Paschim Champaran Lok Sabha constituency is one of the 40 parliamentary constituencies in Bihar in eastern India. This constituency came into existence in 2008, following delimitation of the parliamentary constituencies based on the recommendations of the Delimitation Commission of India constituted in 2002.

Paschim Champaran Lok Sabha constituency has been a bastion of the Bharatiya Janata Party (BJP), with its Dr Sanjay Jaiswal holding the seat since 2009 Lok Sabha elections.
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There were 1,413,073 electorate in the Paschim Champaran Lok Sabha Constituency in 2014 elections, out of which 769,352 are male and the remaining 385,686 are female.
The district headquarters are located in Bettiah. The district is known for its fluid border with Nepal. According to the estimates of the 2011 census, out of total 3,935,042 population, there were 2,061,110 male and 1,873,932.
Voter turnout in the 2014 Lok Sabha elections was 60.49%.
Name of the Lok Sabha constituency: Paschim Champaran
State: Bihar
{{/usCountry}}State: Bihar
{{/usCountry}}Lok Sabha constituency: Paschim Champaran
2019 candidates: Dr. Sanjay Jaiswal (BJP), Brajesh kumar Kushwaha (RLSP)
Sitting MP, Party: Dr. Sanjay Jaiswal, BJP
Winning margin in 2014: 28,292
Runner up name, party: Misha Bharti, RJD
Number of voters in 2014: 1,413,073
Percentage of votes polled in 2014: 60%
Number of polling booths in 2014: 1276
Number of women voters: 643,721