Amarpur

The geographic coordinates of Amarpur Assembly constituency are: 25°01'36.8"N 86°55'58.1"E. This constituency falls in Banka district of Bihar and in the Bhagalpur region. Amarpur shares its borders with six other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Amarpur are: Sultanganj, Nathnagar, Dhauraiya, Banka, Belhar, Tarapur. This constituency shares an inter-state border with .

There were a total of 297239 registered voters on the electoral rolls for the 2025 Assembly election in Amarpur Assembly constituency, of which 157895 were male, 139341 female and 3 of the third gender. In the 2020 Assembly elections, there were a total of 295587 registered voters, of which 158803 were male, 136784 female and 0 from the third gender. In the 2015 Assembly elections, there were a total of 276830 registered voters, of which 149530 were male, 127291 female and 559 from the third gender. In 2010 elections, there were a total of 233495 registered voters in this constituency, of which 126811 were male and 106684 female and 391 from the third gender.

The number of service voters in this Assembly constituency was 829 in 2020, 9 in 2015, and 0 in 2010.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2025 was 882, in 2020 it was 861, 851 in 2015, and 841 in 2010.

Amarpur 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.159. Amarpur comprises of the following areas of Banka district in the Bhagalpur region of Bihar: CD Blocks Shambhuganj & Amarpur.

This constituency covers an approximate area of 351.61 square kilometers and the geographic coordinates of Amarpur is: 25°01'36.8"N 86°55'58.1"E.

A total of six Assembly constituencies in the state of Bihar share borders with Amarpur constituency, which are: Sultanganj, Nathnagar, Dhauraiya, Banka, Belhar, Tarapur. 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 Amarpur constituency was 64.86%. In 2020, this seat registered a turnout of 55.55%, while it was 55.6% in 2015, and 49.68% in 2010.

In the 2020 Bihar Assembly elections, Jayant Raj of JDU won in this constituency beating Jitendra Singh of INC by a margin of 3114 votes which was 1.9% of the total votes cast. In 2015, Janardan Manjhi of JDU was the winner in this seat beating Mrinal Shekhar of BJP by a margin of 11773 votes which was 7.65% of the total votes polled in the constituency. In the 2010 Assembly elections, Janardan Manjhi of JDU won this seat defeating Surendra Prasad Singh of RJD by a margin of 18007 votes which was 15.52% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Jayant Raj of JDU had a vote share of 33.13% in this seat. In the 2015 Assembly elections, Janardan Manjhi of JDU got a vote share of 47.89% , In the 2010 Assembly elections, Janardan Manjhi of JDU got a vote share of 40.78% in Amarpur.