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Bharat Surveyभारत सर्वे
Assembly constituency 139 · Bihar · SC

Rosera is assembly constituency number 139 in Bihar, in Samastipur district, and one of the segments of the Samastipur Lok Sabha seat. In the 2025 election Birendra Kumar of the Bharatiya Janata Party won with 55.0% of the vote, 50,533 votes ahead of Braj Kishore Ravi (INC).

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Rosera · 2025AC 139
  1. 01
    Birendra Kumar
    BJP
    1,22,773
    55.02%
  2. 02
    Braj Kishore Ravi
    INC
    72,240
    32.37%
  3. 03
    Rohit Kumar
    JNSRJP
    14,913
    6.68%
  4. 04
    Rajesh Kumar Paswan
    Independent
    3,885
    1.74%
  5. 05
    Devendra Kumar Paswan
    BTMSP
    3,574
    1.60%
  6. 1 other candidate · 2,748 votesNOTA · 3,016 (1.35%)

Margin 50,533 votes · 22.65% of valid votes

3,31,466
Registered electors
2025 election
67.3%
Turnout
+12.2 pts vs 2020
50,533
Victory margin
22.6% of valid votes
Nov 2025 · candidate-wise result

All 6 candidates, ranked by votes. Vote share is of the 2,23,149 valid votes, NOTA included.

Rosera 2025 assembly election result
#CandidatePartyVotesVote share
1Birendra KumarMale · 49 yrs · SCBJP1,22,773
55.02%
2Braj Kishore RaviMale · 61 yrs · SCINC72,240
32.37%
3Rohit KumarMale · 26 yrs · SCJNSRJP14,913
6.68%
4Rajesh Kumar PaswanMale · 43 yrs · SCIndependent3,885
1.74%
5Devendra Kumar PaswanMale · 38 yrs · SCBTMSP3,574
1.60%
—NOTANOTA3,016
1.35%
6Amit Kumar BaithaMale · 31 yrs · SCBSP2,748
1.23%
Past results

BJP held the seat: it also won in 2020.

0%20%40%60%2010201520202025BJP 55.0%INC 32.4%JNSRJP 6.7%LJP 12.6%
Vote share, % of valid votes. Hover or focus a year for exact values.
2025Birendra KumarBJP · 55.0% · margin 50,533Turnout67.3%
2020Birendra KumarBJP · 47.9% · margin 35,744Turnout55.1%
2015Dr. Ashok KumarINC · 52.6% · margin 34,361Turnout55.0%
2010Manju HajariBJP · 45.3% · margin 12,119Turnout51.4%

General elections since the 2008 delimitation. Results from before the current boundaries are not compared.

Rosera result 2020

Rosera 2020 result
#CandidatePartyVotesVote share
1Birendra KumarBJP87,163
47.93%
2Nagendra Kumar VikalINC51,419
28.27%
3Krishan RajLJP22,995
12.64%
—NOTANOTA5,284
2.91%
4Shrawan KumarIndependent4,191
2.30%
5Surendra DasIndependent3,556
1.96%
Show 7 more candidates
6Vijay Kumar RamBSP1,665
0.92%
7Shailendra ChaudhariIndependent1,649
0.91%
8Shashi Bhushan DasRSTJNVKSP1,315
0.72%
9Vikram RajakLJD810
0.45%
10Randhir Kumar PaswanTPLRSP693
0.38%
11Asha DeviAAM578
0.32%
12Vidya Nand RamWAP546
0.30%

Rosera result 2015

Rosera 2015 result
#CandidatePartyVotesVote share
1Dr. Ashok KumarINC85,506
52.59%
2Manju HazariBJP51,145
31.46%
3Indal PaswanCPI9,543
5.87%
—NOTANOTA5,841
3.59%
4Surendra DasRVNP2,355
1.45%
5Arun RamIndependent2,315
1.42%
Show 5 more candidates
6Ram Bahadur AzadIndependent1,783
1.10%
7Baleshwar PaswanBSP1,610
0.99%
8Shatrudhan Kumar PaswanSP975
0.60%
9Vijay Laxmy DeviNJPI769
0.47%
10Baidyanath KumarGJDS736
0.45%

Rosera result 2010

Rosera 2010 result
#CandidatePartyVotesVote share
1Manju HajariBJP57,930
45.29%
2Pitamber PaswanRJD45,811
35.82%
3Sarita DeviINC13,914
10.88%
4Suresh RamRPP4,369
3.42%
5Bibha DeviBSP3,011
2.35%
6Aashish Kumar ParasIJP2,873
2.25%
Map

Rosera 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 Samastipur district

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

BJPJD(U)RJDLJPRVINCAIMIMOthers
Lok Sabha 2024 in this segment

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

  • ShambhaviLJPRV1,12,870 58.9%
  • Sunny HazariINC60,948 31.8%
  • Shashi Bhushan DasIndependent5,741 3.0%
  • Ravi Raushan KumarIndependent2,877 1.5%
  • Ram Lakhan MahtoBSP2,382 1.2%

In the assembly election BJP won this seat. In the Lok Sabha vote, LJPRV led here by 51,922 EVM votes.

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

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FAQ

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

Who won the Rosera assembly seat in 2025?

Birendra Kumar of the Bharatiya Janata Party (BJP) won Rosera in the 2025 Bihar assembly election with 1,22,773 votes, which was 55.02% of the valid votes polled.

What was the victory margin in Rosera?

The margin was 50,533 votes (22.65% of valid votes). The runner-up was Braj Kishore Ravi of the Indian National Congress with 72,240 votes.

What was the voter turnout in Rosera in 2025?

Turnout was 67.34%: 2,23,194 of 3,31,466 registered electors voted, across 413 polling stations. That is 12.2 points higher than in 2020.

Which Lok Sabha constituency is Rosera part of?

Rosera is an assembly segment of the Samastipur Lok Sabha constituency in Bihar. In the 2024 Lok Sabha election, Shambhavi got the most EVM votes in this segment.

Is Rosera a reserved constituency?

Yes. Rosera is reserved for scheduled castes (sc), so only candidates from that community can contest, while all registered voters in the seat can vote.

When is the next assembly election in Rosera?

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.