# Radhakrishnan Nagar Assembly constituency

Radhakrishnan Nagar (Dr. Radhakrishnan Nagar) or R. K. Nagar, is a legislative assembly constituency in the Indian state of Tamil Nadu. Its State Assembly Constituency number is 11. It is part of Chennai North Lok Sabha constituency. It is one of the 234 State Legislative Assembly Constituencies in Tamil Nadu, in India.

## Members of the Legislative Assembly

| Assembly | Duration | Winner | Party |
| Sixth | 1977–80 | Isari Velan | All India Anna Dravida Munnetra Kazhagam |
| Seventh | 1980–84 | V. Rajasekaran | Indian National Congress (I) |
| Eighth | 1984–89 | S. Venugopal | Indian National Congress |
| Ninth | 1989–91 | S. P. Sarkunam | Dravida Munnetra Kazhagam |
| Tenth | 1991–96 | E. Madhusudhnan | All India Anna Dravida Munnetra Kazhagam |
| Eleventh | 1996-01 | S. P. Sarkunam | Dravida Munnetra Kazhagam |
| Twelfth | 2001–06 | P. K. Sekar Babu | All India Anna Dravida Munnetra Kazhagam |
| Thirteenth | 2006–11 | P. K. Sekar Babu | All India Anna Dravida Munnetra Kazhagam |
| Fourteenth | 2011–15 | P. Vetrivel | All India Anna Dravida Munnetra Kazhagam |
| Fourteenth | 2015–16^ | J. Jayalalithaa | All India Anna Dravida Munnetra Kazhagam |
| Fifteenth | 2016-16 | J. Jayalalithaa | All India Anna Dravida Munnetra Kazhagam |
| Fifteenth | 2017–21^ | T. T. V. Dhinakaran | Independent |
| Sixteenth | 2021–present | J. John Ebenezer | Dravida Munnetra Kazhagam |
^by-election

## Election results

Vote share of winning candidates :
| 2021 | 2021 | 51.67% | 51.67% |
| 2017 by-election | 2017 by-election | 50.32% | 50.32% |
| 2016 | 2016 | 55.87% | 55.87% |
| 2015 by-election | 2015 by-election | 88.43% | 88.43% |
| 2011 | 2011 | 59.04% | 59.04% |
| 2006 | 2006 | 50.36% | 50.36% |
| 2001 | 2001 | 58.43% | 58.43% |
| 1996 | 1996 | 62.12% | 62.12% |
| 1991 | 1991 | 60.30% | 60.30% |
| 1989 | 1989 | 45.31% | 45.31% |
| 1984 | 1984 | 50.71% | 50.71% |
| 1980 | 1980 | 48.62% | 48.62% |
| 1977 | 1977 | 35.57% | 35.57% |

### 2021

2021 Tamil Nadu Legislative Assembly election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | DMK | J. John Ebenezer | 95,763 | 51.2 | +37.26 |
| | AIADMK | R. S. Raajesh | 53,284 | 28.49 | +1.18 |
| | NTK | K. Gowrishankar | 20,437 | 10.93 | +8.78 |
| | MNM | Fazil. A | 11,198 | 5.99 | +5.99 |
| | AMMK | Dr. P. Kalidas | 1,852 | 0.99 | −49.33 |
| Margin of victory | Margin of victory | Margin of victory | 42,479 | 22.92% | 0.20% |
| Turnout | Turnout | Turnout | 185,323 | 70.47% | 2.11% |
| Rejected ballots | Rejected ballots | Rejected ballots | 291 | 0.16% | |
| Registered electors | Registered electors | Registered electors | 262,980 | | |
| | DMK gain from AMMK | DMK gain from AMMK | Swing | -4.19% | |

### 2017 by-election

2017 Tamil Nadu Legislative Assembly By-election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | Independent | T. T. V. Dhinakaran | 89,013 | 50.32 | N/A |
| | AIADMK | E. Madhusudhnan | 48,306 | 27.31 | −28.56 |
| | DMK | N. Marudhu Ganesh | 24,651 | 13.94 | −19.2 |
| | NTK | Kalaikottuthayam | 3,802 | 2.15 | N/A |
| | None of the Above | NOTA | 2,373 | 1.34 | −0.31 |
| Margin of victory | Margin of victory | Margin of victory | 40,707 | 23.01 | +0.28 |
| Turnout | Turnout | Turnout | 1,76,890 | 77.68 | +9.32 |
| | Independent gain from AIADMK | Independent gain from AIADMK | Swing | | |

