| Office: | Minister of Department of Science and Technology, Bihar |
| Predecessor: | Ashok Choudhary |
| Office2: | Member of Bihar Legislative Assembly |
| Constituency2: | Dinara, Bihar |
| Office3: | Minister of Department of Industries, Bihar |
| Successor3: | Shyam Rajak |
| Office4: | Minister of Cooperative Department, Bihar |
| Predecessor4: | Nitish Kumar |
| Successor4: | Alok Kumar Mehta |
| Birth Date: | 1963 3, df=y |
| Birth Place: | Parasdiha, Rohtas district, Bihar |
| Party: | Janata Dal (United) |
| Spouse: | Puja Singh |
| Children: | 2 |
| Education: | Bachelor of Technology |
| Termend: | 09 August 2022 |
| Successor: | Sumit Kumar Singh |
Jai Kumar Singh is an Indian politician from Rohtas district of Bihar, India.[1] [2] He served as Minister of Department of Science and Technology, Bihar and is Member of Bihar Legislative Assembly representing Dinara vidhan sabha constituency since 2005.[3] [4]
Singh made entry into politics in 2001 as member of Rohtas district council. In 2005 Bihar Legislative Assembly election, he won from Dinara Vidhan sabha constituency. Again in 2010 Bihar Legislative Assembly election and 2015 Bihar Legislative Assembly election, he won from the same constituency. He also held the position as Minister of Cooperative Department of Government of Bihar in 2014. Currently, he is Minister of Department of Science and Technology, Bihar.[5]