| Chengalpattu Constituency |
| Chengalpattu Assembly Election Result 2021 | ||
| Candidate Names | Party | Votes |
| M. Gajendran | ADMK | 103561 |
| Varalakshmi Madusudanan | DMK (Won) | 129317 |
| A.Sathiskumar | AMMK | 3063 |
| S.Muthutamilselvan | IJK | 4133 |
| K. Sanjeevinadhan | NTK | 26813 |
| Chengalpattu Constituency Population - 2021 | |||
| Male | Female | Transgender | Total |
| 2,09,611 | 2,16,868 | 56 | 4,26,535 |
| Tamil Nadu Ministers List - 2021 |
| Full Details of Tamil Nadu Ministers 2021 |
| 2016 Election Result | ||
| Name | Party | Votes |
| R Kamalakannan | ADMK | 86383 |
| Varalakshmi.M | DMK(won) | 112675 |
| Murugesan.D | DMDK | 17438 |
| 2011 Election Result | ||
| Name | Party | Votes |
| D. Murugesan (Winner) | DMDK | 83,297 |
| V. G. Rangasamy (Runner UP) | PMK | 83,006 |
| Chengalpattu Constituency | ||
| MLA Name | Duration | Parties |
| C. G. Viswanathan | 1967 | DMK |
| P. G. Anoor Jegadeesan | 1971 | ADMK |
| P. G. Anoor Jegadeesan | 1977 | ADMK |
| P. G. Anoor Jegadeesan | 1980 | ADMK |
| V. Tamilmani | 1984 | ADMK |
| V. Tamilmani | 1989 | DMK |
| Vardarajan C.D. | 1991 | ADMK |
| Tamilmani, V. | 1996 | DMK |
| Arumugam K | 2001 | PMK |
| Arumugam K | 2006 | PMK |
| D. Murugesan | 2011 | DMDK |
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