The resignation of Karnataka Chief Minister Siddaramaiah brings to a close the longest cumulative tenure served by any Chief Minister in the state's history.
After weeks of speculation over a change of guard, Siddaramaiah stepped down having served a total of eight years and 11 days across two stints in office.
He is only the third Chief Minister in Karnataka to complete a full five-year term and return to lead the state in a second, non-consecutive tenure.
His first term ran from 2013 to 2018; he was sworn in again in May 2023. On January 7, 2026, he eclipsed the record previously held by D. Devaraj Urs, the Congress party's social justice icon, who served across two terms from 1972 to 1977 and 1978 to 1980, for a total of seven years and 239 days.
Only three Chief Ministers since 1947 have completed an uninterrupted five-year term in office: S. Nijalingappa (Congress, 1962-1968), D. Devaraj Urs (Congress, 1972-1977) and Siddaramaiah (Congress, 2013-2018).
Karnataka has otherwise been a state defined by political flux, with governments falling well short of full terms and President's Rule imposed six times since independence.
Here is a complete list of leaders who served as Chief Ministers of Karnataka and their tenures.
| # | Chief Minister | Party | Tenure | Total Duration |
| 1 | K. Chengalaraya Reddy | Indian National Congress | Oct 25, 1947 - Mar 30, 1952 | 4 years, 157 days |
| 2 | K. Hanumanthaiah | Indian National Congress | Mar 30, 1952 - Aug 19, 1956 | 4 years, 142 days |
| 3 | Kadidal Manjappa | Indian National Congress | Aug 19, 1956 - Oct 31, 1956 | 73 days |
| 4 | S. Nijalingappa | Indian National Congress | Nov 1, 1956 - Apr 10, 1958 | 1 year, 160 days |
| 5 | B. D. Jatti | Indian National Congress | Apr 16, 1958 - Mar 9, 1962 | 3 years, 327 days |
| 6 | S. R. Kanthi | Indian National Congress | Mar 14, 1962 - Jun 21, 1962 | 99 days |
| (4) | S. Nijalingappa(Second Term) | Indian National Congress | Jun 21, 1962 - May 29, 1968 | 5 years, 343 days |
| 7 | Veerendra Patil | Indian National Congress | May 29, 1968 - Mar 18, 1971 | 2 years, 293 days |
| - | President's Rule | N/A | Mar 19, 1971 - Mar 20, 1972 | 1 year, 1 day |
| 8 | D. Devaraj Urs | Indian National Congress | Mar 20, 1972 - Dec 31, 1977 | 5 years, 286 days |
| - | President's Rule | N/A | Dec 31, 1977 - Feb 28, 1978 | 59 days |
| (8) | D. Devaraj Urs(Second Term) | Indian National Congress | Feb 28, 1978 - Jan 7, 1980 | 1 year, 313 days |
| 9 | R. Gundu Rao | Indian National Congress | Jan 12, 1980 - Jan 6, 1983 | 2 years, 359 days |
| 10* | Ramakrishna Hegde | Janata Party | Jan 10, 1983 - Aug 10, 1988 | 5 years, 213 days |
| 11 | S. R. Bommai | Janata Party | Aug 13, 1988 - Apr 21, 1989 | 251 days |
| - | President's Rule | N/A | Apr 21, 1989 - Nov 30, 1989 | 223 days |
| (7) | Veerendra Patil(Second Term) | Indian National Congress | Nov 30, 1989 - Oct 10, 1990 | 314 days |
| - | President's Rule | N/A | Oct 10, 1990 - Oct 17, 1990 | 7 days |
| 12 | S. Bangarappa | Indian National Congress | Oct 17, 1990 - Nov 19, 1992 | 2 years, 33 days |
| 13 | M. Veerappa Moily | Indian National Congress | Nov 19, 1992 - Dec 11, 1994 | 2 years, 22 days |
| 14 | H. D. Deve Gowda | Janata Dal | Dec 11, 1994 - May 31, 1996 | 1 year, 172 days |
| 15 | J. H. Patel | Janata Dal | May 31, 1996 - Oct 7, 1999 | 3 years, 129 days |
| 16 | S. M. Krishna | Indian National Congress | Oct 11, 1999 - May 28, 2004 | 4 years, 230 days |
| 17 | Dharharam Singh | Indian National Congress | May 28, 2004 - Feb 2, 2006 | 1 year, 250 days |
| 18 | H. D. Kumaraswamy | Janata Dal (Secular) | Feb 3, 2006 - Oct 8, 2007 | 1 year, 247 days |
| - | President's Rule | N/A | Oct 9, 2007 - Nov 11, 2007 | 33 days |
| 19 | B. S. Yediyurappa | Bharatiya Janata Party | Nov 12, 2007 - Nov 19, 2007 | 7 days |
| - | President's Rule | N/A | Nov 20, 2007 - May 29, 2008 | 191 days |
| (19) | B. S. Yediyurappa(Second Term) | Bharatiya Janata Party | May 30, 2008 - Jul 31, 2011 | 3 years, 62 days |
| 20 | D. V. Sadananda Gowda | Bharatiya Janata Party | Aug 4, 2011 - Jul 12, 2012 | 343 days |
| 21 | Jagadish Shettar | Bharatiya Janata Party | Jul 12, 2012 - May 13, 2013 | 305 days |
| 22 | Siddaramaiah | Indian National Congress | May 13, 2013 - May 17, 2018 | 5 years, 4 days |
| (19) | B. S. Yediyurappa(Third Term) | Bharatiya Janata Party | May 17, 2018 - May 19, 2018 | 2 days |
| (18) | H. D. Kumaraswamy(Second Term) | Janata Dal (Secular) | May 23, 2018 - Jul 23, 2019 | 1 year, 61 days |
| (19) | B. S. Yediyurappa(Fourth Term) | Bharatiya Janata Party | Jul 26, 2019 - Jul 26, 2021 | 2 years |
| 23 | Basavaraj Bommai | Bharatiya Janata Party | Jul 28, 2021 - May 15, 2023 | 1 year, 291 days |
| (22) | Siddaramaiah(Second Term) | Indian National Congress | May 20, 2023 - May 28, 2026 | 3 years, 8 days |
* After the Janata Party's poor showing in the 1984 Lok Sabha elections, he resigned on December 29, 1984, dissolved the Assembly and sought a fresh mandate. The party won the 1985 state elections and he returned to office on March 8, 1985. His second exit, on February 13, 1986, was on moral grounds after the tapping of phones of several prominent ministers came to light. He was re-elected party leader almost immediately and sworn back in on February 16, 1986, three days later. Neither gap involved President's Rule.