2016–2017 Tamil Nadu Legislative Assembly by-elections

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