| Banmankhi Assembly constituency | |
|---|---|
| Constituency No. - for the Bihar Legislative Assembly | |
 | |
| Constituency details | |
| Country | India |
| Region | East India |
| State | Bihar |
| Established | 1962 |
| Reservation | SC |
| Elected year | 2020 |
Banmankhi is an assembly constituency in Purnia district in the Indian state of Bihar. It is reserved for scheduled castes.