convicted by special court 115 888 1 1 21 213 21 March 2019Sulur AIADMK MLA R Kanagaraj dies 114 888 1 1 22 212 23 May 2019Third By-Election (18 April 2019) 123 101 8 1 1 0 234 29 May 2019Nanguneri, Congress MLA Vasanthakumar resigned after being elected to Lok Sabha 123 101 7 1 1 1 233 14 June 2019Vikravandi DMK MLA K Radhamani dies 123 100 7 1 1 2 232
The 123 AIADMK members include three independents who contested under the AIADMK symbol. They are M.Thamimun Ansari from Nagapattinam (Manithaneya Jananayaga Katchi), U. Thaniyarasu from Kangayam (Tamil Nadu Kongu Ilaingar Peravai) and Karunas from Tiruvadanai (Mukkulathor Pulipadai).
November 2018 by-elections On 26 October 2016, the Election Commission announced that the election for Thiruparankundram, Aravakurichi and Thanjavur constituencies would be held on 19 November 2016. The outcome was:
Constituency Contestant DMK Contestant ADMK Winning candidate Winning party Margin Aravakurichi K. C. Palanisamy V. Senthil Balaji V. Senthil Balaji AIADMK 23,661 Thanjavur Anjugam Boopathy M. Rangaswamy M. Rangaswamy AIADMK 26,874 Thiruparankundram Saravanan A. K. Bose A. K. Bose AIADMK 42,670
Aravakuruchi
Tanjore
Thirupparakundram
December 2017 by-elections On 24 November 2017, the Election Commission announced that the election for Radhakrishnan Nagar constituency would be held on 21 December 2017.
See also Elections in Tamil Nadu Government of Tamil Nadu Tamil Nadu Legislative Assembly
References