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| # | Name | Took Office | Left Office | Party |
| 1 | Kazi Lhendup Dorjee | 16 May 1975 | 18 August 1979 | Indian National Congress |
| President's rule | 18 August 1979 | 18 October 1979 | ||
| 2 | Nar Bahadur Bhandari | 18 October 1979 | 11 May 1984 | Sikkim Janata Parishad |
| 3 | Bhim Bahadur Gurung | 11 May 1984 | 25 May 1984 | Indian National Congress |
| President's rule | 25 May 1984 | 8 March 1985 | ||
| 4 | Nar Bahadur Bhandari [2] | 8 March 1985 | 17 June 1994 | Sikkim Sangram Parishad |
| 5 | Sanchaman Limboo | 17 June 1994 | 12 December 1994 | Sikkim Sangram Parishad |
| 6 | Pawan Kumar Chamling | 12 December 1994 | present | Sikkim Democratic Front |
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