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

Madhubani Lok Sabha constituency is held by Union minister Chaudhary Hukumdev Narayan Yadav of Bharatiya Janata Party (BJP). Congress will look to return to its old fort in the 2019 Lok Sabha elections.
There were 1,627,969 electorate in the Madhubani Lok Sabha Constituency in 2014 elections, out of which 877,284 are male and the remaining 750,685 are female.
According to the estimates of the 2011 census, out of total 4,487,379 population, there were 2,329,313 males and 2,158,066 females.
Voter turnout in the 2014 Lok Sabha elections was 52.85%.
Name of the Lok Sabha constituency: Madhubani
State: Bihar
Lok Sabha constituency: Madhubani
Date of voting: May 6
2019 candidates: Ashok Kumar Yadav (BJP), Badrinath Purve (Vikasheel Insaan Party)
Sitting MP, Party: Chaudhary Hukumdev Narayan Yadav, BJP
Winning margin in 2014: 20,535
Runner up name, party: Abdul Bari Siddiqui, RJD
Number of voters in 2014: 8,60,453
Percentage of votes polled in 2014: 1,491
Number of polling booths in 2014: 52.85%
Number of women voters: 750,685
{{/usCountry}}Number of women voters: 750,685
{{/usCountry}}