Chainpur

The geographic coordinates of Chainpur Assembly constituency are: 24°51'09.4"N 83°32'37.7"E. This constituency falls in Kaimur district of Bihar and in the Bhojpur region. Chainpur shares its borders with three other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Chainpur are: Ramgarh, Bhabua, Chenari. This constituency shares an inter-state border with Uttar Pradesh.

There were a total of 327789 registered voters on the electoral rolls for the 2025 Assembly election in Chainpur Assembly constituency, of which 173802 were male, 153985 female and 2 of the third gender. In the 2020 Assembly elections, there were a total of 318231 registered voters, of which 166135 were male, 152095 female and 1 from the third gender. In the 2015 Assembly elections, there were a total of 288540 registered voters, of which 151961 were male, 136566 female and 326 from the third gender. In 2010 elections, there were a total of 235304 registered voters in this constituency, of which 125066 were male and 110238 female and 247 from the third gender.

The number of service voters in this Assembly constituency was 416 in 2020, 13 in 2015, and 0 in 2010.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2025 was 886, in 2020 it was 915, 899 in 2015, and 881 in 2010.

Chainpur 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 2 on Friday, October 16, 2015 and the results were declared on Sunday, November 8, 2015.

In the 2010 polls, this constituency voted in Phase 6 on Saturday, November 20, 2010 and the results were declared on Wednesday, November 24, 2010.

Assembly constituency no.206. Chainpur comprises of the following areas of Kaimur district in the Bhojpur region of Bihar: CD Blocks Chand, Chainpur, Adhaura & Bhagwanpur

This constituency covers an approximate area of 1748.46 square kilometers and the geographic coordinates of Chainpur is: 24°51'09.4"N 83°32'37.7"E.

A total of three Assembly constituencies in the state of Bihar share borders with Chainpur constituency, which are: Ramgarh, Bhabua, Chenari. This constituency shares an inter-state border with Uttar Pradesh.

According to data released by the Election Commission of India, in the 2025 Bihar Assembly elections, the estimated voter turnout in this Chainpur constituency was 69.3%. In 2020, this seat registered a turnout of 64.75%, while it was 61.63% in 2015, and 60.36% in 2010.

In the 2020 Bihar Assembly elections, Mohd. Zama Khan of BSP won in this constituency beating Brij Kishor Bind of BJP by a margin of 24294 votes which was 11.79% of the total votes cast. In 2015, Brij Kishor Bind of BJP was the winner in this seat beating Mohammad Zama Khan of BSP by a margin of 671 votes which was 0.38% of the total votes polled in the constituency. In the 2010 Assembly elections, Brij Kishor Vind of BJP won this seat defeating Dr. Ajay Alok of BSP by a margin of 13580 votes which was 9.56% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Mohd. Zama Khan of BSP had a vote share of 46.24% in this seat. In the 2015 Assembly elections, Brij Kishor Bind of BJP got a vote share of 33.16% , In the 2010 Assembly elections, Brij Kishor Vind of BJP got a vote share of 32.75% in Chainpur.