Sultanganj

The geographic coordinates of Sultanganj Assembly constituency are: 25°10'59.9"N 86°48'04.0"E. This constituency falls in Bhagalpur district of Bihar and in the Bhagalpur region. Sultanganj shares its borders with six other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Sultanganj are: Parbhatta, Bihpur, Nathnagar, Amarpur, Tarapur, Munger. This constituency shares an inter-state border with .

There were a total of 316131 registered voters on the electoral rolls for the 2025 Assembly election in Sultanganj Assembly constituency, of which 164799 were male, 151314 female and 18 of the third gender. In the 2020 Assembly elections, there were a total of 328314 registered voters, of which 174194 were male, 154100 female and 20 from the third gender. In the 2015 Assembly elections, there were a total of 309131 registered voters, of which 164723 were male, 144386 female and 806 from the third gender. In 2010 elections, there were a total of 263544 registered voters in this constituency, of which 142405 were male and 121139 female and 471 from the third gender.

The number of service voters in this Assembly constituency was 1201 in 2020, 22 in 2015, and 0 in 2010.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2025 was 918, in 2020 it was 885, 877 in 2015, and 851 in 2010.

Sultanganj 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 1 on Wednesday, October 28, 2020 and the results were declared on Tuesday, November 10, 2020.

In the 2015 state Assembly elections, this seat voted in Phase 1 on Monday, October 12, 2015 and the results were declared on Sunday, November 8, 2015.

In the 2010 polls, this constituency voted in Phase 4 on Monday, November 1, 2010 and the results were declared on Wednesday, November 24, 2010.

Assembly constituency no.157. Sultanganj comprises of the following areas of Bhagalpur district in the Bhagalpur region of Bihar: CD Blocks Sultanganj & Shahkund.

This constituency covers an approximate area of 374.55 square kilometers and the geographic coordinates of Sultanganj is: 25°10'59.9"N 86°48'04.0"E.

A total of six Assembly constituencies in the state of Bihar share borders with Sultanganj constituency, which are: Parbhatta, Bihpur, Nathnagar, Amarpur, Tarapur, Munger. 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 Sultanganj constituency was 65.65%. In 2020, this seat registered a turnout of 52.13%, while it was 50.06% in 2015, and 46.88% in 2010.

In the 2020 Bihar Assembly elections, Lalit Narayan Mandal of JDU won in this constituency beating Lalan Kumar of INC by a margin of 11565 votes which was 6.76% of the total votes cast. In 2015, Subodh Roy of JDU was the winner in this seat beating Himanshu Prasad of BLSP by a margin of 14033 votes which was 9.07% of the total votes polled in the constituency. In the 2010 Assembly elections, Subodh Rai of JDU won this seat defeating Ramavatar Mandal of RJD by a margin of 4845 votes which was 3.92% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Lalit Narayan Mandal of JDU had a vote share of 42.58% in this seat. In the 2015 Assembly elections, Subodh Roy of JDU got a vote share of 40.94% , In the 2010 Assembly elections, Subodh Rai of JDU got a vote share of 28.05% in Sultanganj.