Official results for the 1989 Sikkim Legislative Assembly election. SSP won the most seats with 32 out of 32.
Total seats: 32. Majority mark: 16.
| Party | Seats | Vote Share |
|---|---|---|
| SSP | 32 | 70.4% |
| INC | 0 | 18.1% |
| RIS | 0 | 8.6% |
| DPC | 0 | 0.2% |
| IND | 0 | 2.7% |
| Constituency | Winner | Party | Margin % |
|---|---|---|---|
| ARITHANG | PHUCHUNG BHUTIA | SSP | 35.2% |
| BARFUNG | PADAM BAHADUR GURUNG | SSP | 58.0% |
| CHUJACHEN | RAM LEPCHA | SSP | 39.8% |
| DARAMDIN | CHONG LAMU BHUTIA | SSP | 45.8% |
| DJONGU | DORJEE TSHERING | SSP | 26.9% |
| GANGTOK | CHAMLA TSHERING | SSP | 21.3% |
| GNATHANG-MACHONG | RUP RAJ RAI | SSP | 8.2% |
| GYALSHING-BARNYAK | PADAM LALL GURUNG | SSP | 60.6% |
| KABI LUNGCHUK | SONAM DUPDEN LEPCHA | SSP | 30.7% |
| KHAMDONG-SINGTAM | SUKUMAR PRADHAN | SSP | 25.1% |
| LACHEN MANGAN | MANITA PRADHAN | SSP | 15.2% |
| MANEYBUNG-DENTAM | MAN BAHADUR DAHAL | SSP | 51.1% |
| MARTAM-RUMTEK | TASA TENGEY LEPCHA | SSP | 39.4% |
| MELLI | BEDU SINGH PANTH | SSP | 81.6% |
| NAMCHEYBUNG | BIRKHA MAN RAMUDAMU | SSP | 50.4% |
| NAMCHI-SINGHITHANG | SONAM GYATSO KALEON | SSP | 80.7% |
| NAMTHANG-RATEYPANI | PAWAN CHAMLING | SSP | 88.5% |
| POKLOK-KAMRANG | BHOJ RAJ RAI | SSP | 56.0% |
| RANGANG-YANGANG | CHANDRA KUMAR MOHORA | SSP | 61.9% |
| RHENOCK | RAJENDRA PRASAD UPRETY | SSP | 21.4% |
| RINCHENPONG | BIR BAL SUBBA | SSP | 42.8% |
| SALGHARI-ZOO | NAR BAHADUR BHANDARI | SSP | 83.8% |
| SANGHA | NANJHA GYALTSEN | SSP | 26.1% |
| SHYARI | SONAM CHYODA LEPCHA | SSP | 47.5% |
| SOREONG-CHAKUNG | TARA MAN RAI | SSP | 71.2% |
| TEMI-NAMPHING | DILLIRAM BASNET | SSP | 61.7% |
| TUMEN-LINGI | I. B. RAI | SSP | 57.9% |
| UPPER BURTUK | O.T.BHUTIA | SSP | 36.5% |
| UPPER TADONG | HANGU TSHERING BHUTIA | SSP | 17.3% |
| WEST PENDA | KHARANANDA UPRETI | SSP | 26.9% |
| YANGTHANG | UGEN PRITSO BHUTIA | SSP | 79.5% |
| YOKSAM-TASHIDING | SANCHAMAN SUBBA | SSP | 24.7% |