20. TRIVANDRUM
Total Votes: 1112571
Votes Polled: 764317
Invalid Votes: 488
| Name of the Candidate | Party | Votes | Percentage |
| P. K. VASUDEVAN NAIR | CPI | 286057 | 37.45 |
| V. S. SIVAKUMAR | INC | 231454 | 30.30 |
| O. RAJAGOPAL | BJP | 228052 | 29.86 |
| K. S. RAJMOHAN | BSP | 3831 | 0.50 |
| G. MURALEEDHARAN NADAR | IND | 3037 | 0.40 |
| SELVARAJ | IND | 2480 | 0.32 |
| V. S. GIREESH KUMAR | ADMP | 2158 | 0.28 |
| B. K. RAJAGOPAL | IND | 1558 | 0.20 |
| BABINGTON | IND | 1350 | 0.18 |
| V. T. CHERIAN | IND | 1122 | 0.15 |
| FRANCIS ALBERT | IND | 873 | 0.11 |
| V. PRATHAP SINGH | IND | 617 | 0.08 |
| T. C. BALAKRISHNAN NAIR | IND | 534 | 0.07 |
| I. JUSTUS NADAR | IND | 382 | 0.05 |
| NOUSHAD | IND | 324 | 0.04 |
| Total | 763829 | 100.00 | |
Mr. P. K. VASUDEVAN NAIR (CPI) elected with a margin of 54603 votes.