DATA JOURNALISM DEEP-DIVEPost-Election Intelligence Report

The Anatomy of a Transformative Mandate

2026 தேர்தல் முடிவுகள்: வரலாற்றுப் புதிய கட்சி எழுச்சி, வாக்கு பிளவு மற்றும் வாக்காளர் மாற்றங்கள்

A rigorous data-driven breakdown of Tamil Nadu’s 2026 general election: examining the structural fracturing of the traditional Dravidian bipolar duopoly, the 60.7% seat turnover, razor-thin third-party splits, and deep urban-rural participation divides.

Seat Turnover
60.7%

142 of 234 seats changed hands from the 2021 legislature.

Debut Plurality
108 Seats

TVK captures working legislative plurality on electoral debut.

New Generation
114 First-Timers

48.7% of the assembly are serving their very first legislative term.

Photo Finishes
15 Seats

Decided by under 1,000 votes, including Tiruppattur by just 1 vote.

Key Finding 1

The Great Party Realignment: Net Seat Shifts (2021 → 2026)

The 50-year bipolar balance was overturned as TVK harvested 65 seats previously held by DMK, 26 from AIADMK, 10 from INC, and 7 from allies.

TVK (Debut Plurality)+108 Seats (0 → 108)
DMK (Incumbent Ruling Party)-65 Seats (133 → 68)
AIADMK (Principal Opposition)-26 Seats (66 → 40)
INC & Allies (Opposition Front)-17 Seats (35 → 18)
Analytical Takeaway

Where did TVK's 108 seats come from?

Flipped from DMK:65 Seats (60.2%)
Flipped from AIADMK:26 Seats (24.1%)
Flipped from INC:10 Seats (9.3%)
Flipped from Left/PMK:7 Seats (6.4%)
Key Finding 2

The Decisive Vote Split: 38 Seats Where 3rd Place Exceeded the Margin

In 38 constituencies, the third-place party (NTK, PMK, or BJP) secured significantly more votes than the difference separating the winner and runner-up.

TiruppatturAC 185
Winner: TVK (Margin: 1 votes)
3rd: NTK (14,210 votes)
Split Ratio14,210× margin
TenkasiAC 220
Winner: DMK (Margin: 384 votes)
3rd: BJP (19,840 votes)
Split Ratio51.6× margin
RadhapuramAC 228
Winner: AIADMK (Margin: 592 votes)
3rd: NTK (16,750 votes)
Split Ratio28.3× margin
KatpadiAC 40
Winner: TVK (Margin: 740 votes)
3rd: PMK (12,430 votes)
Split Ratio16.8× margin

Form 20 Provenance & Coverage Meter

Statutory station-level Form 20 return sheets verified and normalized

7.4%
4,592 of 62,129 booths
15 of 234 Constituencies (6%)
|
Zero PII · EVM Aggregates
View Verification Protocol →

Tamil Nadu 234 Assembly Constituencies Map

Interactive statewide vector map with competitiveness tiers and turnout overlays.

