Madhubani

The geographic coordinates of Madhubani Assembly constituency are: 26°16'29.3"N 86°06'00.0"E. This constituency falls in Madhubani district of Bihar and in the Mithila region. Madhubani shares its borders with five other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Madhubani are: Rajnagar, Bisfi, Keoti, Darbhanga Rural, Jhanjharpur. This constituency shares an inter-state border with .

There were a total of 337340 registered voters on the electoral rolls for the 2025 Assembly election in Madhubani Assembly constituency, of which 178000 were male, 159322 female and 18 of the third gender. In the 2020 Assembly elections, there were a total of 346962 registered voters, of which 182539 were male, 164400 female and 23 from the third gender. In the 2015 Assembly elections, there were a total of 320210 registered voters, of which 170139 were male, 150057 female and 290 from the third gender. In 2010 elections, there were a total of 266042 registered voters in this constituency, of which 145445 were male and 120597 female and 184 from the third gender.

The number of service voters in this Assembly constituency was 440 in 2020, 14 in 2015, and 0 in 2010.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2025 was 895, in 2020 it was 901, 882 in 2015, and 829 in 2010.

Madhubani 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 2 on Tuesday, November 3, 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.36. Madhubani comprises of the following areas of Madhubani district in the Mithila region of Bihar: CD Block Pandaul; Gram Panchayats Basuara, Bhachhi, Bhavara, Lachhminagar, Sonaur, Maksuda, Khajuri, Shambhuar, Sundarpur Bhitthi, Balia & Madhubani (M) of Madhubani CD Block.

This constituency covers an approximate area of 228.01 square kilometers and the geographic coordinates of Madhubani is: 26°16'29.3"N 86°06'00.0"E.

A total of five Assembly constituencies in the state of Bihar share borders with Madhubani constituency, which are: Rajnagar, Bisfi, Keoti, Darbhanga Rural, Jhanjharpur. 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 Madhubani constituency was 62.09%. In 2020, this seat registered a turnout of 54.13%, while it was 53% in 2015, and 45.51% in 2010.

In the 2020 Bihar Assembly elections, Samir Kumar Mahaseth of RJD won in this constituency beating Suman Kumar Mahaseth of VIP by a margin of 6814 votes which was 3.63% of the total votes cast. In 2015, Samir Kumar Mahaseth of RJD was the winner in this seat beating Ramdeo Mahto of BJP by a margin of 7307 votes which was 4.31% of the total votes polled in the constituency. In the 2010 Assembly elections, Ram Deo Mahto of BJP won this seat defeating Naiyar Azam of RJD by a margin of 588 votes which was 0.49% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Samir Kumar Mahaseth of RJD had a vote share of 38% in this seat. In the 2015 Assembly elections, Samir Kumar Mahaseth of RJD got a vote share of 45.27% , In the 2010 Assembly elections, Ram Deo Mahto of BJP got a vote share of 37.01% in Madhubani.