Banmankhi

The geographic coordinates of Banmankhi Assembly constituency are: 25°51'43.2"N 87°06'50.0"E. This constituency falls in Purnia district of Bihar and in the Koshi region. Banmankhi shares its borders with six other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Banmankhi are: Raniganj, Alamnagar, Korha, Kasba, Banmankhi, Amour. This constituency shares an inter-state border with .

There were a total of 299714 registered voters on the electoral rolls for the 2025 Assembly election in Banmankhi Assembly constituency, of which 156599 were male, 143108 female and 7 of the third gender. In the 2020 Assembly elections, there were a total of 307554 registered voters, of which 158400 were male, 149140 female and 14 from the third gender. In the 2015 Assembly elections, there were a total of 283039 registered voters, of which 146954 were male, 136079 female and 103 from the third gender. In 2010 elections, there were a total of 232413 registered voters in this constituency, of which 122280 were male and 110133 female and 59 from the third gender.

The number of service voters in this Assembly constituency was 278 in 2020, 6 in 2015, and 0 in 2010.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2025 was 914, in 2020 it was 942, 926 in 2015, and 901 in 2010.

Banmankhi Assembly constituency will go to the polls in Phase 2 of the 2025 Bihar Assembly elections on Tuesday, November 11, 2025. The counting of votes is on Friday, November 14, 2025.

In the 2020 state Assembly elections, this seat voted in Phase 3 on Saturday, November 7, 2020 and the results were declared on Tuesday, November 10, 2020.

In the 2015 state Assembly elections, this seat voted in Phase 5 on Thursday, November 5, 2015 and the results were declared on Sunday, November 8, 2015.

In the 2010 polls, this constituency voted in Phase 1 on Thursday, October 21, 2010 and the results were declared on Wednesday, November 24, 2010.

Assembly constituency no.59. Banmankhi comprises of the following areas of Purnia district in the Koshi region of Bihar: CD Block Banmankhi; Gram Panchayats Aurahi, Barhara Kothi, Dibara Dhani, Gouripur, Latraha, Mulkiya, Nipania, Rustampur, Sukhsena East, Sukhsena West & Matihani of Barhara Kothi CD Block.

This constituency covers an approximate area of 469.82 square kilometers and the geographic coordinates of Banmankhi is: 25°51'43.2"N 87°06'50.0"E.

A total of six Assembly constituencies in the state of Bihar share borders with Banmankhi constituency, which are: Raniganj, Alamnagar, Korha, Kasba, Banmankhi, Amour. This constituency shares an inter-state border with .

According to data released by the Election Commission of India, in the 2025 Bihar Assembly elections, the estimated voter turnout in this Banmankhi constituency was 70.76%. In 2020, this seat registered a turnout of 58.92%, while it was 58.27% in 2015, and 54.44% in 2010.

In the 2020 Bihar Assembly elections, Krishna Kumar Rishi of BJP won in this constituency beating Upendra Sharma of RJD by a margin of 27743 votes which was 15.34% of the total votes cast. In 2015, Krishna Kumar Rishi of BJP was the winner in this seat beating Sanjiv Kumar Paswan of RJD by a margin of 708 votes which was 0.43% of the total votes polled in the constituency. In the 2010 Assembly elections, Krishna Kumar Rishi of BJP won this seat defeating of RJD by a margin of 44890 votes which was 35.48% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Krishna Kumar Rishi of BJP had a vote share of 51.74% in this seat. In the 2015 Assembly elections, Krishna Kumar Rishi of BJP got a vote share of 35.82% , In the 2010 Assembly elections, Krishna Kumar Rishi of BJP got a vote share of 53.71% in Banmankhi.