### 2016

2016 Tamil Nadu Legislative Assembly election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | AIADMK | J. Jayalalithaa | 97,218 | 55.87 | −32.56 |
| | DMK | Shimla Muthuchozhan | 57,673 | 33.14 | +33.14 |
| | VCK | V. Vasanthi Devi | 4,195 | 2.41 | +2.41 |
| | PMK | F. Agnes | 3,011 | 1.73 | +1.73 |
| | BJP | M. N. Raja | 2,928 | 1.68 | +1.68 |
| | NOTA | None of the Above | 2,873 | 1.65 | +0.35 |
| Margin of victory | Margin of victory | Margin of victory | 39,545 | 22.73 | −60.36 |
| Turnout | Turnout | Turnout | 1,74,015 | 68.36 | −6.22 |
| | AIADMK hold | AIADMK hold | Swing | -32.57 | |

### 2015 by-election

2015 By-election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | AIADMK | J. Jayalalithaa | 1,60,432 | 88.43 | +29.41 |
| | CPI | C. Mahendran | 9,710 | 5.35 | +5.35 |
| | Independent | K. R. Ramaswamy | 4,590 | 2.53 | +2.53 |
| | PPI(S) | R. Rajamohan Abraham | 746 | 0.41 | +0.41 |
| | Independent | P. Ponraj | 537 | 0.29 | +0.29 |
| | NOTA | None of the Above | 2,376 | 1.30 | +1.30 |
| Margin of victory | Margin of victory | Margin of victory | 1,50,722 | 83.08 | +61.06 |
| Turnout | Turnout | Turnout | 1,81,420 | 74.58 | −2.10 |
| | AIADMK hold | AIADMK hold | Swing | +29.41 | |

### 2011

2011 Tamil Nadu Legislative Assembly election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | AIADMK | P. Vetrivel | 83,777 | 59.04% | +8.68 |
| | DMK | P. K. Sekar Babu | 52,522 | 37.01% | New |
| | BJP | K. R. Vinayagam | 1,300 | 0.92% | −0.19 |
| Margin of victory | Margin of victory | Margin of victory | 31,255 | 22.03% | 11.26% |
| Turnout | Turnout | Turnout | 141,904 | 72.70% | 2.62% |
| Registered electors | Registered electors | Registered electors | 195,179 | | |
| | AIADMK hold | AIADMK hold | Swing | 8.68% | |

### 2006

2006 Tamil Nadu Legislative Assembly election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | AIADMK | P. K. Sekar Babu | 84,462 | 50.36% | −8.07 |
| | INC | R. Manohar | 66,399 | 39.59% | New |
| | DMDK | P. Mohamed Jan | 11,716 | 6.99% | New |
| | BJP | K. P. Prem Ananth | 1,858 | 1.11% | New |
| | Independent | K. Rajendran | 1,030 | 0.61% | New |
| Margin of victory | Margin of victory | Margin of victory | 18,063 | 10.77% | −10.55% |
| Turnout | Turnout | Turnout | 167,730 | 70.08% | 23.08% |
| Registered electors | Registered electors | Registered electors | 239,326 | | |
| | AIADMK hold | AIADMK hold | Swing | -8.07% | |

### 2001

2001 Tamil Nadu Legislative Assembly election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | AIADMK | P. K. Sekar Babu | 74,888 | 58.43% | +31.93 |
| | DMK | S. P. Sarguna Pandian | 47,556 | 37.10% | −25.02 |
| | MDMK | N. Manogaran | 3,621 | 2.83% | −5.27 |
| | Independent | K. Manikandan | 669 | 0.52% | New |
| Margin of victory | Margin of victory | Margin of victory | 27,332 | 21.32% | −14.30% |
| Turnout | Turnout | Turnout | 128,175 | 47.01% | −9.44% |
| Registered electors | Registered electors | Registered electors | 272,666 | | |
| | AIADMK gain from DMK | AIADMK gain from DMK | Swing | -3.70% | |

