| Rajnagar, Bihar | |
|---|---|
| Constituency No. 37 for the Bihar Legislative Assembly | |
 | |
| Constituency details | |
| Country | India |
| Region | East India |
| State | Bihar |
| District | Madhubani |
| Established | 1967 |
| Reservation | SC |
| Elected year | 2020 |
Rajnagar Assembly constituency is an assembly constituency in Madhubani district in the Indian state of Bihar. It is reserved for scheduled castes.