1999–2000 Tamil Nadu Legislative Assembly by-election

By-elections to Natham and Thiruvattar constituencies were held in Tamil Nadu, India, on September 5 and 11, 1999 respectively. Elections for three state assembly constituencies, Nellikuppam, Tiruchirappalli - II and Arantangi were held on February 17, 2000.

In the first phase, TMC lost a seat to ADMK and Dravida Munnetra Kazhagam (DMK) lost a seat to Communist Party of India (Marxist) (CPI (M)). In the second phase, ADMK splinter party MADMK, was able to pick up a seat from ADMK and DMK was able to hold on to its seats.


  • The number on the left, in the table, represents the total number of MLAs after the by-election, and the number in parenthesis represents, the seats picked up or lost due to the by-election
  • The numbers presented for 1996, represents, the alliance, when the TMC and the left allied with the DMK.

    Constituents and results

    Source: Election Commission of India



    Source: Tamil Nadu Legislative Assembly


    Tiruchirappalli - II