Loading map data…
Gummidipoondi (AC 1) · S. Vijayakumar · TVKPonneri (SC) (AC 2) · Dr. Ravi M.S. · TVKTiruttani (AC 3) · G. Hari · AIADMKThiruvallur (AC 4) · Dr. T. Arunkumar · TVKPoonamallee (SC) (AC 5) · Prakasam R. · TVKAvadi (AC 6) · R. Ramesh Kumar · TVKMaduravoyal (AC 7) · Rhevanth Charan · TVKAmbattur (AC 8) · Balamurugan G. · TVKMadavaram (AC 9) · M.L. Vijayprabhu · TVKTiruvottiyur (AC 10) · Senthil Kumar N. · TVKDr.Radhakrishnan Naga (AC 11) · N. Marie Wilson · TVKPerambur (AC 12) · C. Joseph Vijay · TVKKolathur (AC 13) · V.S. Babu · TVKVillivakkam (AC 14) · Aadhav Arjuna · TVKThiru-Vi-Ka-Nagar(SC) (AC 15) · M.R. Pallavi · TVKEgmore (SC) (AC 16) · Rajmohan · TVKRoyapuram (AC 17) · K.V. Vijay Damu · TVKHarbour (AC 18) · P.K. Sekarbabu · DMKChepauk-Thiruvalliken (AC 19) · Udhayanidhi Stalin · DMKThousand Lights (AC 20) · Prabhakar J.C.D. · TVKAnna Nagar (AC 21) · V.K. Ramkumar · TVKVirugampakkam (AC 22) · Sabarinathan R. · TVKSaidapet (AC 23) · Arul Prakasam M. · TVKThiyagarayanagar (AC 24) · Anand N. · TVKMylapore (AC 25) · Venkataramanan P. · TVKVelachery (AC 26) · Kumar R. · TVKShozhinganallur (AC 27) · ECR P. Saravanan · TVKAlandur (AC 28) · M. Harish · TVKSriperumbudur (SC) (AC 29) · Thennarasu K. · TVKPallavaram (AC 30) · J. Kamatchi · TVKTambaram (AC 31) · D. Sarathkumar · TVKChengalpattu (AC 32) · S. Thiyagarajan · TVKThiruporur (AC 33) · B. Vijayaraj · TVKCheyyur (SC) (AC 34) · Rajasekar E. · AIADMKMadurantakam (SC) (AC 35) · Maragatham Kumaravel K. · AIADMKUthiramerur (AC 36) · Munirathinam J. · TVKKancheepuram (AC 37) · R.V. Ranjithkumar · TVKArakkonam (SC) (AC 38) · V. Gandhiraj · TVKSholingur (AC 39) · G. Kapil · TVKKatpadi (AC 40) · Dr. M. Sudhakar · TVKRanipet (AC 41) · Thahira · TVKArcot (AC 42) · S.M. Sukumar · AIADMKVellore (AC 43) · M.M. Vinoth Kannan · TVKAnaikattu (AC 44) · D. Velazhagan · AIADMKKilvaithinankuppam(SC (AC 45) · Thenral Kumar E. · TVKGudiyattam (SC) (AC 46) · K. Sindu · TVKVaniyambadi (AC 47) · Syed Farooq Basha · IUMLAmbur (AC 48) · Vilwanathan A.C. · DMKJolarpet (AC 49) · Veeramani K.C. · AIADMKTiruppattur (AC 50) · Dr. Thirupathi N. · TVKUthangarai (SC) (AC 51) · N. Elaiyaraja · TVKBargur (AC 52) · E.C. Govindarasan · AIADMKKrishnagiri (AC 53) · Mukundhan P. · TVKVeppanahalli (AC 54) · Srinivasan P.S. · DMKHosur (AC 55) · Balakrishnareddy P. · AIADMKThalli (AC 56) · Ramachandran T. · CPIPalacodu (AC 57) · Anbalagan K.P. · AIADMKPennagaram (AC 58) · Gajendran S. · TVKDharmapuri (AC 59) · Sowmiya Anbumani · PMKPappireddippatti (AC 60) · Maragatham Vetrivel · AIADMKHarur (SC) (AC 61) · Sampathkumar V. · AIADMKChengam (SC) (AC 62) · S. Velu · AIADMKTiruvannamalai (AC 63) · Velu E.V. · DMKKilpennathur (AC 64) · Ramachandran S. · AIADMKKalasapakkam (AC 65) · Agri Krishnamurthy S.S. · AIADMKPolur (AC 66) · Abishek R. · TVKArani (AC 67) · Jayasudha L. · AIADMKCheyyar (AC 68) · Mukkur N. Subramanian · AIADMKVandavasi (SC) (AC 69) · Ambethkumar S. · DMKVandavasi (SC) (AC 70) · Ganeshkumar A. · PMKMailam (AC 71) · Shanmugam C. Ve. · AIADMKTindivanam (SC) (AC 72) · Vanni Arasu · VCKVanur (SC) (AC 73) · Gowtham D. · DMKViluppuram (AC 74) · Lakshmanan R. · DMKVikravandi (AC 75) · Sivakumar C. · PMKTirukkoyilur (AC 76) · Palanisamy S. · AIADMKUlundurpettai (AC 77) · Vasanthavel G.R. · DMKRishivandiyam (AC 78) · Karthikeyan K. · DMKSankarapuram (AC 79) · Rakesh R. · AIADMKKallakurichi (SC) (AC 80) · Arul Vignesh C. · TVKGangavalli (SC) (AC 81) · Nallathambi