### 1996

1996 Tamil Nadu Legislative Assembly election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | DMK | S. P. Sarguna Pandian | 75,125 | 62.12% | New |
| | AIADMK | R. M. D. Raveendran | 32,044 | 26.50% | −33.8 |
| | MDMK | G. V. Siva | 9,788 | 8.09% | New |
| | AIIC(T) | M. Panneerselvam | 1,369 | 1.13% | New |
| | BJP | T. A. G. Parthiban | 1,149 | 0.95% | +0.38 |
| Margin of victory | Margin of victory | Margin of victory | 43,081 | 35.63% | 13.07% |
| Turnout | Turnout | Turnout | 120,928 | 56.45% | −0.41% |
| Registered electors | Registered electors | Registered electors | 220,586 | | |
| | DMK gain from AIADMK | DMK gain from AIADMK | Swing | 1.83% | |

### 1991

1991 Tamil Nadu Legislative Assembly election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | AIADMK | E. Madhusudhanan | 66,710 | 60.30% | +35.26 |
| | JD | V. Rajasekaran | 41,758 | 37.74% | New |
| | IUML | A. M. Gulam Huseien | 941 | 0.85% | New |
| | BJP | V. R. Jaganathan | 636 | 0.57% | New |
| Margin of victory | Margin of victory | Margin of victory | 24,952 | 22.55% | 2.28% |
| Turnout | Turnout | Turnout | 110,639 | 56.86% | −10.73% |
| Registered electors | Registered electors | Registered electors | 199,052 | | |
| | AIADMK gain from DMK | AIADMK gain from DMK | Swing | 14.99% | |

### 1989

1989 Tamil Nadu Legislative Assembly election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | DMK | S. P. Sarguna Pandian | 54,216 | 45.31% | −1.81 |
| | AIADMK | E. Madhusudhanan | 29,960 | 25.04% | New |
| | Independent | V. Rajasekaran | 20,731 | 17.32% | New |
| | INC | Venugopal | 12,863 | 10.75% | −39.96 |
| Margin of victory | Margin of victory | Margin of victory | 24,256 | 20.27% | 16.68% |
| Turnout | Turnout | Turnout | 119,660 | 67.59% | 0.58% |
| Registered electors | Registered electors | Registered electors | 179,625 | | |
| | DMK gain from INC | DMK gain from INC | Swing | -5.40% | |

### 1984

1984 Tamil Nadu Legislative Assembly election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | INC | S. Venugopal | 54,334 | 50.71% | +2.09 |
| | DMK | S. P. Sarguna Pandian | 50,483 | 47.12% | New |
| Margin of victory | Margin of victory | Margin of victory | 3,851 | 3.59% | −4.34% |
| Turnout | Turnout | Turnout | 107,147 | 67.01% | 4.65% |
| Registered electors | Registered electors | Registered electors | 162,902 | | |
| | INC hold | INC hold | Swing | 2.09% | |

### 1980

1980 Tamil Nadu Legislative Assembly election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | INC | V. Rajasekaran | 44,076 | 48.62% | +36.26 |
| | AIADMK | Isari Velan | 36,888 | 40.69% | +5.12 |
| | JP | K. Arumugasamy | 8,685 | 9.58% | New |
| Margin of victory | Margin of victory | Margin of victory | 7,188 | 7.93% | 6.07% |
| Turnout | Turnout | Turnout | 90,648 | 62.36% | 17.19% |
| Registered electors | Registered electors | Registered electors | 146,769 | | |
| | INC gain from AIADMK | INC gain from AIADMK | Swing | 13.05% | |

### 1977

1977 Tamil Nadu Legislative Assembly election: Dr. Radhakrishnan Nagar :
| Party | Party | Candidate | Votes | % | ±% |
| | AIADMK | Isari Velan | 28,416 | 35.57% | New |
| | DMK | R. D. Seethapathy | 26,928 | 33.71% | New |
| | JP | K. Arumugaswamy | 14,449 | 18.09% | New |
| | INC | T. N. Anandanayaki | 9,876 | 12.36% | New |
| Margin of victory | Margin of victory | Margin of victory | 1,488 | 1.86% | |
| Turnout | Turnout | Turnout | 79,881 | 45.17% | |
| Registered electors | Registered electors | Registered electors | 178,751 | | |
| | AIADMK win (new seat) | AIADMK win (new seat) | AIADMK win (new seat) | AIADMK win (new seat) | AIADMK win (new seat) |