In the Republic of India, achief minister is thehead of government of each of thetwenty-eight states and three of the eightunion territories. According to theConstitution of India, at the state level, thegovernor isde jure head, and thede facto executive authority rests with the chief minister. Following elections to thelegislative assembly, the governor usually invites the party (or coalition) with a majority of seats to form thegovernment. The governor appoints the chief minister, whosecouncil of ministers arecollectively responsible to the assembly. Given they have the assembly's confidence, the chief minister's term is for a maximum of five years. There are no limits to thenumber of terms they can serve.[1]
The chief minister usually serves as the leader of the house in the respective legislative assembly.[2] Out of the thirty incumbents, exceptTamil Nadu'sM. K. Stalin,[a] all other chief ministers also act as the leader of the house.
Of the 31 incumbents,fifteen incumbents belong to theBharatiya Janata Party andthree to theIndian National Congress, with no other party having more than one chief minister in office.Nitish Kumar fromBihar, has had thelongest tenure (19 years, 178 days) as a chief minister.[4]Mamata Banerjee ofWest Bengal, serving since 20 March 2011 (for 14 years, 271 days), has the longest continuous incumbency.Kerala'sPinarayi Vijayan (aged 80) is the oldest andPema Khandu (aged 46), fromArunachal Pradesh is the youngest. Banejee andDelhi'sRekha Gupta are the only two incumbentfemale chief ministers.