Rosera (SC)

Overview & 2025 Context

Rosera, Legislative Assembly number 139 in Samastipur district, produced a landslide verdict in the 2025 Bihar polls. Birendra Kumar of Bharatiya Janata Party (BJP) finished first with 122,773 votes (55.02%), defeating Braj Kishore Ravi (INC), who polled 72,240 (32.37%). The victory margin was 50,533 votes. Of 331,466 electors, 223,194 votes were polled and turnout stood at 67.34%.

The 2025 Bihar Legislative Assembly election was a bipolar contest between the NDA and the Mahagathbandhan. Campaign discourse centred on unemployment, youth out-migration, welfare delivery, women’s schemes, caste arithmetic, and competing claims on jobs versus market-led growth, as reported across major coverage of the polls. In this Assembly Constituency, the local verdict hinged on candidate networks and booth-level conversion as much as alliance symbols. Leading contenders by votes included: Birendra Kumar (BJP, 122,773 / 55.02%); Braj Kishore Ravi (INC, 72,240 / 32.37%); Rohit Kumar (Jan Suraaj, 14,913 / 6.68%); Rajesh Kumar Paswan (IND, 3,885 / 1.74%).

Campaign noise statewide does not erase the arithmetic of this Legislative Assembly segment: the gap between Birendra Kumar and Braj Kishore Ravi is the binding fact for seat 139, and every other claim about caste blocs or welfare messaging has to be tested against that published margin of 50,533 votes.

Geographical & Administrative Profile

Samastipur sits between the Mithila and Bagmati-influenced tracts of north Bihar, with rail-road junctions and dense agricultural blocks. Administratively, Rosera is Assembly Constituency number 139 under Samastipur (headquarters: Samastipur). Like neighbouring segments, it mixes rural habitations and market nodes where roads, schools, health access and welfare delivery travel with voters as strongly as statewide narratives.

Geography here is not ornamental for election reading. Flood plains, market roads and block headquarters shape who can mobilise, who migrates for work, and which booth clusters decide close Assembly Constituency contests. Rosera sits inside that Samastipur administrative map even when national television talks only of alliances.

History & Past Election Trends

On the same constituency lineage, recent Legislative Assembly outcomes were — 2020: Birendra Kumar (BJP) by 35,744 votes; 2015: DR. ASHOK KUMAR (INC) by 34,361 votes; 2010: MANJU HAJARI (BJP) by 12,119 votes; 2005: GAJENDRA PRASAD SINGH (RJD) by 14,922 votes.

Against that backdrop, the 2025 win for Birendra Kumar (BJP) in Legislative Assembly seat number 139 should be read as continuity where the same camp had dominated, or as another swing where the lineage had flipped before — never by treating the serial number alone as eternal identity.

Statistics & Gender-wise Polling Analysis

Electors: 331,466. Votes polled: 223,194. Turnout: 67.34%. Winner Birendra Kumar (BJP): 122,773 (55.02%); runner-up Braj Kishore Ravi (INC): 72,240 (32.37%); margin: 50,533 — a landslide verdict relative to total votes polled in this Assembly Constituency.

Women slightly outnumbered men among recorded voters: male 105,717 (47.51%), female 116,813 (52.49%), other 1.

Turnout 67.34% with 223,194 votes from 331,466 electors remains the participation baseline for comparing this seat with neighbouring Legislative Assembly segments in Samastipur.

Issues That Drove Voting Behavior

Statewide themes included jobs and migration, welfare and women-centric schemes, caste coalitions, governance/law-and-order messaging, and local delivery of roads, flood control and farm support. In Samastipur, voters also weighed farm prices, flood drainage, railway-town employment. a landslide verdict for Birendra Kumar (BJP) against Braj Kishore Ravi (INC) suggests the winner’s camp converted a broader preference in seat 139.

None of those themes automatically explain every booth. The usable conclusion for Rosera is narrower: Birendra Kumar (BJP) outpolled Braj Kishore Ravi (INC) by 50,533 votes under 67.34% turnout, and that is the 2025 mandate recorded for Assembly Constituency number 139.

Reading 2025 carefully means separating statewide wave talk from booth-level conversion in Rosera. Birendra Kumar (BJP) converted 122,773 votes; Braj Kishore Ravi (INC) had 72,240. Turnout 67.34% and margin 50,533 in seat 139 signal organisational reach across polling stations rather than a single-day mood swing alone.

For journalists and researchers, the safer frame is lineage continuity plus the published 2025 table: electors 331,466, votes polled 223,194, and the head-to-head between Birendra Kumar and Braj Kishore Ravi. District cues in Samastipur still matter — roads, floods, farm prices, migration and welfare delivery — but they must be weighed against what the EVM count actually recorded in this Assembly Constituency / Legislative Assembly seat.