Parmeshwar Narayan Haksar (4 September 1913 – 25 November 1998) was an Indian bureaucrat and diplomat, best known for his two-year stint as Prime Minister Indira Gandhi's principal secretary (1971–73). In that role, Haksar was the chief strategist and policy adviser behind his inexperienced prime minister's rise to near-absolute power in the mid-1970s. After this he was appointed deputy chairman of the Planning Commission and then the first-ever chancellor of New Delhi's Jawaharlal Nehru University.