Today Odisha's Naveen Patnaik completed fourth year of his fifth term as Chief Minister of the state.

Serving as the Chief Minister for 24 years, but just not Patnaik, India have had many Chief Ministers who served their states for long tenures.

Pawan Kumar Chamling of Sikkim has been the longest serving Chief Minister in India. He was in office for 24 years and 166 days from the year 1994 to 2019.

Just few more days than Naveen Patnaik, surely the Odisha CM will beat that and is in process of becoming the longest serving Chief Minister in India.

After Chamling and Patnaik, is West Bengal's Jyoti Basu. The Communist Party of India (Marxist) leader served the state as a Chief Minister for 23 years from 1977 to 2000.

What's interesting to see is after Basu, the longest serving Chief Minister is of Arunachal Pradesh's Gegong Apang, who served for 22 years but at different time periods and was in different political parties. He served as a CM from 1980 to 1989 then from 2003 till 2007.

Mizoram also had a long serving Chief Minister, Lal Thanhawla of Indian National Congress was the state's CM for 22 years, from 1984-1986, 1989-1998 and 2008 to 2018.

Other long serving Chief Ministers of different states of India are

- Virbhadra Singh of Himachal Pradesh, he served as a CM for 21 years from 1993 to 1998, 2003-2007, 2012-2017.

- Manik Sarkar of Tripura, served as CM for 19 years 363 days from 1998-2018.

- M. Karunanidhi of Tamil Nadu, 18 years and 362 days, from 1969-1976, 1989-1991, 1996-2001 and 2006-2011.

- Prakash Singh Badal of Punjab, he served as CM for 18 years 350 days from 1970-191, 1977-1980, 1997-2002 and 2007-2017.

- The state of Himachal Pradesh had another long-serving Chief Minister, Yashwant Singh Parmar, he served the state for 18 years from 1952-1956 and 1963-1977.

- Shri Krishna Sinha of Bihar for 17 year from 1937-1939 and 1946 to 1961.