| Birth Date: | 2 August 1954 |
| Birth Place: | Jamui, Bihar, India |
| Residence: | Jamui |
| Office: | Minister of State for Water Resources |
| Term Start: | 23 May 2004 |
| Term End: | 6 November 2005 |
| Primeminister: | Manmohan Singh |
| Predecessor: | Bijoya Chakravarty |
| Term Start1: | 24 October 2006 |
| Term End1: | 22 May 2009 |
| Successor1: | Vincent Pala |
| Office2: | Member of Parliament, Lok Sabha |
| Term Start2: | 2004 |
| Term End2: | 2009 |
| Predecessor2: | Brahmanand Mandal |
| Successor2: | Rajiv Ranjan Singh |
| Constituency2: | Munger |
| Term Start3: | 2014 |
| Term End3: | 2019 |
| Predecessor3: | Putul Kumari |
| Successor3: | Giridhari Yadav |
| Party: | Rashtriya Janata Dal |
| Spouse: | Savita Yadav |
| Children: | 2 daughters |
| Website: | www.rashtriyajanatadal.com |
| Date: | 26 September |
| Year: | 2006 |
| Source: | http://164.100.24.208/ls/lsmember/biodata.asp?mpsno=4095 |
Jay Prakash Narayan Yadav (born 2 August 1954) is an Indian politician from Bihar. He served as the Minister of State of Water Resources[1] during UPA I under then Prime Minister Manmohan Singh. He was a member of the 14th Lok Sabha of India. Yadav represented the Munger constituency of Bihar and is a member of the Rashtriya Janata Dal (RJD) political party. He won the 2014 Indian general election from Banka Constituency and in 2019 and 2024 lost to Giridhari Yadav from the same constituency.
Jai Prakash Narayan Yadav was born in Barhat, Jamui district, in Bihar state. His late father's name is Akhileshwar Prasad Yadav and his mother's name is Shanti Devi. Yadav holds a degree of Masters of Arts and Bachelor of Law from Patna University, Bihar. He married Savita Yadav on 18 February 1991. They have two daughters, elder Divya Prakash and younger Shefali Roy.