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

Birendra Kumar Choudhary of Bharatiya Janata Party (BJP) won the seat in the 2014 Lok Sabha elections, defeating Mangani Lal Mandal of the Rashtriya Janata Dal by more than 55.000 votes.
Traditionally, a bastion of the socialists, it was wrested by Birendra Kumar Choudhary in the last elections on the back of the Modi wave of Prime Minister Narendra Modi.
There were 1,650,753 electorate in the Jhanjharpur Lok Sabha Constituency in the 2014 elections, out of which 884,884 are male and the remaining 765,869 are female.
According to the estimates of the 2011 census, out of total 2,05,520 population, there were 1,06,180 males and 99,340 females in Jhanjharpur taluk.
Voter turnout in the 2014 Lok Sabha elections was 57.02%.
Name of the Lok Sabha constituency: Jhanjharpur
State: Bihar
Lok Sabha constituency: Jhanjharpur
Polling date: April 23
2019 candidates: Gulab Yadav (RJD), Ram Preet Mandal (JD-U)
Sitting MP, Party: Birendra Kumar Choudhary, BJP
Winning margin in 2014: 55,408
{{/usCountry}}Winning margin in 2014: 55,408
{{/usCountry}}Runner up name, party: Mangani Lal Mandal, RJD
Number of voters in 2014: 9,41,249
Percentage of votes polled in 2014: 57.02%
Number of polling booths in 2014: 1,529
Number of women voters: 765,869