RSP
The table below lists Revolutionary Socialist Party (RSP) candidates, their total votes, vote share and final position in Quilon Lok Sabha Constituency in Kerala.
| Election year | Candidate Name | Votes Received | Vote Share (%) | Position | Status |
|---|---|---|---|---|---|
| 1998 | N.K. Premachandran | 396,145 | 52.11 | 1 | Won |
| 1996 | N.K.Premachandran | 359,786 | 49.78 | 1 | Won |
| 1991 | R.S. Unni | 342,796 | 46.63 | 2 | Lost |
| 1989 | Bagu Divakaran | 359,393 | 46.7 | 2 | Lost |
| 1980 | N. Sreekantan Nair | 185,562 | 44.46 | 2 | Lost |
| 1977 | N. Sreekantan Nair | 272,378 | 60.86 | 1 | Won |
| 1971 | N. Sreekantan Nair | 206,309 | 66.11 | 1 | Won |
| 1962 | Sreekantan Nair | 199,377 | 59.73 | 1 | Won |
| 1957 | Chandrasekharan (S. C. ) | 171,946 | 14.28 | 4 | Lost |