R. Vaithilingam of DMK won the Orathanadu Assembly constituency (Thanjavur district, Cauvery Delta) in the Tamil Nadu 2026 election, taking 44.42% of 195,304 votes cast. The winning margin over Dr. K. Arvind (TVK) was 35,028 votes, or 17.94 percentage points. The seat flipped from ADMK to DMK since 2021.
DMK
Winning party
44.42%
Winner vote share
35,028
Margin (17.94%)
ADMK → DMK
2021 → 2026 winner
Full candidate results, Orathanadu 2026
| # | Candidate | Party | Votes | Vote % |
|---|---|---|---|---|
| 1 | R. Vaithilingam Winner | DMK | 86,759 | 44.42% |
| 2 | Dr. K. Arvind 2nd | TVK | 51,731 | 26.49% |
| 3 | M. Sekar | ADMK | 44,260 | 22.66% |
| 4 | S.Thirumurugan | NTK | 10,135 | 5.19% |
| 5 | Nota | NOTA | 631 | 0.32% |
| 6 | M. Selvaraj | Party for the Rights of Other backward Classes | 548 | 0.28% |
| 7 | M. Kanagaraj | IND | 354 | 0.18% |
| 8 | C. Gunasekaran | Thamizh Desiya Munnetra Kazhagam | 352 | 0.18% |
| 9 | T. Vijayakumar | IND | 277 | 0.14% |
| 10 | A. Ajeshkannan | IND | 257 | 0.13% |
How Orathanadu compares to 2021
| Year | Winning candidate | Party | Vote share |
|---|---|---|---|
| 2021 | VAITHILINGAM, R. | ADMK | 46.95% |
| 2026 | R. VAITHILINGAM | DMK | 44.42% |
The seat changed hands, a swing of -2.53 percentage points in the winning vote share.
This page is part of the full Tamil Nadu 2026 election results set. Explore every seat, party efficiency, regional swing and demographics in the TN 2026 Explorer. For the wider story, see TVK’s debut mapped, the incumbents who lost, and how DMK collapsed.