Dhamdaha

The geographic coordinates of Dhamdaha Assembly constituency are: 25°45'59.0"N 87°16'50.2"E. This constituency falls in Purnia district of Bihar and in the Koshi region. Dhamdaha shares its borders with five other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Dhamdaha are: Kasba, Baisi, Kasba, Manihari, Purnia. This constituency shares an inter-state border with .

There were a total of 312770 registered voters on the electoral rolls for the 2025 Assembly election in Dhamdaha Assembly constituency, of which 162940 were male, 149817 female and 13 of the third gender. In the 2020 Assembly elections, there were a total of 315754 registered voters, of which 163101 were male, 152646 female and 7 from the third gender. In the 2015 Assembly elections, there were a total of 290121 registered voters, of which 150118 were male, 139996 female and 135 from the third gender. In 2010 elections, there were a total of 236569 registered voters in this constituency, of which 123817 were male and 112752 female and 61 from the third gender.

The number of service voters in this Assembly constituency was 198 in 2020, 7 in 2015, and 0 in 2010.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2025 was 919, in 2020 it was 936, 933 in 2015, and 911 in 2010.

Dhamdaha 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 3 on Saturday, November 7, 2020 and the results were declared on Tuesday, November 10, 2020.

In the 2015 state Assembly elections, this seat voted in Phase 5 on Thursday, November 5, 2015 and the results were declared on Sunday, November 8, 2015.

In the 2010 polls, this constituency voted in Phase 1 on Thursday, October 21, 2010 and the results were declared on Wednesday, November 24, 2010.

Assembly constituency no.61. Dhamdaha comprises of the following areas of Purnia district in the Koshi region of Bihar: CD Block Dhamdaha; Gram Panchayats Banbhag Chunapur, Bithnouli Khemchand East, Bithnouli Khemchand West, Ganeshpur, Gangaili, Gowasi, Kajha, Majra, Parora, Rahuwa, Sahara, Satkodariya, Gokulpur, Jagni & Pothia Rampur of Krityanand Nagar CD Block.

This constituency covers an approximate area of 583.14 square kilometers and the geographic coordinates of Dhamdaha is: 25°45'59.0"N 87°16'50.2"E.

A total of five Assembly constituencies in the state of Bihar share borders with Dhamdaha constituency, which are: Kasba, Baisi, Kasba, Manihari, Purnia. 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 Dhamdaha constituency was 76.65%. In 2020, this seat registered a turnout of 63.39%, while it was 65.28% in 2015, and 61.77% in 2010.

In the 2020 Bihar Assembly elections, Leshi Singh of JDU won in this constituency beating Dilip Kumar Yadav of RJD by a margin of 33594 votes which was 16.79% of the total votes cast. In 2015, Leshi Singh of JDU was the winner in this seat beating Shiv Shankar Thakur Allias Shankar Azad of BLSP by a margin of 30291 votes which was 16% of the total votes polled in the constituency. In the 2010 Assembly elections, Leshi Singh of JDU won this seat defeating of INC by a margin of 44697 votes which was 30.59% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Leshi Singh of JDU had a vote share of 48.5% in this seat. In the 2015 Assembly elections, Leshi Singh of JDU got a vote share of 40.15% , In the 2010 Assembly elections, Leshi Singh of JDU got a vote share of 44.02% in Dhamdaha.