Constituency-by-constituency results across four Tamil Nadu Legislative Assembly elections — 2026, 2021, 2016 and 2011 — with party seat trends, swing analysis and a year-by-year head-to-head comparison tool.
| Party | 2026 | 2021 | 2016 | 2011 |
|---|---|---|---|---|
| AIADMK | 41 | 66 | 134 | 150 |
| DMK | 59 | 133 | 89 | 23 |
| INC | 5 | 18 | 8 | 5 |
| PMK | 4 | 5 | — | 3 |
| TVK | 107 | — | — | — |
| Others / Independents | 11 | 12 | 1 | 53 |
| Vacant (resigned/deceased) | 7 | — | — | — |
Note: 2026 is shown as all 234 constituencies; 7 seats are currently vacant (member resigned or deceased since the 2026 result), so only 227 are held by a sitting MLA today — those 7 are excluded from the 2026 party tally above. TVK did not contest as a distinct party before 2026. AIADMK/ADMK and INC/CONG are merged across years for a consistent comparison.
Constituency-level records (crowding, electorate size, turnout, NOTA) are drawn from the three CSV-sourced years (2021, 2016, 2011) — the current 2026 Assembly isn't included in these specific comparisons since per-constituency candidate/elector detail isn't part of its dataset.