Who is the longest serving prime minister of India ?

The longest-serving Prime Minister was Jawaharlal Nehru , also the first Prime Minister, whose rule lasted 16 years and 286 days . His premiership was followed by Lal Bahadur Shastri 's short tenure and Indira Gandhi 's 11- and 4-year-long tenures, both politicians belonging to the Indian National Congress . After Gandhi's assassination , her son Rajiv took charge until 1989, when a decade with six unstable governments began. This was followed by the full terms of Atal Bihari Vajpayee , Manmohan Singh , and Narendra Modi . Modi is the 14th and current Prime Minister of India, serving since 26 May 2014