Harnaut

The geographic coordinates of Harnaut Assembly constituency are: 25°22'08.4"N 85°27'43.2"E. This constituency falls in Nalanda district of Bihar and in the Magadh region. Harnaut shares its borders with six other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Harnaut are: Bakhtiarpur, Barh, Asthawan, Biharsharif, Nalanda, Hilsa. This constituency shares an inter-state border with .

There were a total of 317971 registered voters on the electoral rolls for the 2025 Assembly election in Harnaut Assembly constituency, of which 167923 were male, 150042 female and 6 of the third gender. In the 2020 Assembly elections, there were a total of 308138 registered voters, of which 162536 were male, 145594 female and 8 from the third gender. In the 2015 Assembly elections, there were a total of 287953 registered voters, of which 152860 were male, 135083 female and 361 from the third gender. In 2010 elections, there were a total of 242011 registered voters in this constituency, of which 130005 were male and 112006 female and 266 from the third gender.

The number of service voters in this Assembly constituency was 643 in 2020, 10 in 2015, and 0 in 2010.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2025 was 894, in 2020 it was 896, 884 in 2015, and 862 in 2010.

Harnaut 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 5 on Tuesday, November 9, 2010 and the results were declared on Wednesday, November 24, 2010.

Assembly constituency no.177. Harnaut comprises of the following areas of Nalanda district in the Magadh region of Bihar: CD Blocks Harnaut, Chandi & Nagar Nausa.

This constituency covers an approximate area of 371.05 square kilometers and the geographic coordinates of Harnaut is: 25°22'08.4"N 85°27'43.2"E.

A total of six Assembly constituencies in the state of Bihar share borders with Harnaut constituency, which are: Bakhtiarpur, Barh, Asthawan, Biharsharif, Nalanda, Hilsa. 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 Harnaut constituency was 59.12%. In 2020, this seat registered a turnout of 51.99%, while it was 54.44% in 2015, and 49.63% in 2010.

In the 2020 Bihar Assembly elections, Hari Narayan Singh of JDU won in this constituency beating Mamta Devi of LJP by a margin of 27241 votes which was 17.18% of the total votes cast. In 2015, Hari Narayan Singh of JDU was the winner in this seat beating Arun Kumar of LJP by a margin of 14295 votes which was 9.12% of the total votes polled in the constituency. In the 2010 Assembly elections, Harinarayan Singh of JDU won this seat defeating Arun Kumar of LJP by a margin of 15042 votes which was 12.52% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Hari Narayan Singh of JDU had a vote share of 41.24% in this seat. In the 2015 Assembly elections, Hari Narayan Singh of JDU got a vote share of 45.91% , In the 2010 Assembly elections, Harinarayan Singh of JDU got a vote share of 47.32% in Harnaut.