Hasanpur

The geographic coordinates of Hasanpur Assembly constituency are: 25°43'49.4"N 86°13'49.1"E. This constituency falls in Samastipur district of Bihar and in the Mithila region. Hasanpur shares its borders with five other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Hasanpur are: Cheria Bariarpur, Bakhri, Alauli, Rosera, Kusheshwar Asthan. This constituency shares an inter-state border with .

There were a total of 288306 registered voters on the electoral rolls for the 2025 Assembly election in Hasanpur Assembly constituency, of which 153934 were male, 134370 female and 2 of the third gender. In the 2020 Assembly elections, there were a total of 292161 registered voters, of which 154613 were male, 137540 female and 8 from the third gender. In the 2015 Assembly elections, there were a total of 261721 registered voters, of which 138962 were male, 122750 female and 196 from the third gender. In 2010 elections, there were a total of 223486 registered voters in this constituency, of which 118583 were male and 104903 female and 148 from the third gender.

The number of service voters in this Assembly constituency was 169 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 873, in 2020 it was 890, 883 in 2015, and 885 in 2010.

Hasanpur 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 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 2 on Sunday, October 24, 2010 and the results were declared on Wednesday, November 24, 2010.

Assembly constituency no.140. Hasanpur comprises of the following areas of Samastipur district in the Mithila region of Bihar: CD Blocks Hasanpur & Bithan; Gram Panchayat Kundal-I, KundalII, Shalepur, Jahangirpur & Bishnupur Diha of Singhia CD Block.

This constituency covers an approximate area of 299.86 square kilometers and the geographic coordinates of Hasanpur is: 25°43'49.4"N 86°13'49.1"E.

A total of five Assembly constituencies in the state of Bihar share borders with Hasanpur constituency, which are: Cheria Bariarpur, Bakhri, Alauli, Rosera, Kusheshwar Asthan. 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 Hasanpur constituency was 70.3%. In 2020, this seat registered a turnout of 58.66%, while it was 56.07% in 2015, and 52.22% in 2010.

In the 2020 Bihar Assembly elections, Tej Pratap Yadav of RJD won in this constituency beating Raj Kumar Ray of JDU by a margin of 21139 votes which was 12.34% of the total votes cast. In 2015, Raj Kumar Ray of JDU was the winner in this seat beating Vinod Choudhary of BLSP by a margin of 29600 votes which was 20.17% of the total votes polled in the constituency. In the 2010 Assembly elections, Raj Kumar Ray of JDU won this seat defeating Sunil Kumar Puspam of RJD by a margin of 3291 votes which was 2.82% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Tej Pratap Yadav of RJD had a vote share of 47.27% in this seat. In the 2015 Assembly elections, Raj Kumar Ray of JDU got a vote share of 43% , In the 2010 Assembly elections, Raj Kumar Ray of JDU got a vote share of 31.51% in Hasanpur.