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Assembly constituency 158 · Bihar

Nathnagar is assembly constituency number 158 in Bihar, in Bhagalpur district, and one of the segments of the Bhagalpur Lok Sabha seat. In the 2025 election Mithun Kumar of the Lok Janshakti Party (Ram Vilas) won with 48.9% of the vote, 25,424 votes ahead of Sheikh Zeyaul Hassan (RJD).

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Nathnagar · 2025AC 158
  1. 01
    Mithun Kumar
    LJPRV
    1,18,143
    48.92%
  2. 02
    Sheikh Zeyaul Hassan
    RJD
    92,719
    38.39%
  3. 03
    Md Ismail
    AIMIM
    8,226
    3.41%
  4. 04
    Ajay Kumar Roy
    JNSRJP
    5,233
    2.17%
  5. 05
    Sharada Devi
    Independent
    3,434
    1.42%
  6. 10 other candidates · 8,542 votesNOTA · 5,203 (2.15%)

Margin 25,424 votes · 10.53% of valid votes

3,37,948
Registered electors
2025 election
71.5%
Turnout
+11.6 pts vs 2020
25,424
Victory margin
10.5% of valid votes
Nov 2025 · candidate-wise result

All 15 candidates, ranked by votes. Vote share is of the 2,41,500 valid votes, NOTA included.

Nathnagar 2025 assembly election result
#CandidatePartyVotesVote share
1Mithun KumarMale · 39 yrsLJPRV1,18,143
48.92%
2Sheikh Zeyaul HassanMale · 58 yrsRJD92,719
38.39%
3Md IsmailMale · 42 yrsAIMIM8,226
3.41%
4Ajay Kumar RoyMale · 45 yrsJNSRJP5,233
2.17%
—NOTANOTA5,203
2.15%
5Sharada DeviFemale · 70 yrsIndependent3,434
1.42%
6Ravish Chandra Ravi KushwahaMale · 42 yrsBSP1,998
0.83%
7Shanij KumarMale · 35 yrsIndependent1,648
0.68%
Show 8 more candidates
8Jai Prakash MandalMale · 65 yrsIndependent1,423
0.59%
9Sudhir KumarMale · 60 yrsIndependent1,002
0.41%
10Chetan RamMale · 58 yrsIndependent568
0.24%
11Jaykaran PaswanMale · 39 yrs · SCIndependent465
0.19%
12Aravind MandalMale · 40 yrsIndependent457
0.19%
13Dayaram MandalMale · 48 yrsIndependent420
0.17%
14Sushil Prasad YadavMale · 60 yrsPPID344
0.14%
15Md Manzar AlamMale · 55 yrsBPL217
0.09%
Past results

The seat changed hands: RJD won in 2020, LJPRV in 2025.

0%10%20%30%40%50%2010201520202025LJPRV 48.9%RJD 38.4%AIMIM 3.4%JD(U) 36.4%
Vote share, % of valid votes. Hover or focus a year for exact values.
2025Mithun KumarLJPRV · 48.9% · margin 25,424Turnout71.5%
2020Ali Ashraf SiddiquiRJD · 40.4% · margin 7,756Turnout59.8%
2019 byeLakshmikant MandalJD(U) · 37.3% · margin 5,131Turnout47.2%
2015Ajay Kumar MandalJD(U) · 39.2% · margin 7,825Turnout56.5%
2010Ajai Kumar MandalJD(U) · 34.4% · margin 4,727Turnout50.3%

General elections since the 2008 delimitation, plus bye-elections (dashed). Results from before the current boundaries are not compared.

Nathnagar bye-election, 21 Oct 2019

Turnout 47.2% · 1,49,974 of 3,17,530 electors voted

Nathnagar bye-election 2019-10-21 result
#CandidatePartyVotesVote share
1Lakshmikant MandalJD(U)55,981
37.33%
2Rabiya KhatunRJD50,850
33.91%
3Ashok KumarIndependent13,446
8.97%
4Ajay Kumar RoyHAMS6,315
4.21%
—NOTANOTA4,315
2.88%
5Sudhir SharmaCPI3,046
2.03%
Show 9 more candidates
6Abhay KumarIndependent2,683
1.79%
7Raju YadavIndependent2,559
1.71%
8Birbal KumarIndependent2,165
1.44%
9Ranjan Kumar SinghRSPSR1,929
1.29%
10Pawan Kumar SahIndependent1,865
1.24%
11Dolly KumariVCSMP1,570
1.05%
12Manzar AlamIndependent1,455
0.97%
13Jay Karan PaswanIndependent1,197
0.80%
14Dayaram MandalBDlP569
0.38%

Nathnagar result 2020

Nathnagar 2020 result
#CandidatePartyVotesVote share
1Ali Ashraf SiddiquiRJD78,832
40.41%
2Lakshmi Kant MandalJD(U)71,076
36.44%
3Amar Nath Prasad @ Amar Singh KushwahaLJP14,715
7.54%
4Ashok KumarBSP9,659
4.95%
5Gouri Shankar SinghIndependent2,372
1.22%
6Ajay Kumar MandalBPL2,319
1.19%
Show 13 more candidates
7Bhuneshwar MandalIndependent2,299
1.18%
8Brahamdev PaswanIndependent2,162
1.11%
9Anuj KumarIndependent2,078
1.07%
10Narottam SrivastavaIndependent1,527
0.78%
—NOTANOTA1,201
0.62%
11Shailendra KumarIndependent1,183
0.61%
12Sanjay KumarIndependent1,111
0.57%
13Mohammad Akbar AliNCP1,087
0.56%
14Gautam PanjiyaraRTMNSWP933
0.48%
15Kumari AshaTPLRSP739
0.38%
16Shiv Shankar SharmaLGJNPSCL695
0.36%
17Zafar MustafaJAPL660
0.34%
18Pawan Kumar SahBJKD416
0.21%

