|Name of the Candidate||Party Name||Result|
|AJAY KUMAR MANDAL||Janata Dal (United)||66485|
|AMAR NATH PRASAD ALIES AMAR SINGH KUSHWAHA||Lok Jan Shakti Party||58660|
|ABU QAISER||Jan Adhikar Party (Loktantrik)||8725|
|OM PRAKASH YADAV||Independent||7420|
|MANOHAR KUMAR MANDAL||Communist Party of India (Marxist)||5682|
|SANJAY KUMAR ALIES PAPPU YADAV||Independent||4460|
|DIWAKAR CHANDRA DUBEY||Samajwadi Party||2534|
|BIRENDRA PRASAD SINGH||Bhartiya Jan Hitkari Party||2342|
|SANDIP KUMAR SHARMA||Garib Janta Dal (Secular)||1873|
|MOHAMMAD RIJBI||Bahujan Samaj Party||1357|
|UPENDER MANDAL||National Tiger Party||1110|
|DEEPAK KUMAR||SOCIALIST UNITY CENTRE OF INDIA (COMMUNIST)||983|
|UPENDRA PRASAD DAS||Sarvajan Kalyan Loktantrik Party||959|
|None of the Above||None of the Above||7172|
|AC No||Category||Poll Phases||Last Date of Nominations||Date of Polls||Result|
|158||GEN||Phase I||Sep 23rd 2015||Oct 12th 2015||Nov 8th 2015|
One of the seven assembly segments located in the Bhagalpur district of Bihar, Nathnagar is currently held by the sitting Janata Dal (United) MLA Ajai Kumar Mandal who won the seat by defeating his nearest Rashtriya Janata Dal (RJD) rival Abu Kaishar by a margin of 4727 votes in the last general assembly polls to the Bihar Legislative assembly in 2010.
In that election, while Ajai Kumar Mandal, the winner of the Kahalgaon assembly seat in the previous assembly election in October in 2005, polled 42094 votes, the RJD nominee received 37367 votes and was followed by Parwez Jamal of the Congress who got 16623 votes.
Former minister in the Lalu and Nitish Kumar-led NDA government. Sudha Shrivastava was elected from Nathnagar in 1977, 1990, 2000, February 2005 and October 2005. While she won in 1977 as a nominee of the Janata Party, her win in 1990 came as a candidate of the Janata Dal. She joined the Samata Party, the earlier avatar of JD (U), and successfully contested the Nathnagar assembly seat in 2000 on the ticket of the party. She managed to win both the elections in 2005.
Earlier Chunchun Prasad Yadav, who had defeated former Bihar Chief Minister and Congress heavyweight Bhagwat Jha Azad in 1989 Lok Sabha poll to Bhagalpur by a massive margin, had emerged victorious from the Nathnagar assembly seat in 1969, 1972 and 1985. He claimed the seat in 1969 on the ticket of the Bhartiya Jana Sangh, the earlier avatar of the BJP.
While he won the seat in the next assembly election in 1972 as a Congress nominee, he was elected in 1985 as a candidate of the Lok Dal of the former Prime Minister Charan Singh. Chunchun Prasad Yadav went on to win the Bhagalpur Lok Sabha seat in 1991 and 1996.
One of the seven assembly constituencies located in the Bhagalpur district, Nathnagar is one of the six assembly constituencies the combination of which goes on to create the parliamentary constituency of Bhagalpur which is currently represented by Shailesh Kumar Mandal alias Bulo Mandal of the RJD who won the seat by defeating Shahnawaz Hussain of the BJP in 2014 Lok Sabha elections by a margin 9,485 votes.
Jan Adhikar Party floated by Madhepura MP Pappu Yadav has fielded JD(U) rebel Abu Kaiser from Nath Nagar constituency. In 2014 Lok Sabha polls, Kaiser had quit the RJD and contested from Bhagalpur constituency on the JD(U) ticket. He was apparently hoping to get the ticket of the grand alliance from any seat in Bhagalpur or Banka district but was left disappointed. Hence, Kaiser shifted his loyalty to Pappu Yadav's Jan Adhikar Party which is part of the Third Front led by Mulayam Singh Yadav.