| J. Jayasingh Thiyagaraj Natterjee | |
| Office: | Member of Parliament, Lok Sabha |
| Term Start: | 4 June 2014 |
| Term End: | 24 May 2019 |
| 1Blankname: | Leader of the House |
| 1Namedata: | Narendra Modi |
| Predecessor: | S. R. Jeyadurai |
| Successor: | Kanimozhi Karunanidhi |
| Constituency: | Thoothukkudi |
| Office1: | Chairperson – District Development Coordination and Monitoring Committee |
| Term Start1: | 4 June 2014 |
| Term End1: | 24 May 2019 |
| Predecessor1: | S. R. Jeyadurai |
| Successor1: | Kanimozhi Karunanidhi |
| Office2: | Chairperson – Tuticorin Airport Advisory Committee |
| Term Start2: | 4 June 2014 |
| Term End2: | 24 May 2019 |
| Predecessor2: | S. R. Jeyadurai |
| Successor2: | Kanimozhi Karunanidhi |
| Birth Date: | 1953 4, df=yes |
| Citizenship: | Indian |
| Party: | All India Anna Dravida Munnetra Kazhagam |
| Profession: | Lawyer |
J. Jayasingh Thiyagaraj Natterjee is an Indian lawyer and politician belonging to the All India Anna Dravida Munnetra Kazhagam (AIADMK). He was a former Member of Parliament, representing Thoothukkudi constituency in the Lok Sabha (the lower house of India's Parliament) from 2014 to 2019.
J.J.T.Natterjee is a native of the Jacobpuram village, which is located in the Radhapuram taluk. He joined the AIADMK in 1984 before M.G R. He was the party's organizing secretary from 2015-2019, now he is the deputy secretary of AIADMK lawyers' wing. He is also an administrative committee member of the Church of South India's Tuticorin-Nazareth Diocese.[1]
In the 2014 Lok Sabha elections, he defeated P. Jegan of Dravida Munnetra Kazhagam by a margin of 1,24,002 votes.[2]