| Dadan Pahalwan | |
| Birth Date: | 1964 1, df=yes[1] |
| Birth Place: | Samhar, Dumraon Buxar, India |
| Residence: | Patna, Bihar |
| Office: | Member of Bihar Legislative Assembly |
| Constituency: | Dumraon |
| Term Start: | 2015 |
| Term End: | 2020 |
| Predecessor: | Dr. Daud Ali |
| Successor: | Ajit Kumar Singh |
| Party: | Janata Dal (United) |
| Alma Mater: | Intermediate |
| Profession: | Politician |
Dadan Singh Yadav alias Dadan Pahalwan is an Indian politician. He was elected to the Bihar Legislative Assembly from Dumraon as the 2015 Member of Bihar Legislative Assembly as a member of the Janata Dal (United).[2] He contested the 2014 Indian general election as a candidate of the Bahujan Samaj Party but lost.[3]