<P> Since 1947 , twenty - two people have been Chief Minister of Mysore ( as the state was known before 1 November 1973 ) and Karnataka . A majority of them belonged to the Indian National Congress party , including inaugural office - holder K. Chengalaraya Reddy . The longest - serving chief minister , D. Devaraj Urs , held the office for over seven years in the 1970s . As a Janata Party member , Ramakrishna Hegde served the most number of discontinuous terms ( three ) , while the Congress 's Veerendra Patil had the largest gap between two terms ( over eighteen years ) . One chief minister , H.D. Deve Gowda , went on to become the eleventh Prime Minister of India , while another , B.D. Jatti , served as the country 's fifth Vice President . There have been six instances of President 's rule in Karnataka , most recently in 2007 -- 08 . </P>
<P> Since 1947 , twenty - two people have been Chief Minister of Mysore ( as the state was known before 1 November 1973 ) and Karnataka . A majority of them belonged to the Indian National Congress party , including inaugural office - holder K. Chengalaraya Reddy . The longest - serving chief minister , D. Devaraj Urs , held the office for over seven years in the 1970s . As a Janata Party member , Ramakrishna Hegde served the most number of discontinuous terms ( three ) , while the Congress 's Veerendra Patil had the largest gap between two terms ( over eighteen years ) . One chief minister , H.D. Deve Gowda , went on to become the eleventh Prime Minister of India , while another , B.D. Jatti , served as the country 's fifth Vice President . There have been six instances of President 's rule in Karnataka , most recently in 2007 -- 08 . </P>
who is the first chief minister of unified karnataka
who is the first chief minister of unified karnataka
K. Chengalaraya Reddy
K. Chengalaraya Reddy