Katihar

The geographic coordinates of Katihar Assembly constituency are: 25°33'25.9"N 87°35'31.6"E. This constituency falls in Katihar district of Bihar and in the Koshi region. Katihar shares its borders with six other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Katihar are: Purnia, Kadwa, Korha, Barari, Balrampur, Pranpur . This constituency shares an inter-state border with .

There were a total of 260755 registered voters on the electoral rolls for the 2025 Assembly election in Katihar Assembly constituency, of which 135099 were male, 125653 female and 3 of the third gender. In the 2020 Assembly elections, there were a total of 273824 registered voters, of which 140508 were male, 133302 female and 14 from the third gender. In the 2015 Assembly elections, there were a total of 242829 registered voters, of which 129571 were male, 113247 female and 373 from the third gender. In 2010 elections, there were a total of 208316 registered voters in this constituency, of which 112467 were male and 95849 female and 259 from the third gender.

The number of service voters in this Assembly constituency was 408 in 2020, 11 in 2015, and 0 in 2010.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2025 was 930, in 2020 it was 949, 874 in 2015, and 852 in 2010.

Katihar 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.63. Katihar comprises of the following areas of Katihar district in the Koshi region of Bihar: CD Blocks Katihar & Hasanganj.

This constituency covers an approximate area of 179.51 square kilometers and the geographic coordinates of Katihar is: 25°33'25.9"N 87°35'31.6"E.

A total of six Assembly constituencies in the state of Bihar share borders with Katihar constituency, which are: Purnia, Kadwa, Korha, Barari, Balrampur, Pranpur . 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 Katihar constituency was 75.59%. In 2020, this seat registered a turnout of 62.33%, while it was 63.3% in 2015, and 60.17% in 2010.

In the 2020 Bihar Assembly elections, Tarkishore Prasad of BJP won in this constituency beating Dr. Ram Prakash Mahto of RJD by a margin of 10519 votes which was 6.17% of the total votes cast. In 2015, Tarkishore Prasad of BJP was the winner in this seat beating Bijay Singh of JDU by a margin of 14894 votes which was 9.69% of the total votes polled in the constituency. In the 2010 Assembly elections, Tar Kishore Prasad of BJP won this seat defeating of RJD by a margin of 20607 votes which was 16.45% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Tarkishore Prasad of BJP had a vote share of 48.47% in this seat. In the 2015 Assembly elections, Tarkishore Prasad of BJP got a vote share of 42.98% , In the 2010 Assembly elections, Tar Kishore Prasad of BJP got a vote share of 46.87% in Katihar.