| Date | Month | Year | Chief Minister | Party |
|---|---|---|---|---|
| 27th | May | 2016 | Mamata Banerjee | All India Trinamool Congress |
| 20th | May | 2011 | Mamata Banerjee | All India Trinamool Congress |
| 18th | May | 2006 | Buddhadeb Bhattacharya | Communist Party (Marxist) |
| 15th | May | 2001 | Buddhadeb Bhattacharya | Communist Party (Marxist) |
| 6th | November | 2000 | Buddhadeb Bhattacharya | Communist Party (Marxist) |
| 16th | May | 1996 | Jyoti Basu | Communist Party (Marxist) |
| 19th | June | 1991 | Jyoti Basu | Communist Party (Marxist) |
| 30th | March | 1987 | Jyoti Basu | Communist Party (Marxist) |
| 24th | May | 1982 | Jyoti Basu | Communist Party (Marxist) |
| 21st | June | 1977 | Jyoti Basu | Communist Party (Marxist) |
| 19th | March | 1972 | Siddhartha Shankar Ray | Congress |
| 28th | June | 1971 | President's Rule | |
| 2nd | April | 1971 | P.C.Ghosh | Progressive Democratic Front |
| 19th | March | 1970 | President's Rule | |
| 25th | February | 1969 | A.K.Mukherjee | Bangla Congress |
| 20th | February | 1968 | President's Rule | |
| 2nd | November | 1967 | P.C.Ghosh | Progressive Democratic Front |
| 15th | March | 1967 | A.K.Mukherjee | Bangla Congress |
| 8th | July | 1962 | P.C.Sen | Congress |
| 1st | July | 1962 | President's rule | |
| 14th | January | 1948 | Bidhan Chandra Roy | Congress |
| 15th | August | 1947 | P.C.Ghosh | Congress |
| Date | Month | Year | Name | Party |
|---|---|---|---|---|
| 24th | May | 2016 | Sarbananda Sonowal | Bharatiya Janata Party |
| 18th | May | 2011 | Tarun Gogoi | Congress |
| 14th | May | 2006 | Tarun Gogoi | Congress |
| 17th | May | 2001 | Tarun Gogoi | Congress |
| 15th | May | 1996 | Prafulla Mahanta | Asom Gana Parishad |
| 22nd | April | 1996 | Bhumidhar Burman | Congress |
| 30th | June | 1991 | Hiteshwar Saikia | Congress |
| 28th | November | 1990 | President's Rule | |
| 24th | December | 1985 | Prafulla Mahanta | Asom Gana Parishad |
| 27th | February | 1983 | Hiteshwar Saikia | Congress |
| 19th | March | 1982 | President's Rule | |
| 13th | January | 1982 | Kesab Chandra Gogoi | Congress |
| 30th | June | 1981 | President's Rule | |
| 6th | December | 1980 | Syeda Anwara Taimur | Congress |
| 12th | December | 1979 | President's Rule | |
| 9th | September | 1979 | J.N.Hazarika | Congress |
| 12th | March | 1978 | Gopala Borbora | Janata Party |
| 31st | January | 1972 | Sarat Chandra Sinha | Congress |
| 11th | November | 1970 | M.M.Choudhary | Congress |
| 28th | December | 1957 | Bimala Prasad Chaliha | Congress |
| 9th | August | 1950 | Bishnu Ram Medhi | Congress |
| 11th | February | 1946 | Gopinath Bardoloi | Congress |
| Date | Month | Year | CM Name | CM Party |
|---|---|---|---|---|
| 25th | May | 2016 | Pinarayi Vijayan | Communist Party of India (Marxist) |
| 18th | May | 2011 | Oommen Chandy | Congress |
| 18th | May | 2006 | V.S. Achuthanandan | CPI(M) |
| 31st | August | 2004 | Oommen Chandy | Congress |
| 17th | May | 2001 | A. K. Antony | Congress |
| 20th | May | 1996 | E.K.Nayanar | CPI(M) |
| 22nd | March | 1995 | A. K. Antony | Congress |
| 24th | June | 1991 | K Karunakaran | Congress |
| 26th | March | 1987 | E.K.Nayanar | CPI(M) |
| 24th | May | 1982 | K.Karunakaran | Congress |
| March | 1982 | President's Rule | ||
| 28th | December | 1981 | K.Karunakaran | Congress |
| October | 1981 | President's Rule | ||
| 25th | January | 1980 | E.K.Nayanar | CPI(M) |
| 1st | December | 1979 | President's Rule | |
