Nanguneri, Congress MLA Vasanthakumar resigned after being elected to Lok Sabha[11]
123
101
7
1
1
1
233
14 June 2019
Vikravandi DMK MLA K Radhamani passes away
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).
First By-Election (19 November 2016)
On 26 October 2016, the Election Commission announced that the election for Thiruparankundram, Aravakurichi and Thanjavur constituencies would be held on 19 November 2016.[12] The outcome was:[citation needed]
On 24 November 2017, the Election Commission announced that the election for Radhakrishnan Nagar constituency would be held on 21 December 2017.[13][14]
2017 Tamil Nadu Legislative Assembly By-election: Dr. Radhakrishnan Nagar
On 13 March 2019, the Election Commission announced that the election for 18 out of 21 vacant constituencies would be held on 18 April 2019. However bypoll for Tirupparankundram, Aravakurichi and Ottapidaram (SC) assemblies were not announced by Election Commission of India as election petitions were pending in court at that time.[15]
On 9 April 2019, Election Commission announced that the by-elections will be held for remaining four vacant assembly constituencies in Sulur, Aravakurichi, Thiruparankundram and Ottapidaram on 19 May 2019 during the last phase of the Lok Sabha elections.[16]