K. M. Chandrasekhar (born 20 February 1948) is a retired Indian civil servant, who was the 29th Cabinet Secretary of the Republic of India from 2007 to 2011 for a four-year term under which he directly reported to the Prime Minister Dr. Manmohan Singh. He is a 1970 batch Indian Administrative Service officer from Kerala Cadre.^[2] In 2023, he was honoured with Kerala Sree Award, third highest civilian award given by the Government of Kerala.^[3]

K. M. Chandrasekhar was born in Kerala to Ittyanath Thangamani from Ittyanath family Villadom, Thrissur and Kesava Menon, who was Chairman of the Railway Service Commission. He is the nephew of I. K. K. Menon, the eminent Malayalam writer who also served as the Secretary to the Election Commission of India (ECI). After graduating from college, he got an MA in history from the University of Delhi. He then earned his M.A. in Management Studies from the University of Leeds.

Chandrasekhar worked in the Indian Administrative Service from 1970 to 2011. During the last four years of his career, he held the highest position achievable in the Indian civil services, that of Union Cabinet Secretary, reporting directly to Prime Minister Manmohan Singh. After his retirement in 2011, he was offered a position equivalent to Cabinet Minister in his home State, Kerala, as Vice Chairman of the State Planning Board,^[4] which he held for the next five years until 2016. He has been Revenue Secretary in the Ministry of Finance, Government of India, and Finance Secretary in his State Government. In the Ministry of Commerce, he has worked as Chairman of the Spices Board (of which he was founder chairman), as Joint Secretary (Trade Policy Division) in the Ministry and in two diplomatic assignments abroad.^{[citation needed]} He is on the Boards of ten companies, eight of them in the Tata Group and the others in the health care sector.^[5][6] He has been Chairman of the Federal Bank, President of a medical research institute and hospital under the Department of Science and Technology, Government of India (the Sri Chithra Institute of Medical Sciences and Technology, Trivandrum) and currently chairs, in an elected capacity, an economic think tank, teaching and research institution, the Centre for Development Studies, Trivandrum, affiliated to the Jawaharlal Nehru University, New Delhi.^[7] He is also Honorary Adviser to an Ayurvedic institution, the Arya Vaidya Sala, Kottakkal. His memoir 'As Good as My Word' is published by Harper Collins India in December 2022 and he is now working on his second book.^[8][9][10]

Chandrasekhar is married to Jaya, who taught English language and literature. They have a daughter.^[11]