Rosera
Assembly Constituency, Bihar
139. Rosera is one of the 70 Assembly (Vidhan Sabha) constituencies in Bihar. This constituency is located in the Mithila region. Bihar is located in the East region of India. This seat can be classified as: Rural and falls in the Samastipur district of Bihar. The reservation status of this constituency is: Scheduled Caste. 139. Rosera Assembly constituency is part of the 23. Samastipur (Scheduled Caste) Lok Sabha constituency and can be classified as Rural.
Location
The geographic coordinates of Rosera Assembly constituency are: 25°49'07.7"N 86°04'26.0"E. This constituency falls in Samastipur district of Bihar and in the Mithila region. Rosera shares its borders with seven other Assembly constituencies. Other Bihar Assembly constituencies adjacent to Rosera are: Warisnagar, Bibhutipur, Cheria Bariarpur, Hasanpur, Kushehswar Asthan, Gaura Bauram, Benipur. This constituency shares an inter-state border with .
Rosera Assembly election results
Demographic profile
In the 2020 Assembly elections, there were a total of 320615 registered voters, of which 169976 were male, 150411 female and 225 from the third gender. In the 2015 Assembly elections, there were a total of 295959 registered voters, of which 157640 were male, 138314 female and 140 from the third gender. In 2010 elections, there were a total of 248885 registered voters in this constituency, of which 131504 were male and 117381 female and 135 from the third gender.
The number of service voters in this Assembly constituency was 3 in 2020, 5 in 2015, and 0 in 2010.
The electorate gender ratio (number of female voters per 1000 male voters) in this constituency in 2020 was 885, 877 in 2015, and 893 in 2010.
Poll dates
In the 2020 state Assembly elections, this seat voted in Phase 2 on Tuesday, November 3, 2020 and the results were declared on Tuesday, November 10, 2020.
In the 2015 state Assembly elections, this seat voted in Phase 1 on Monday, October 12, 2015 and the results were declared on Sunday, November 8, 2015.
In the 2010 polls, this constituency voted in Phase 2 on Sunday, October 24, 2010 and the results were declared on Wednesday, November 24, 2010.
Extent
Assembly constituency no.139. Rosera comprises of the following areas of Samastipur district in the Mithila region of Bihar: CD Block Rosera; Gram Panchayats Phulhara, Lilhaul, Singhia-I, Singhia-II, Singhia-III, Mahen, Wari, Nirpur Bhaririya, Bangarahta, Hardiya, Mahra, Keothar of Singhia CD Block; Gram Panchayats Shankarpur, Jakhar Dharampur, Ghiwahi, Dasaut, Rahiar North, Rahiar South, Ballipur, Bandhar, Karian South, Raniparti & Rajaur Rambhadrapur of Shivaji Nagar CD Block
This constituency covers an approximate area of 264.4 square kilometers and the geographic coordinates of Rosera is: 25°49'07.7"N 86°04'26.0"E.
A total of seven Assembly constituencies in the state of Bihar share borders with Rosera constituency, which are: Warisnagar, Bibhutipur, Cheria Bariarpur, Hasanpur, Kushehswar Asthan, Gaura Bauram, Benipur. This constituency shares an inter-state border with .
Voter turnout
According to data released by the Election Commission of India, In 2020, this seat registered a turnout of 54.92%, while it was 54.95% in 2015, and 51.39% in 2010.
Total voters
Victory margin
In the 2020 Bihar Assembly elections, Birendra Kumar of BJP won in this constituency beating Nagendra Kumar Vikal of INC by a margin of 35744 votes which was 19.65% of the total votes cast. In 2015, Dr Ashok Kumar of INC was the winner in this seat beating Manju Hazari of BJP by a margin of 34361 votes which was 21.14% of the total votes polled in the constituency. In the 2010 Assembly elections, Manju Hajari of BJP won this seat defeating Pitamber Paswan of RJD by a margin of 12119 votes which was 9.47% of the total votes polled for the seat.
First Published: April 18, 2024, 05:40 IST
Last Updated: October 16, 2025 at 05:11 PM IST
139. Rosera
CONSTITUENCY DETAILS | |
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Reservation status: | Scheduled Caste |
Constituency type: | Rural |
State: | Bihar |
District(s): | Samastipur |
Region (India): | East |
Region (State): | Mithila |
Lok Sabha constituency: | Samastipur |
Alternate name: | Rusera, Rusera Ghat |
2025 ASSEMBLY ELECTIONS | |
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Total voters: | 336479 |
Male voters: | 177414 |
Female voters: | 159064 |
Third gender voters: | 1 |
Electorate gender ratio: | 897 |
Poll phase: | 1 |
Poll date: | November 6, 2025 |
Results (Counting of votes): | November 14, 2025 |
Assembly cons. Results
Cons. name | 2020 | 2015 | 2010 |
---|---|---|---|
Valmiki Nagar | JDU | IND | JDU |
Ramnagar | BJP | BJP | BJP |
Narkatiaganj | BJP | INC | BJP |
Bagaha | BJP | BJP | JDU |
Lauriya | BJP | BJP | IND |
Nautan | BJP | BJP | JDU |
Chanpatia | BJP | BJP | BJP |
Bettiah | BJP | INC | BJP |
Sikta | CPIMLL | JDU | IND |
Raxaul | BJP | BJP | BJP |