1996–2001 Tamil Nadu Legislative Assembly by-elections

Tamil Nadu assembly by-election, 1996-2000

8 February 1997 and 22 February 1998, 5 and 11 September 1999 and 17 February 2000

8 vacant seats in the Legislature of Tamil Nadu
 
Leader M. Karunanidhi J. Jayalalithaa
Party DMK AIADMK
Alliance DMK Alliance AIADMK alliance
Leader's seat Chepauk did not stand

Incumbent Chief Minister

M. Karunanidhi
DMK



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

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