S. K. Bhatnagar (June 1, 1930^[2] – August 4, 2001^[3]) was a former defence secretary of India. He was a key figure of those accused in the Bofors scandal.

Sharad Kumar Bhatnagar
Indian Ambassador to  Bahrain
In office January 1983 – July 6, 1984
Preceded by	M.P.M. Menon
Succeeded by	es:Prem Singh
Defence Secretary
In office July 6, 1984 – May 31, 1988
Preceded by	SM Ghosh
Succeeded by	T. N. Seshan [1]
Governor of Sikkim
In office February 1989 – Jan. 31, 1990
Preceded by	T. V. Rajeswar
Succeeded by	Radhakrishna Hariram Tahiliani
Indian Ambassador to  Finland
In office 1996–1997
Preceded by	Prithvi Raj Sood
Succeeded by	Aladiyan Manickam

He was one of the persons to have been questioned first by the CBI after registering the First Information Report (FIR) in the Bofors pay- off case in January 1990. He was accused of abusing his official authority as the then Defence Secretary to tilt the scales in favour of the Swedish firm for the Rs. 1437-crore contract to supply 155 mm howitzer guns to the Indian Army. The contract with the Government was signed on March 24, 1986, when Rajiv Gandhi was the Prime Minister of India.

He was later made governor of Sikkim.

He died in 2001 at the age of 71.