A. · AIADMKAttur(SC) (AC 82) · Jayasankaran A.P. · AIADMKYercaud (ST) (AC 83) · Usharani P. · AIADMKOmalur (AC 84) · Mani R. · AIADMKMettur (AC 85) · Venkatachalam G. · AIADMKEdappadi (AC 86) · Edappadi K. Palaniswami · AIADMKSankari (AC 87) · Vetrivel S. · AIADMKSalem (West) (AC 88) · Lakshmanan S. · TVKSalem (North) (AC 89) · Sivakumar K. · TVKSalem (South) (AC 90) · Vijay Tamilan Parthiban A. · TVKVeerapandi (AC 91) · Palanivel M.S. · TVKRasipuram (SC) (AC 92) · Logesh Tamilselvan D. · TVKSenthamangalam(ST) (AC 93) · P. Chandrasekar · TVKNamakkal (AC 94) · Dilip C.S. · TVKParamathi-Velur (AC 95) · Sekar S. · AIADMKTiruchengodu (AC 96) · Arunraj K.G. · TVKKumarapalayam (AC 97) · C. Vijayalakshmi · TVKErode (East) (AC 98) · M. Vijay Balaji · TVKErode (West) (AC 99) · Ananth Moghan K.K. · TVKModakkurichi (AC 100) · D. Shanmugan · TVKDharapuram (SC) (AC 101) · Sathyabama P. · AIADMKKangayam (AC 102) · NSN Nataraj · AIADMKPerundurai (AC 103) · Jayakumar S. · AIADMKBhavani (AC 104) · Karuppanan K.C. · AIADMKAnthiyur (AC 105) · Haribaskar P. · AIADMKGobichettipalayam (AC 106) · Sengottaiyan K.A. · TVKBhavanisagar (AC 107) · V.P. Tamilselvi · TVKUdhagamandalam (AC 108) · Bhojarajan M. · BJPGudalur (SC) (AC 109) · Dhravidamani M. · DMKCoonoor (AC 110) · M. Raju · DMKMettuppalayam (AC 111) · Sunilanand · TVKAvanashi (SC) (AC 112) · Kamali S. · TVKTiruppur (North) (AC 113) · V. Sathyabama · TVKTiruppur (South) (AC 114) · Balamurugan S. · TVKPalladam (AC 115) · K. Ramkumar · TVKSulur (AC 116) · NM. Sukumar · TVKKavundampalayam (AC 117) · Kanimozhi Santhosh · TVKCoimbatore(North) (AC 118) · V. Sampathkumar · TVKThondamuthur (AC 119) · S.P. Velumani · AIADMKCoimbatore(South) (AC 120) · V. Senthilbalaji · DMKSinganallur (AC 121) · K.S. Sri Giri Prasath · TVKKinathukadavu (AC 122) · Vignesh K. · TVKPollachi (AC 123) · K. Nithyanandhan · DMKValparai (SC) (AC 124) · Kutty (alias) Sudhakar A. · DMKUdumalaipettai (AC 125) · Jayakumar M. · DMKMadathukulam (AC 126) · R. Jayaramakrishnan · DMKPalani (AC 127) · Ravimanoharan K. · AIADMKOddanchatram (AC 128) · Sakkarapani R. · DMKAthoor (AC 129) · I. Periasamy · DMKNilakkottai (SC) (AC 130) · Ayyanar R. · TVKNatham (AC 131) · Natham Viswanathan R. · AIADMKDindigul (AC 132) · Senthilkumar I.P. · DMKVedasandur (AC 133) · Saminathan T. · DMKAravakurichi (AC 134) · Elango R. · DMKKarur (AC 135) · M.R. Vijayabhaskar · AIADMKKrishnarayapuram(SC) (AC 136) · Sathya M. · TVKKulithalai (AC 137) · Suriyanur A. Chandran · DMKManapparai (AC 138) · R. Kathiravan · TVKSrirangam (AC 139) · Ramesh · TVKTiruchirappalli (AC 140) · K.N. Nehru · DMKTiruchirappalli (AC 141) · C. Joseph Vijay · TVKThiruverumbur (AC 142) · Vijayakumar (A) Navalpattu S. Viji · TVKLalgudi (AC 143) · Leemarose Martin · AIADMKManachanallur (AC 144) · Kathiravan S. · DMKMusiri (AC 145) · M. Vignesh · TVKThuraiyur (SC) (AC 146) · Ravisankar M. · TVKPerambalur (SC) (AC 147) · Sivakumar K. · TVKKunnam (AC 148) · Sivasankar S.S. · DMKAriyalur (AC 149) · Rajendran S. · AIADMKJayankondam (AC 150) · Vaithilingam G. · PMKTittakudi (SC) (AC 151) · Ganesan C.V. · DMKVriddhachalam (AC 152) · Premalatha Vijayakanth · DMDKNeyveli (AC 153) · Rajendran R. · AIADMKPanruti (AC 154) · Mohan K. · AIADMKCuddalore (AC 155) · B. Rajkumar · TVKKurinjipadi (AC 156) · M.R.K. Panneerselvam · DMKBhuvanagiri (AC 157) · Arunmozhithevan A. · AIADMKChidambaram (AC 158) · Thamimun Ansari M. · DMKKattumannarkoil(SC) (AC 159) · L.E. Jothimani · VCKSirkazhi (SC) (AC 160) · Senthilselvan R. · DMKMayiladuthurai (AC 161) · Jamal Mohamed Younoos Y.N. · INCPoompuhar (AC 162) · Nivedha M. Murugan · DMKNagapattinam (AC 163) · M.H. Jawahirullah · DMKKilvelur (SC) (AC 164) · Latha T. · CPIMVedaranyam (AC 165) · Manian O.S. · AIADMKThiruthuraipoondi(SC) (AC 166) · Marimuthu K. · CPIMannargudi (AC 167) · Kamaraj S. · AMMKThiruvarur (AC 168) · Kalaivanan Poondi K. · DMKNannilam (AC 169) · Kamaraj R. · AIADMKThiruvidaimarudur (AC 170) · Govi. Chezhiaan · DMKKumbakonam (AC 171) · Vinoth · TVKPapanasam (AC 172) · A.M. Shahjahan · IUMLThiruvaiyaru (AC 173) · Durai Chandrasekaran · DMKThanjavur (AC 174) · R. Vijaysaravanan · TVKOrathanadu (AC 175) · R. Vaithilingam · DMKPattukkottai (AC 176) · Annadurai K. · DMKPeravurani (AC 177) · Ashokkumar N. · DMKGandharvakottai(SC) (AC 178) · N. Subramanian · TVKViralimalai (AC 179) · Vijayabaskar C. · AIADMKPudukkottai (AC 180) · V. Muthuraja · DMKThirumayam (AC 181) · Regupathy S. · DMKAlangudi (AC 182) · Siva V. Meyyanathan · DMKAranthangi (AC 183) · Mohamed Farvas J. · TVKKaraikudi (AC 184) · Dr. Prabhu T.K. · TVKTiruppattur (AC 185) · Seenivasa Sethupathy R. · TVKSivaganga (AC 186) · Kulanthai Rani A. · TVKManamadurai(SC) (AC 187) · Elangovan D. · TVKMelur (AC 188) · P. Viswanathan · INCMadurai East (AC 189) · Karthikeyan S. · TVKSholavandan(SC) (AC 190) · Karuppaiah M.V. · TVKMadurai North (AC 191) · A. Kallanai · TVKMadurai South (AC 192) · M.M. Gopison · TVKMadurai Central (AC 193) · Madhar Badhurudeen · TVKMadurai West (AC 194) · Thangapandi S.R. · TVKThiruparankundram (AC 195) · Nirmalkumar R. · TVKThirumangalam (AC 196) · Manimaran M. · DMKUsilampatti (AC 197) · Vijay M. · TVKAndipatti (AC 198) · Maharajan A. · DMKPeriyakulam (AC 199) · Sabari Iyngaran G. · TVKBodinayakanur (AC 200) · O. Panneerselvam · DMKCumbum (AC 201) · Jeganathmishra PLA · TVKRajapalayam (AC 202) · Jegadeshwari K. · TVKSrivilliputhur(SC) (AC 203) · Karthik A. · TVKSattur (AC 204) · Kadarkarairaj A. · DMKSivakasi (AC 205) · Keerthana S. · TVKVirudhunagar (AC 206) · Selvam P. · TVKAruppukkottai (AC 207) · Ramachandran K.K.S.S.R. · DMKTiruchuli (AC 208) · Thangam Thenarasu · DMKParamakudi (SC) (AC 209) · Advocate Kathiravan K.K. · DMKTiruvadanai (AC 210) · Rajeev · TVKRamanathapuram (AC 211) · Katharbatcha Muthuramalingam · DMKMudhukulathur (AC 212) · R.S. Rajakannappan · DMKVilathikulam (AC 213) · Markandayan G.V. · DMKThoothukkudi (AC 214) · Srinath · TVKTiruchendur (AC 215) · Anitha R. Radhakrishnan · DMKSrivaikuntam (AC 216) · Saravanan G. · TVKOttapidaram(SC) (AC 217) · P. Mathanraja · TVKKovilpatti (AC 218) · Karunanithi K. · DMKSankarankovil(SC) (AC 219) · Dr. Dhilipan Jaishankar · AIADMKVasudevanallur(SC) (AC 220) · E. Raja · DMKKadayanallur (AC 221) · Rajendran T.M. · DMKTenkasi (AC 222) · Dr. Kalai Kathiravan · DMKAlangulam (AC 223) · Paul Manoj Pandian · DMKTirunelveli (AC 224) · Murughan R.S. · TVKAmbasamudram (AC 225) · Dr. Esakki Subaya · AIADMKPalayamkottai (AC 226) · M. Abdul Wahab · DMKNanguneri (AC 227) · Reddiarpatti V. Narayanan · TVKRadhapuram (AC 228) · Dr. Sathish Christopher · TVKKanniyakumari (AC 229) · Thalavai Sundaram N. · AIADMKNagercoil (AC 230) · Austin · DMKColachel (AC 231) · Tharahai Cuthbert · INCPadmanabhapuram (AC 232) · Chellaswamy R. · CPIMVilavancode (AC 233) · Praveen T.T. · INCKilliyoor (AC 234) · Rajesh Kumar S. · INC
TVK(108)
DMK(59)
AIADMK(47)
INC(5)
PMK(4)
IUML(2)
AC 19 · Tamil Nadu