Nathnagar result 2015

Nathnagar 2015 result
#CandidatePartyVotesVote share
1Ajay Kumar MandalJD(U)66,485
39.16%
2Amar Nath Prasad Alies Amar Singh KushwahaLJP58,660
34.55%
3Abu QaiserJAPL8,725
5.14%
4Om Prakash YadavIndependent7,420
4.37%
—NOTANOTA7,172
4.22%
5Manohar Kumar MandalCPI(M)5,682
3.35%
Show 8 more candidates
6Sanjay Kumar Alies Pappu YadavIndependent4,460
2.63%
7Diwakar Chandra DubeySP2,534
1.49%
8Birendra Prasad SinghBJHP2,342
1.38%
9Sandip Kumar SharmaGJDS1,873
1.10%
10Mohammad RijbiBSP1,357
0.80%
11Upender MandalNTP1,110
0.65%
12Deepak KumarSUCI983
0.58%
13Upendra Prasad DasSKLP959
0.56%

Nathnagar result 2010

Nathnagar 2010 result
#CandidatePartyVotesVote share
1Ajai Kumar MandalJD(U)42,094
34.43%
2Abu KaisharRJD37,367
30.57%
3Parwez JamalINC16,623
13.60%
4Diwakar Chandara DubeyIndependent6,738
5.51%
5Kedar Nath YadavBSP4,757
3.89%
6Shailendra Kumar GhoshIndependent4,280
3.50%
Show 9 more candidates
7Usha KumariJPS2,403
1.97%
8Shital MandalIndependent1,969
1.61%
9Utam KumarIndependent1,518
1.24%
10MumtazANC954
0.78%
11Anil MandalIndependent892
0.73%
12Rabiran SinghIndependent846
0.69%
13Murlidhar SinghIndependent766
0.63%
14Jitendra Prasad YadavSP594
0.49%
15Sri Niwas KumarShiv Sena450
0.37%
Map

Nathnagar outlined in orange among the other Bihar seats, coloured by the party that won each in 2025. Click any seat to open its page.

Other seats in Bhagalpur district

Boundaries are approximate (DataMeet, from ECI polling-station maps) and are for orientation only.

BJPJD(U)RJDLJPRVINCAIMIMOthers
Lok Sabha 2024 in this segment

Nathnagar is one of the assembly segments of Bhagalpur. These are the EVM votes counted in this segment for the leading Bhagalpur candidates.

  • Ajay Kumar MandalJD(U)95,741 49.9%
  • Ajeet SharmaINC84,943 44.3%
  • Hareram YadavIndependent2,300 1.2%
  • Poonam SinghBSP2,194 1.1%
  • Deepak Kumar SinghRJBP1,009 0.5%

In the assembly election LJPRV won this seat. In the Lok Sabha vote, JD(U) led here by 10,798 EVM votes.

Open Bhagalpur Lok Sabha result
Data & field work for this seat

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FAQ

Answers use the official Election Commission of India results for Nathnagar.

Who won the Nathnagar assembly seat in 2025?

Mithun Kumar of the Lok Janshakti Party (Ram Vilas) (LJPRV) won Nathnagar in the 2025 Bihar assembly election with 1,18,143 votes, which was 48.92% of the valid votes polled.

What was the victory margin in Nathnagar?

The margin was 25,424 votes (10.53% of valid votes). The runner-up was Sheikh Zeyaul Hassan of the Rashtriya Janata Dal with 92,719 votes.

What was the voter turnout in Nathnagar in 2025?

Turnout was 71.47%: 2,41,517 of 3,37,948 registered electors voted, across 418 polling stations. That is 11.6 points higher than in 2020.

Which Lok Sabha constituency is Nathnagar part of?

Nathnagar is an assembly segment of the Bhagalpur Lok Sabha constituency in Bihar. In the 2024 Lok Sabha election, Ajay Kumar Mandal got the most EVM votes in this segment.

Has Nathnagar had a bye-election?

Yes. In the bye-election on 21 Oct 2019, Lakshmikant Mandal (Janata Dal (United)) won by 5,131 votes.

Is Nathnagar a reserved constituency?

No. Nathnagar is a general (unreserved) seat, so any eligible candidate can contest.

When is the next assembly election in Nathnagar?

The Bihar assembly elected in 2025 completes its five-year term in 2030, so the next general election is due by then unless the assembly is dissolved early. The Election Commission of India announces the exact schedule.

Source: Election Commission of India, statistical reports for the Bihar assembly elections of 2025 and 2020 and 2015 and 2010 (2025 report) — detailed results and constituency data summary. Lok Sabha figures: ECI 2024 report 34, assembly segment details. Vote share is of valid votes including NOTA. Party names as listed by ECI. Candidate names are shown as filed; spelling follows ECI.

Related data

Each page below is built from an official source and credited on the page.