| Honorific-Prefix: | His Excellency |
| Nirupam Sen | |
| Birth Date: | c. 1947 |
| Birth Place: | Kolkata, West Bengal, India |
| Death Date: | 2 July 2017 |
| Death Place: | New Delhi |
| Office: | Permanent Representative of India to the United Nations |
| Term Start: | September 2004 |
| Term End: | March 2009 |
| Predecessor: | Vijay K. Nambiar |
| Successor: | Hardeep Singh Puri |
| Occupation: | Diplomat (IFS) |
Nirupam Sen (1947 — 2 July 2017) was from the 1969 batch of the Indian Foreign Service. His last posting prior to retirement was as Permanent Representative of India to the United Nations. After retirement, he was appointed as Special Senior Adviser to the President of the UN General Assembly.[1] [2]
Sen presented his credentials as Permanent Representative of India to the United Nations on 17 September 2004. Prior to this appointment, Sen had been India's High Commissioner to Sri Lanka. He has previously headed Indian missions in Sofia and Oslo in Bulgaria and Norway. His predecessor as Permanent Representative of India to the United Nations was Vijay K. Nambiar his successor is Hardeep Puri.
Sen died in AMRI Hospitals, Kolkata on 24 December 2018 at the age of 71.[3]