| Rosera | |
|---|---|
| Constituency No. 139 for the Bihar Legislative Assembly | |
 | |
| Constituency details | |
| Country | India |
| Region | East India |
| State | Bihar |
| District | Samastipur |
| LS constituency | Samastipur |
| Established | 1951 |
| Reservation | SC |
| Member of Legislative Assembly | |
| 17th Bihar Legislative Assembly | |
| Incumbent Birendra Kumar | |
| Party | BJP |
| Alliance | NDA |
| Elected year | 2020 |
Rosera is an assembly constituency in Samastipur district in the Indian state of Bihar. The seat is reserved for members of the Scheduled Castes.[1]