A detailed analysis of voting patterns in Tamil Nadu shows that while the State recorded a high turnout percentage in the 2026 Assembly election, the increase in absolute voter numbers remained lower than in previous election cycles, with distinct regional and demographic variations shaping the trend.
According to provisional data, Tamil Nadu recorded an all-time high turnout of 85.1%, which has been attributed to the Special Intensive Revision (SIR) exercise that led to the deletion of around 68 lakh electors from the rolls. Despite this, the net addition in the number of voters who turned out stood at approximately 24.8 lakh, which is lower than the increase of 31.1 lakh between 2016 and 2021 and 64.8 lakh between 2011 and 2016.
In 220 out of 234 constituencies, the actual votes (not %) increased. And they still say no wave 😷
Maximum increase in semi-urban constituencies at over 10,000 votes per constituency. pic.twitter.com/CiuQJ27cqm
— Zakka Jacob (@Zakka_Jacob) April 25, 2026
At the constituency level, variations were evident across the State. Of the 234 Assembly constituencies, 220 recorded an increase in voter turnout, while 14 saw a decline. Among constituencies, Sriperumbudur registered the highest increase with over 64,000 additional voters, followed by Madhavaram (over 57,000) and Sholinganallur (over 56,000). On the other hand, Madurai South recorded a decline of around 7,200 voters, R.K. Nagar saw a drop of about 6,300, and Thousand Lights registered a decrease of approximately 5,700 voters.
Segment-wise analysis showed that semi-urban constituencies witnessed the strongest growth, with a median increase of 13,652 voters, accounting for nearly 5% of the median electorate in those seats. This was significantly higher than urban areas, which recorded a median increase of 5,175 voters (2.1%). Semi-rural constituencies saw a median increase of 8,962 voters (3.7%), while rural areas recorded a median increase of 7,616 voters (3.2%).
Region-wise data indicated that northern Tamil Nadu experienced the highest growth, with all 41 constituencies in the region recording an increase and a median gain of 10,754 voters, representing a 4.5% rise. Western Tamil Nadu followed with a median increase of 9,154 voters across 56 of its 57 constituencies. Greater Chennai recorded increases in 28 out of 37 constituencies, with nine constituencies registering a decline and a median increase of 8,964 voters (3.4%). The delta region saw gains in 40 of 41 constituencies with a median increase of 7,529 voters (3.2%), while southern Tamil Nadu recorded increases in 55 of 58 constituencies with a median gain of 8,368 voters (3.4%). Overall, the State recorded a median increase of 8,868 voters across constituencies, translating to a 3.6% rise.
The relatively muted growth in urban areas, particularly in Chennai, was attributed to the SIR exercise, which led to higher deletions in electoral rolls. In Chennai alone, nine constituencies recorded a net decline in voter numbers. The city’s electorate dropped from over 40 lakhs in 2021 to about 28.3 lakh in 2026.
Data from Chennai also showed a divergence between turnout percentage and absolute votes. While turnout rose to 83.7% in 2026 from 60% in 2021 and 61.2% in 2016, the total number of votes polled stood at 23.7 lakh, lower than 24.16 lakh in 2021 and 24.3 lakh in 2016. The decline amounted to around 47,000 votes compared to 2021 levels, despite the higher turnout percentage, reflecting the impact of a reduced voter base.
Within Chennai’s constituencies, mixed trends were observed. Kolathur recorded an increase of around 5,000 voters, Thiru Vi Ka Nagar saw a rise of about 7,000, and Velachery recorded an increase of approximately 2,000 voters. Chepauk and Royapuram saw increases of around 1,000 and 3,000 respectively. In contrast, R.K. Nagar recorded a decline of about 10,000 voters, Villivakkam saw 7,000 fewer voters, and Perambur recorded turnout levels similar to the previous election at around two lakh votes, as reported in Times of India.
It is noteworthy that Mannargudi recorded a decline of around 2,600 voters since 2021. Overall, while a majority of constituencies witnessed gains, the data pointed to uneven growth patterns shaped by geography, urbanisation, and electoral roll revisions.
Experts stated that the revised electoral rolls reflect a more realistic electorate and that turnout in absolute numbers does not necessarily determine electoral outcomes. They noted that vote distribution and the presence of multi-cornered contests are likely to play a more decisive role in the election results.
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