| 12th | October | 1979 | C.H.Mohammed Koya | Indian Union Muslim League |
| 29th | October | 1978 | P.K.Vasudevan Nair | Communist Party of India |
| 27th | April | 1977 | A. K. Antony | Congress |
| 25th | March | 1977 | K.Karunakaran | Congress |
| 4th | October | 1970 | C.Achutha Menon | Communist Party of India |
| 4th | August | 1970 | Presidents Rule | |
| 1st | November | 1969 | C.Achutha Menon | Communist Party of India |
| 6th | March | 1967 | E.M.S. Namboodiripad | Communist Party of India (M) |
| 10th | September | 1964 | Presidents Rule | |
| 26th | September | 1962 | R.Shankar | Congress |
| 22nd | February | 1960 | Pattom Thanu Pillai | Praja Socialist Party |
| 13th | July | 1959 | Presidents Rule | |
| 5th | April | 1957 | E.M.S. Namboodiripad | Communist Party of India |
| Date | Month | Year | Name | Party |
|---|---|---|---|---|
| 16th | Feb | 2017 | Edappadi K Palaniswami | All India Anna Dravida Munnetra Kazhagam |
| 6th | December | 2016 | O Panneerselvam | All India Anna Dravida Munnetra Kazhagam |
| 23rd | May | 2016 | Jayalalithaa | All India Anna Dravida Munnetra Kazhagam |
| 23rd | May | 2015 | Jayalalithaa | All India Anna Dravida Munnetra Kazhagam |
| 29th | September | 2014 | O Panneerselvam | All India Anna Dravida Munnetra Kazhagam |
| 16th | May | 2011 | Jayalalithaa | All India Anna Dravida Munnetra Kazhagam |
| 12th | May | 2006 | M. Karunanidhi | Dravida Munnetra Kazhagam |
| 2nd | March | 2002 | Jayalalithaa | All India Anna Dravida Munnetra Kazhagam |
| 21st | September | 2001 | O. Panneerselvam | All India Anna Dravida Munnetra Kazhagam |
| 14th | May | 2001 | Jayalalithaa | All India Anna Dravida Munnetra Kazhagam |
| 13th | May | 1996 | M. Karunanidhi | Dravida Munnetra Kazhagam |
| 24th | June | 1991 | Jayalalithaa | All India Anna Dravida Munnetra Kazhagam |
| 30th | January | 1991 | President's Rule | |
| 27th | January | 1989 | M.Karunanidhi | Dravida Munnetra Kazhagam |
| 7th | January | 1988 | Janaki Ramachandran | ADMK Janaki Ramachandran Group |
| January | 1988 | President's Rule | ||
| 24th | December | 1987 | V.R. Nedunchezhian | All India Anna Dravida Munnetra Kazhagam |
| 10th | February | 1985 | M.G.Ramachandran | All India Anna Dravida Munnetra Kazhagam |
| 9th | June | 1980 | M.G.Ramachandran | All India Anna Dravida Munnetra Kazhagam |
| 17th | February | 1980 | President's Rule | |
| 30th | June | 1977 | M.G.Ramachandran | All India Anna Dravida Munnetra Kazhagam |
| February | 1976 | President's Rule | ||
| 15th | March | 1971 | M.Karunanidhi | Dravida Munnetra Kazhagam |
| 10th | February | 1969 | M.Karunanidhi | Dravida Munnetra Kazhagam |
| February | 1968 | V.R. Nedunchezhian | Dravida Munnetra Kazhagam | |
| 6th | March | 1967 | C.N.Annadurai | Dravida Munnetra Kazhagam |
| 2nd | October | 1963 | M.Bhaktavatsalam | Congress |
| 13th | April | 1954 | K.Kamaraj | Congress |
| 10th | April | 1952 | C.Rajagopalachari | Congress |
| 6th | April | 1949 | P.S.Kumaraswami Raja | Congress |
| 23rd | March | 1947 | O.P. Ramaswamy Reddiyar | Congress |
| Date | Month | Year | CM Name | CM Party |
|---|---|---|---|---|
| 6th | June | 2016 | V.Narayanasamy | Indian National Congress |
| 16th | May | 2011 | N Rangaswamy | All India NR Congress |
| 13th | May | 2006 | N Rangaswamy | Congress |
| 27th | October | 2001 | N Rangaswamy | Congress |
| 19th | May | 2001 | P Shanmugham | Congress |
| 22nd | March | 2000 | P Shanmugham | Congress |
| 27th | May | 1996 | R.V. Janakiraman | DMK |