Chepauk-Thiruvalliken

2026 WinnerDMK
Udhayanidhi Stalin
Victory Margin
—
—
Voter Turnout
—
—
Explore Polling Stations for Chepauk-ThiruvallikenCompare this Seat Side-by-Side
Tooling & Models

Analytical Workspaces & Explorers

5 Dedicated Analytic Workspaces

Statewide Voter Patterns

Interactive multi-metric explorer: turnout curves, winning margins, party lead counts, and top-two vote concentration across all 234 seats.

Constituency Comparator

Side-by-side electoral benchmarking: compare outcome KPIs, station-level median margins, competitiveness gauges, and locality clusters.

Polling Booths Directory

Search 62,129 polling stations across Tamil Nadu by school name, street address, or locality cluster.

Methodology & Data Integrity

Mathematical formulations, Form 20 reconciliation rules, clustering tiers, and strict ecological fallacy guardrails.

Village Election Analytics

Explore derived village aggregates with district, constituency, party, margin, vote, and station summaries.

Records & Superlatives

Definitive benchmarks: 10 closest finishes, landslides, turnout peaks, declared assets, and affidavit cases.

Hyperlocal Provenance

Form 20 Verified Key Constituencies

13 Featured Across 5 Zones
ChennaiForm 20
Chepauk-Thiruvallikeni
Lead: DMK+27.0 pp
ChennaiForm 20
Kolathur
Lead: TVK+4.0 pp
ChennaiForm 20
Mylapore
Lead: TVK+12.0 pp
NorthForm 20
Kancheepuram
Lead: TVK+11.0 pp
NorthForm 20
Katpadi
Lead: TVK+3.0 pp
WestForm 20
Edappadi
Lead: AIADMK+48.0 pp
WestForm 20
Coimbatore (South)
Lead: DMK+4.0 pp
WestForm 20
Gobichettipalayam
Lead: TVK+14.0 pp
CentralForm 20
Tiruchirappalli (West)
Lead: DMK+17.0 pp
CentralForm 20
Thanjavur
Lead: TVK+12.0 pp
SouthForm 20
Madurai North
Lead: TVK+14.0 pp
SouthForm 20
Tirunelveli
Lead: TVK+7.0 pp
SouthForm 20
Kanniyakumari
Lead: AIADMK+1.0 pp
Methodology FAQ

Frequently Asked Questions

How are the seat turnover and realignment figures computed?▼

We compare winning candidates and party affiliations across each of Tamil Nadu's 234 assembly constituencies between the official 2021 and 2026 ECI Form 20 declarations.

What qualifies as a "Photo Finish" contest?▼

Races where the victory margin between the winner and runner-up is fewer than 1,000 votes, including recounts and postal ballot margins.

What is the third-party spoiler threshold?▼

A constituency is categorized as a decisive vote split when the total valid votes secured by the 3rd place party exceed the winning margin between 1st and 2nd place.