Bihariganj

The geographic coordinates of Bihariganj Assembly constituency are: 25°47'21.1"N 86°56'42.7"E. This constituency falls in Madhepura district of Bihar and in the Koshi region. Bihariganj shares its borders with six other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Bihariganj are: Baisi, Alamnagar, Bihariganj, Singheshwar, Barari, Rupauli. This constituency shares an inter-state border with .

There were a total of 326795 registered voters on the electoral rolls for the 2025 Assembly election in Bihariganj Assembly constituency, of which 170249 were male, 156540 female and 6 of the third gender. In the 2020 Assembly elections, there were a total of 308766 registered voters, of which 159981 were male, 148775 female and 10 from the third gender. In the 2015 Assembly elections, there were a total of 284140 registered voters, of which 147321 were male, 136811 female and 177 from the third gender. In 2010 elections, there were a total of 251476 registered voters in this constituency, of which 132365 were male and 119111 female and 145 from the third gender.

The number of service voters in this Assembly constituency was 226 in 2020, 8 in 2015, and 0 in 2010.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2025 was 919, in 2020 it was 930, 929 in 2015, and 900 in 2010.

Bihariganj Assembly constituency will go to the polls in Phase 1 of the 2025 Bihar Assembly elections on Thursday, November 6, 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.71. Bihariganj comprises of the following areas of Madhepura district in the Koshi region of Bihar: CD Blocks Gualpara & Bihariganj; Gram Panchayats Biriranpal, Madhuban, Rampur Khora, Kishunganj, Lakshmipur, Barahi Anadpura & Pipra Karoti of Uda Kishunganj CD Block; Gram Panchayats Haripur Kala, Digghi, Singiyon, Raghunathpur, Kolhaypatti Dumriya, Rajni, Gangapur, Dinapatti Sakhuwa, Pokhram Parmanadpur, Jorgama, Rampur & Murliganj (NA) of Murliganj CD Block.

This constituency covers an approximate area of 406.49 square kilometers and the geographic coordinates of Bihariganj is: 25°47'21.1"N 86°56'42.7"E.

A total of six Assembly constituencies in the state of Bihar share borders with Bihariganj constituency, which are: Baisi, Alamnagar, Bihariganj, Singheshwar, Barari, Rupauli. 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 Bihariganj constituency was 67.46%. In 2020, this seat registered a turnout of 60.53%, while it was 60.96% in 2015, and 60.69% in 2010.

In the 2020 Bihar Assembly elections, Niranjan Kumar Mehta of JDU won in this constituency beating Subhashini Bundela Alias Subhashini Sharad Yadav of INC by a margin of 18711 votes which was 10.01% of the total votes cast. In 2015, Niranjan Kumar Mehta of JDU was the winner in this seat beating Ravindra Charan Yadav of BJP by a margin of 29253 votes which was 16.9% of the total votes polled in the constituency. In the 2010 Assembly elections, Renu Kumari of JDU won this seat defeating Prabhash Kumar of RJD by a margin of 49997 votes which was 32.76% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Niranjan Kumar Mehta of JDU had a vote share of 43.63% in this seat. In the 2015 Assembly elections, Niranjan Kumar Mehta of JDU got a vote share of 45.26% , In the 2010 Assembly elections, Renu Kumari of JDU got a vote share of 51.8% in Bihariganj.