15 elections on record · DMK dominant · 15 total
Nilakottai is an Assembly constituency in Tamil Nadu. It has participated in 15 elections from 1962 to 2026. DMK is the historically dominant party with 6 wins out of 15 elections.
| Year | Winner | Party | Votes | Vote % | Runner-up | Party | Margin |
|---|---|---|---|---|---|---|---|
| 2026 | R. Ayyanar | TVK | 68580 | 34.71% | S. Nagajothi | DMK | 2925 |
| 2021 | S. Thenmozhi | ADMK | 91461 | 49.49% | S. K. Murugavel Rajan | DMK | 27618 |
| 2016 | Thangathurai R | ADMK | 85507 | 48.99% | Anbazhagan M | DMK | 14776 |
| 2011 | Ramasamy A | PT | 75124 | 52.45% | Rajangam K. | INC | 24714 |
| 2006 | R. Sakkarapani | DMK | 63811 | 53.89% | K. P. Nallasamy | ADMK | 19903 |
| 2001 | Ara. Chakkarapani | DMK | 52896 | 46.40% | A.T. Sellasamy | AIADMK | 1369 |
| 1996 | R. Sakkarapani | DMK | 66379 | 58.57% | K. Sellamuthu | ADMK | 36823 |
| 1991 | A.T. Chellamuthu | ADMK | 72669 | 69.83% | T. Mohan | DMK | 42464 |
| 1989 | P. Kaliappan | DMK | 38540 | 35.81% | P. Balasubramani | ADK(J) | 5841 |
| 1984 | K. Kuppuswamy | AIADMK | 46466 | 49.86% | Chellamuthu K. | IND | 2481 |
| 1980 | K. Kuppuswamy | AIADMK | 35269 | 45.26% | Palaniswamy. S. K. | INC | 11387 |
| 1977 | A. P. Palaniappan | INC | 27000 | 37.09% | K. Kuppuswamy | AIADMK | 4581 |
| 1971 | P. T. R. Palanivel Rajan | DMK | 45785 | 64.01% | Ramasamy | INC | 20037 |
| 1967 | P. T. R. Palanivel Rajan | DMK | 42111 | 58.73% | M. Malaichami | INC | 12514 |
| 1962 | S. Sadasivam | INC | 28372 | 45.26% | C. Muthusami Gounder | SWA | 7290 |