20. TRIVANDRUM
Total Votes: 714687
Votes Polled: 453458
Invalid Votes: 3872
| Name of the Candidate | Party | Votes | Percentage |
| A. NEELALOHITADASAN NADAR | INCI | 273818 | 60.90 |
| M. N. GOVINDAN NAIR | CPI | 166761 | 37.09 |
| G. P. NAIR | IND | 2734 | 0.61 |
| V. M. BALAJI | IND | 1709 | 0.38 |
| V. S. VELAYUDHAN NAIR | IND | 1377 | 0.31 |
| SIVADASAN ACHARI | IND | 1102 | 0.25 |
| V. HAREENDRAN NAIR | IND | 1085 | 0.24 |
| Y. ALPHONSE | IND | 1000 | 0.22 |
| Total | 449586 | 100.00 | |
Mr. A. NEELALOHITADASAN NADAR (INCI) elected with a margin of 107057 votes.