Supaul

The geographic coordinates of Supaul Assembly constituency are: 26°08'06.7"N 86°32'57.5"E. This constituency falls in Supaul district of Bihar and in the Koshi region. Supaul shares its borders with five other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Supaul are: Pipra, Nirmali, Phulparas, Mahishi, Madhepura. This constituency shares an inter-state border with .

There were a total of 292403 registered voters on the electoral rolls for the 2025 Assembly election in Supaul Assembly constituency, of which 154248 were male, 138155 female and 0 of the third gender. In the 2020 Assembly elections, there were a total of 288703 registered voters, of which 150627 were male, 138067 female and 9 from the third gender. In the 2015 Assembly elections, there were a total of 263776 registered voters, of which 137835 were male, 125936 female and 179 from the third gender. In 2010 elections, there were a total of 219369 registered voters in this constituency, of which 115086 were male and 104283 female and 134 from the third gender.

The number of service voters in this Assembly constituency was 402 in 2020, 5 in 2015, and 0 in 2010.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2025 was 896, in 2020 it was 917, 914 in 2015, and 906 in 2010.

Supaul 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.43. Supaul comprises of the following areas of Supaul district in the Koshi region of Bihar: CD Block Marauna; Gram Panchayats Gopalpur Sire, Bakaur, Ghuran, Baruari, Pipra Khurd, Ramdatt Patti, Balwa, Karnpur, Laukha, Basbitti, Goth Baruari, Ekma, Balha, Bairo, Sukhpur Solhni, Telwa, Bairiya, Chainsinghpatti, Malhni, Parsarma Parsauni & Supaul (M) of Supaul CD Block.

This constituency covers an approximate area of 391.54 square kilometers and the geographic coordinates of Supaul is: 26°08'06.7"N 86°32'57.5"E.

A total of five Assembly constituencies in the state of Bihar share borders with Supaul constituency, which are: Pipra, Nirmali, Phulparas, Mahishi, Madhepura. 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 Supaul constituency was 70.95%. In 2020, this seat registered a turnout of 59.54%, while it was 57.15% in 2015, and 55.33% in 2010.

In the 2020 Bihar Assembly elections, Bijendra Prasad Yadav of JDU won in this constituency beating Minnatullah Rahmani of INC by a margin of 28099 votes which was 16.37% of the total votes cast. In 2015, Bijendra Prasad Yadav of JDU was the winner in this seat beating Kishor Kumar of BJP by a margin of 37397 votes which was 24.85% of the total votes polled in the constituency. In the 2010 Assembly elections, Bijendra Prasad Yadav of JDU won this seat defeating Ravindra Kumar Raman of RJD by a margin of 15400 votes which was 12.69% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Bijendra Prasad Yadav of JDU had a vote share of 50.2% in this seat. In the 2015 Assembly elections, Bijendra Prasad Yadav of JDU got a vote share of 54.69% , In the 2010 Assembly elections, Bijendra Prasad Yadav of JDU got a vote share of 45.47% in Supaul.