| Name of the Candidate | Party Name | Result |
| VINAY VARMA | Indian National Congress | 57212 |
| RENU DEVI | Bharatiya Janata Party | 41151 |
| RASHMI VERMA | Independent | 39200 |
| RAMBHAJU MAHATO | Independent | 2262 |
| NAUSHAD ALAM | Bahujan Samaj Party | 2124 |
| SHAILESH MISHRA | Independent | 1666 |
| PREM NARAYAN OJHA | Shivsena | 1431 |
| UMESH YADAW | Samajwadi Party | 1359 |
| BHOT CHATURVEDI | Independent | 1076 |
| RAMESH PASWAN | Independent | 1072 |
| MANISH ALAM | Nationalist Congress Party | 967 |
| OM SHANTI BABA | Bharatiya Ekta Dal | 956 |
| MUKHTAR MIYAN | Communist Party of India (Marxist-Leninist) (Liberation) | 799 |
| VINAY SAH | Independent | 725 |
| MERAJ AHMAD | Janta Dal Rashtravadi | 432 |
| NATHU RAVI | Bahujan Mukti Party | 399 |
| None of the Above | None of the Above | 740 |
| AC No | Category | Poll Phases | Last Date of Nominations | Date of Polls | Result |
| 3 | GEN | Phase IV | Oct 7th 2015 | Nov 1st 2015 | Nov 8th 2015 |
Narkatiaganj assembly constituency is in western Champaran district. It is part of Valmiki Nagar Lok Sabha constituency. It comprises of Dhumnagar, Shikarpur, Hardi Tedha, Semari, Manwa Parsi, Chamua, Nautanwa, Dumaria, Binawalia, Maldahiya Pokhariya, Kehunia Roari, Parorahan, Purainia Harsari, Rajpur Tumkaria, Sugauli, Kundilpur, Bheriharwa, Gokhula, Kesharia, Kukura, Serahwa, Rakahi Champapur, Banwaria, Bhasurari gram panchayats and Narkatiaganj notified area of Narkatiganj community development block; Telpur, Deurawa, Bagahi Basawaria, Dhobini, Gonauli Dumra and Lakar Sisai gram panchayats of Lauriya CD Block.
One of the nine assembly segments located in the Paschim Champaran district of Bihar, Narkatiaganj assembly constituency is currently being represented by Rashmi Verma who retained the seat for the BJP by defeating her nearest Congress rival Fakhruddin Khan by a margin of 15,742 votes in a byepoll held on 21st August in 2014, necessitated due to the election of its sitting BJP MLA Satish Chandra Dubey to the Lok Sabha from the Valmiki Nagar parliamentary constituency. While Rashmi Verma got 64,602 votes, Fakhruddin Khan got 48,860 votes.
Out of the ten assembly seats that went to the polls in the bye-elections which took place after the Lok Sabha elections, the BJP won 6 whereas the RJD and the JD(U) was victorious on 3 and 2 seats respectively. The Congress won one seats.
In 2010, while the congress had won only four seats in Bihar, the BJP which contested the elections in alliance with the JD (U) managed to claim 91 seats, while the latter emerged victorious from 115 constituencies. The RJD put up a dismal performance with only 22 seats. However, as things stand today, the BJP and the JD (U) have parted ways and the Lok Janashakti Party (LJP), the ally of the RJD in the last assembly elections, is now a part of the BJP led NDA, the ruling dispensation at the Centre. The RJD, the JD (U) and the Congress have come together to stop the BJP from coming to power in Bihar.
Earlier Narkatiaganj assembly constituency, which came into being before the last general assembly elections in Bihar in 2010, was won in that year by Satish Chandra Dubey who had defeated Alok Prasad Verma of the Congress by a margin of 20228 votes. While 45022 votes were polled in favour of Satish Chandra Dubey, Alok Prasad Verma, husband of Rashmi Verma, received 24794 votes and was closely followed by Fakhruddin Khan, then an Independent candidate, with 22381 votes. Majhar Alam, who entered the contest on the Lalu Prasad led Rrashtriya Janata Dal (RJD), came fourth with 8243 votes.
Narkatiaganj is one of the six assembly constituencies that combine to form the parliamentary constituency of Valmiki Nagar which is currently represented by Satish Chandra Dubey of the BJP who won the seat by defeating his nearest Congress rival PURNMASI RAM by a margin of 117793 votes in the last Lok Sabha elections in 2014. Other five assembly constituencies are Lauriya, Valmiki Nagar, Ramnagar, Bagaha and Sikta.
BJP has fielded Renu Kumari in Narkatiaganj in West Champaran district. Rashmi Varma, sitting BJP legislator from Narkatiaganj, has received a letter threatening her and her children if she chose to contest the polls. Varma had won the byelection in August 2014 after the seat fell vacant with the then BJP MLA Satish Chandra Dubey getting elected to the Lok Sabha in May 2014.
However, the BJP this time dropped her from its list of candidates for the ensuing polls. Vinay Verma from Congress is expected to give a tough fight to Rashmi Varma of BJP in Narkatiaganj.