Purnia Lok Sabha constituency is one of the 40 parliamentary constituencies in Bihar in eastern India.

Santosh Kumar of the Janata Dal United (JD-U) won the seat in the 2014 Lok Sabha elections, defeating Uday Singh of the Bharatiya Janata Party (BJP) by more than 1.16 lakh votes.
There were 1,582,967 electorate in the Purnia Lok Sabha Constituency in the 2014 elections, out of which 833,610 are male and the remaining 749,357 are female.
According to the estimates of the 2011 census, out of total 3,264,619 population, there were 1,699,370 males and 1,565,249 females in Purnia district.
Voter turnout in the 2014 Lok Sabha elections was 64.29%.
Name of the Lok Sabha constituency: Purnia
State: Bihar
Lok Sabha constituency: Purnia
Date of voting: April 18
2019 candidates: Uday Singh (Congress), Santosh Kumar Kushwah JD(U)
Sitting MP, Party: Santosh Kumar, JD(U)
Winning margin in 2014: 1,16,669
Runner up name, party: Uday Singh, BJP
Number of voters in 2014: 10,17,732
Percentage of votes polled in 2014: 64.29%
Number of polling booths in 2014: 1,457
Number of women voters: 749,357
{{/usCountry}}Number of women voters: 749,357
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