| Cabinet Name: | First Indira Gandhi ministry |
| Cabinet Type: | ministry |
| Cabinet Number: | 6th |
| Jurisdiction: | the Republic of India |
| Flag: | Flag of India.svg |
| Flag Border: | true |
| Government Head: | Indira Gandhi |
| State Head: | Sarvepalli Radhakrishnan |
| Political Party: | Indian National Congress |
| Legislature Status: | Majority |
| Last Election: | 1967 |
| Opposition Party: | None |
| Opposition Leader: | None |
| Previous: | Second Nanda ministry |
| Successor: | Second Indira Gandhi ministry |
The First Indira Gandhi ministry was formed on 24 January 1966[1] under the premiership of Indira Gandhi who was elected as the Prime Minister of India by the Congress Parliamentary Party to succeed Gulzarilal Nanda who was serving as the acting prime minister since 11 January 1966 following the untimely demise of Lal Bahadur Shastri.The cabinet remained in office until the 1967 general election in which Indira Gandhi was re-elected to office.
Prime Minister Lal Bahadur Shastri passed away suddenly on 11 January 1966 at Tashkent during his visit to Uzbek SSR, just a day after signing the Tashkent Declaration which formally ended the Indo-Pakistani War of 1965. He was succeeded by Home Minister Gulzarilal Nanda as the Acting Prime Minister. Nanda remained the prime minister for thirteen days until the election of Indira Gandhi who served as Minister of Information and Broadcasting in the cabinets of Shastri and Nanda. Indira Gandhi was formally elected as the Prime Minister by the ruling Indian National Congress party. She was thereupon formally sworn-in as the nation's third prime minister on 24 January 1966 by President Sarvepalli Radhakrishnan.
Gandhi's council of ministers included a majority of the ministers from her predecessor's cabinet. Outgoing acting prime minister Gulzarilal Nanda was re-appointed home minister. She retained Defence Minister Yashwantrao Chavan, Education Minister M. C. Chagla, Railways Minister S. K. Patil, Finance Minister Sachindra Chaudhuri, Communications and Parliamentary Minister Satya Narayan Sinha, Agriculture Minister Chidambaram Subramaniam, External Affairs Minister Swaran Singh in their respective portfolios. Other ministers who were retained from the predecessor cabinet included Neelam Sanjiva Reddy, Damodaram Sanjivayya, Manubhai Shah, Mehr Chand Khanna, Raj Bahadur, Surendra Kumar Dey, Sushila Nayyar, Jaisukhlal Hathi, Kotha Raghuramaiah, O. V. Alagesan, Ram Subhag Singh, Bali Ram Bhagat, A. M. Thomas, C. M. Poonacha, Jagannath Rao, C. R. Pattabhiraman, Bibudhendra Mishra, Tribhuvan Narain Singh, Shah Nawaz Khan, Dajisaheb Chavan, Purnendu Sekhar Naskar, B. S. Murthy, Lalit Narayan Mishra, T. S. Soundaram, Bhakt Darshan, Sham Nath, B. C. Bhagawati, Shyam Dhar Mishra.
!Remarks
!style="width:15em"| Remarks