| Year | Winner | Party | Votes | Vote % | Runner-up | Party | Margin |
|---|---|---|---|---|---|---|---|
| 2026 | Srinath | TVK | 100536 | 49.11% | Mahalingam P. | DMK | 8581 |
| 2021 | P. Geetha Jeevan | DMK | 92314 | 49.00% | S. D. R. Vijayaseelan | ADMK | 50310 |
| 2016 | Geetha Jeevan P | DMK | 88045 | 46.46% | Chellapandian S.T. | ADMK | 20908 |
| 2011 | Chellapandian S.T | AIADMK | 89010 | 56.78% | P. Geetha Jeevan | DMK | 26193 |
| 2006 | T. Sadhan Tirumalaikumar | MDMK | 45790 | 40.49% | R. Krishnan | CPI(M) | 6759 |
| 2001 | R. Easwaran | TMC(M) | 48019 | 47.05% | S. Thangapandian | PT | 11552 |
| 1996 | R. Eswaran | TMC | 32693 | 32.50% | P. Suresh Babu | INC | 616 |
| 1991 | R. Eswaran | INC | 54688 | 58.28% | R. Krishnan | CPI(M) | 20314 |
| 1989 | R. Eswaran | INC | 30805 | 32.15% | R. Krishnan | CPI(M) | 411 |
| 1984 | R. Eswaran | INC | 50303 | 62.34% | Periasamy. M. S. | CPI(M) | 22428 |
| 1980 | R. Krishnan | CPI(M) | 33107 | 50.51% | Eswaran. R. | INC | 3186 |
| 1977 | R. Krishnan | CPI(M) | 20092 | 33.25% | I. muthuraj | CPI | 4044 |
| 1971 | A. R. Subbiah Mudaliar | DMK | 37649 | 52.49% | Abdul Majid Sahib S. M. | INC | 3570 |
| 1967 | A. R. Subbiah Mudaliar | Independent | 36349 | 49.89% | S. M. A. Majid | INC | 446 |
| 1962 | — Pre-delimitation / data unavailable | ||||||
Joined TVK at formation on 2 February 2024.
Active TVK organiser in Thoothukudi constituency.
Announced as TVK candidate for Thoothukkudi (Thoothukudi).
Won Thoothukkudi constituency — part of TVK's south Tamil Nadu sweep.
Sworn in as Minister for Fisheries and Fishermen Welfare — key portfolio for Thoothukudi's coastal communities.