| Name of the Candidate | Party Name | Results |
| SANJAY KUMAR TIWARI ALIAS MUNNA TIWARI | Indian National Congress | Winner 66527 |
| PRADEEP DUBEY | Bharatiya Janata Party | 56346 |
| SAROJ KUMAR RAJBHAR | Bahujan Samaj Party | 15298 |
| BHAGWATI PRASAD SRIVASTVA | Communist Party of India | 2786 |
| ASHOK KUMAR SINGH | Independent | 2491 |
| MANOJ KUMAR SINGH | Independent | 1738 |
| ARAVIND KUMAR PANDEY | Independent | 1512 |
| RAMESAR NONIYA | Shivsena | 1473 |
| SHIVJI PANDEY | Independent | 1352 |
| DHIRENDRA KUMAR CHOUDHARY | Communist Party of India (Marxist) | 1316 |
| DR. SHOBH NATH RAM ANOKHA | Bahujan Mukti Party | 836 |
| GORAKH NATH RAJBHAR | Independent | 668 |
| AJAY KUMAR MISHRA | Independent | 635 |
| BABAN SINGH | Samras Samaj Party | 598 |
| SEEMA SINGH | Independent | 597 |
| SHIVNATH GANDHI | Independent | 554 |
| ASHWINI KUMAR RAI | AARAKSHAN VIRODHI PARTY | 481 |
| UMASHANKAR PANDEY | Independent | 460 |
| SURYA KUMAR YADAV | Samajwadi Party | 440 |
| SANKAT MOCHCHAN PANDEY | Independent | 398 |
| USHA DUBEY | Hind Congress Party | 378 |
| DHANANJAY KUMAR DUBEY | Sarvajan Kalyan Loktantrik Party | 371 |
| DEO NARAYAN SINGH YADAV | Independent | 371 |
| PRABHU NATH YADAV | Independent | 358 |
| TAFIR HUSAIN | Hindustan Vikas Dal | 335 |
| DEO NARAYAN OJHA | Congress (Secular) | 330 |
| NIRMALA DEVI | Independent | 319 |
| MAHESH CHAUBEY | Independent | 317 |
| GOVIND SINGH | Independent | 311 |
| None of the Above |
| AC No | Category | Poll Phases | Last Date of Nominations | Date of Polls | Result |
| 200 | GEN | Phase III | Oct 1st 2015 | Oct 28th 2015 | Nov 8th 2015 |
Buxar is a legislative assembly segment, a Lok Sabha constituency and a district in the state of Bihar. The Buxar assembly constituency is home to 2,56,659 eligible voters among them 1,36,572 are male and 1,20,084 female voters. Buxar assembly segment comprises Chausa and Buxar community development blocks.
One of the four assembly constituencies located in the district of the same name in Bihar, Buxar is currently held by Sukhda Pandey of the BJP who had defeated her nearest rival Shyam Lal Singh Kushwaha of the Lalu Yadav's Rashtirya Janata Dal (RJD) by a handsome margin of 20183 votes in the last general assembly elections to Bihar in 2010.
In that election, while Sukhda Pandey, who had ealer won the seat in 2000 and 2005 February poll , polled 48062 votes, Shyam Lal Singh Kushwaha received 27879 votes and was followed by Kunwar Vijay Singh of the Bahujan Samaj Party (BSP) who obtained 12643 votes.
Former CPIM MLA from Buxar Manju Prakash came fourth with 9317 votes. The sitting MLA and independent candidate Hridaya Narayan Singh Yadav, who had won the Buxar seat in the previous assembly elections held in 2005 October/November on the ticket of the BSP by defeating Sukhda Pandey by a small margin of 1027 votes, was relegated to the seventh position with just 4260 votes and was closely followed by the Congress nominee Anil Kumar Trivedi with 3783 votes.
Brahampur, Dumraon and Rajpur are the other three assembly constituencies located in Buxar district. Sukhda Pandey, a retired principal of Magadh Mahila College in Patna, had defeated Hridaya Narayan Singh Yadav in the February 2005 elections. She had emerged victorious in 2000 by defeating the sitting CPM MLA Manju Prakash who was elected in 1990 and 1995. In 1990 Manju Prakash had trounced veteran Congress leader Jag Narain Trivedi who was earlier elected from the Buxar assembly seat in 1962, 1969, 1972, 1977 and 1980 on the ticket of the Congress. Jag Narain Trivedi served as the Public Works Department (PWD) Minister in the Congress government led by Jagannath Mishra in Bihar.
Buxar is one of the six assembly constituencies that combine to create the Buxar parliamentary constituency currently represented by Ashwani Kumar Choubey of the BJP who retained the seat for the BJP by defeating his nearest rival and sitting RJD MP Jagada Nand Singh by a margin of 1,32,338 votes in the last parliamentary elections in 2014. Brahampur, Dumraon, Rajpur, Dinara and Ramgarh are the other six assembly constituencies falling under the Buxar Lok Sabha seat.
Congress has fielded Sanjay Kumar Tiwari from Buxar. He will fight it out with Pradeep Dubey of BJP. Both the candidates are hoping the poll rallies by the central leadership of Congress and BJP will turn the tide in their favour. Apart from the caste factor, lack of development and job opportunities will play a key role in deciding the winner of this constituency.