Riga

The geographic coordinates of Riga Assembly constituency are: 26°39'46.1"N 85°21'51.1"E. This constituency falls in Sitamarhi district of Bihar and in the Tirhut region. Riga shares its borders with six other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Riga are: Dhaka, Chiraia, Sheohar, Belsand, Sitamarhi, Bathnaha. This constituency shares an inter-state border with Nepal.

There were a total of 315702 registered voters on the electoral rolls for the 2025 Assembly election in Riga Assembly constituency, of which 168921 were male, 146776 female and 5 of the third gender. In the 2020 Assembly elections, there were a total of 312648 registered voters, of which 166497 were male, 146137 female and 14 from the third gender. In the 2015 Assembly elections, there were a total of 282472 registered voters, of which 150838 were male, 131620 female and 252 from the third gender. In 2010 elections, there were a total of 229978 registered voters in this constituency, of which 122743 were male and 107235 female and 150 from the third gender.

The number of service voters in this Assembly constituency was 285 in 2020, 14 in 2015, and 0 in 2010.

The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2025 was 869, in 2020 it was 878, 873 in 2015, and 874 in 2010.

Riga 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 4 on Sunday, November 1, 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.23. Riga comprises of the following areas of Sitamarhi district in the Tirhut region of Bihar: CD Blocks Bairgania, Suppi & Riga.

This constituency covers an approximate area of 274.76 square kilometers and the geographic coordinates of Riga is: 26°39'46.1"N 85°21'51.1"E.

A total of six Assembly constituencies in the state of Bihar share borders with Riga constituency, which are: Dhaka, Chiraia, Sheohar, Belsand, Sitamarhi, Bathnaha. This constituency shares an inter-state border with Nepal.

According to data released by the Election Commission of India, in the 2025 Bihar Assembly elections, the estimated voter turnout in this Riga constituency was 68.3%. In 2020, this seat registered a turnout of 57.43%, while it was 57.32% in 2015, and 53.06% in 2010.

In the 2020 Bihar Assembly elections, Moti Lal Prasad of BJP won in this constituency beating Amit Kumar of INC by a margin of 32495 votes which was 18.11% of the total votes cast. In 2015, Amit Kumar of INC was the winner in this seat beating Moti Lal Prasad of BJP by a margin of 22856 votes which was 14.13% of the total votes polled in the constituency. In the 2010 Assembly elections, Motilal Prasad of BJP won this seat defeating Amit Kumar of INC by a margin of 22327 votes which was 18.3% of the total votes polled for the seat.

In the 2020 Bihar Assembly elections, Moti Lal Prasad of BJP had a vote share of 53.07% in this seat. In the 2015 Assembly elections, Amit Kumar of INC got a vote share of 48.97% , In the 2010 Assembly elections, Motilal Prasad of BJP got a vote share of 39.86% in Riga.