Sonepur

The geographic coordinates of Sonepur Assembly constituency are: 25°42'31.3"N 85°09'39.2"E. This constituency falls in Saran district of Bihar and in the Bhojpur region. Sonepur shares its borders with seven other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Sonepur are: Parsa, Hajipur, Garkha, Maner, Danapur, Digha, Bankipur. This constituency shares an inter-state border with .

There were a total of 288282 registered voters on the electoral rolls for the 2025 Assembly election in Sonepur Assembly constituency, of which 151900 were male, 136380 female and 2 of the third gender. In the 2020 Assembly elections, there were a total of 288143 registered voters, of which 152564 were male, 135578 female and 1 from the third gender. In the 2015 Assembly elections, there were a total of 267918 registered voters, of which 144556 were male, 123358 female and 1027 from the third gender. In 2010 elections, there were a total of 223755 registered voters in this constituency, of which 122848 were male and 100907 female and 569 from the third gender.

The number of service voters in this Assembly constituency was 1148 in 2020, 4 in 2015, and 0 in 2010.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2025 was 898, in 2020 it was 889, 853 in 2015, and 821 in 2010.

Sonepur 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 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 3 on Wednesday, October 28, 2015 and the results were declared on Sunday, November 8, 2015.

In the 2010 polls, this constituency voted in Phase 3 on Thursday, October 28, 2010 and the results were declared on Wednesday, November 24, 2010.

Assembly constituency no.122. Sonepur comprises of the following areas of Saran district in the Bhojpur region of Bihar: CD Blocks Dighwara & Sonepur.

This constituency covers an approximate area of 238.03 square kilometers and the geographic coordinates of Sonepur is: 25°42'31.3"N 85°09'39.2"E.

A total of seven Assembly constituencies in the state of Bihar share borders with Sonepur constituency, which are: Parsa, Hajipur, Garkha, Maner, Danapur, Digha, Bankipur. 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 Sonepur constituency was 68.2%. In 2020, this seat registered a turnout of 59.01%, while it was 58.59% in 2015, and 53.81% in 2010.

In the 2020 Bihar Assembly elections, Dr. Ramanuj Prasad of RJD won in this constituency beating Vinay Kumar Singh of BJP by a margin of 6686 votes which was 3.94% of the total votes cast. In 2015, Dr Ramanuj Prasad of RJD was the winner in this seat beating Vinay Kumar Singh of BJP by a margin of 36396 votes which was 23.2% of the total votes polled in the constituency. In the 2010 Assembly elections, Vinay Kumar Singh of BJP won this seat defeating Rabri Devi of RJD by a margin of 20685 votes which was 17.19% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Dr. Ramanuj Prasad of RJD had a vote share of 43.11% in this seat. In the 2015 Assembly elections, Dr Ramanuj Prasad of RJD got a vote share of 54.87% , In the 2010 Assembly elections, Vinay Kumar Singh of BJP got a vote share of 53.76% in Sonepur.