Tamil Nadu: one MLA for 5.5 lakh electors, another for 1.2 lakh

• Seat size = registered electors on the roll of 6 April 2026 (the last date of nominations; service electors are not in it), from CEO Tamil Nadu's AC-wise table: 5,73,43,291 in all.
• The final roll of 23 February 2026 has 5,67,07,380 electors; on it Shozhinganallur has 5,36,991 and Harbour 1,16,896 (4.6x).
• Turnout = votes counted (every candidate plus NOTA, EVM and postal, ECI's seat totals) divided by registered electors on the roll of 6 April 2026. News reports on polling night gave Karur 93.41%: that is EVM votes alone on the same roll, without the 1,980 postal ballots. ECI's final turnout also counts rejected postal ballots and service electors; we found no seat-wise table of it, so a seat's figure here can differ from ECI's by a few tenths of a point.
• Winner's votes are the declared winner's total in ECI's results of 4 May 2026 (EVM plus postal).
• Polling stations are the rows of each seat's Form 20 (CEO Tamil Nadu), except Kilvelur and Vedaranyam, whose sheets pad the table with blank placeholder rows (234 and 254 rows; 220 and 240 stations). 16 of the 234 seats have booth sums that differ slightly from ECI's EVM totals. Chengalpattu's published sheet has four stations with no votes printed and seven blank rows, and its booth totals are about 2,300 EVM votes short of ECI's result. This page uses ECI's totals for votes, not the sheets.
• Context on seat numbers and boundaries: What is delimitation, and why does it matter for Tamil Nadu?.

Shozhinganallur (also spelt Sholinganallur) in Chengalpattu district, with 5,53,905 registered electors on the roll of 6 April 2026. The smallest is Harbour in Chennai district with 1,20,126, so the biggest has 4.6 times as many.

Karur had the highest, about 94.3%, and Palayamkottai the lowest, about 70.2%. Turnout here is every vote counted (EVM and postal, plus NOTA) divided by registered electors on the roll of 6 April 2026. Reports on polling night gave Karur 93.41%: that is EVM votes alone over the same roll, without the 1,980 postal ballots.

The roll of 6 April 2026 has 5,73,43,291 registered electors, not counting service electors, which is 6,35,911 more than the final roll of 23 February 2026 (5,67,07,380).

Each seat elects one MLA, but the number of electors is whatever its roll holds, and rolls change: the roll of 6 April 2026 has 6,35,911 more electors than the final roll of 23 February 2026. Seat boundaries were last set by the Delimitation Commission, whose orders were final in 2008. Our page on delimitation explains what has and has not been settled.