| Name of the Candidate | Party Name | Result |
| VIJAY KUMAR KHEMKA | Bharatiya Janata Party | 92020 |
| INDU SINHA | Indian National Congress | 59205 |
| RAM CHARITRA YADAV | Independent | 7614 |
| RAJEEV KUMAR SINGH | Communist Party of India (Marxist) | 3993 |
| ARVIND KUMAR@ BHOLA SAH | Jan Adhikar Party (Loktantrik) | 2670 |
| ASHOK KUMAR SINGH | Independent | 1697 |
| DIVAKAR CHOUDHARY | Nationalist Congress Party | 1539 |
| RAJESH KUMAR NIRALA | Independent | 1488 |
| AHMAD HUSSAIN | Independent | 1480 |
| RAKESH KUMAR SINGH | Independent | 1415 |
| MASIUR RAHMAN | Jharkhand Mukti Morcha | 1388 |
| LT. COL. AKSHAY YADAV | Samajwadi Party | 1321 |
| SUMITRA DEVI MANDAL | Rashtravadi Janata Party | 1257 |
| ADITYA KUMAR JHA | Independent | 1089 |
| ASHOK KUMAR MAHTO | Bahujan Samaj Party | 996 |
| MOHAMMAD ASLAM AZAD | Independent | 873 |
| DEEPAK KUMAR | Independent | 841 |
| AKHILESH VERMA | Sarvajan Kalyan Loktantrik Party | 744 |
| RASHI PRASAD | Proutist Bloc, India | 738 |
| BINDU PRAKASH JHA | Ittehad-E-Millait Council | 725 |
| RANJEET KUMAR SINGH | Indian Union Muslim League | 708 |
| RAKESH KUMAR | Independent | 679 |
| BACHCHI SHARMA | Dalit Samaj Party | 409 |
| MANIK CHAND YADAV | Independent | 406 |
| KASHOR KUMAR YADAV | All India Forward Bloc (Subhasist) | 382 |
| None of the Above | None of the Above | 1109 |
| AC No | Category | Poll Phases | Last Date of Nominations | Date of Polls | Result |
| 62 | GEN | Phase V | Oct 8th 2015 | Nov 5th 2015 | Nov 8th 2015 |
Purnia is a Lok Sabha as well as legislative assembly constituencies. Purnia assembly segment comprises Purnia East nagar panchayat and Purnia East community development block. There are 2,64,311 voters of whom 1,40,183 are male and 1,24,121 female voters.The Purnia assembly segment is in Purnia district.
One of the seven assembly segments located in the district of the same name in Bihar, Purnia is currently being represented by Kiran Devi who won the seat for the BJP by defeating his nearest Congress rival Ramcharitra Yadav by a margin of more than 22 000 votes in a byepoll held in 2011, necessitated due to the murder of its sitting BJP MLA Raj Kishore Keshri by a school teacher named Rupam Pathak allegedly sexually exploiting her. Kiran Devi is the widow of Raj Kishore Keshri.
Raj Kishore Keshri, who had been representing the seat since 2000 as a BJP candidate, had been elected in 2000, 2005 and 2010. He had won both the elections in 2005. It is worth mentioning that Bihar went to the assembly polls twice in 2005 because the earlier one held in February threw hung assembly necessitating the holding of the second assembly polls in the month of November of the same year. In all these elections his nearest rival was Ramcharitra Yadav who is known for switching his loyalties.
Earlier Purnia had elected former CPIM MLA Ajit Sarkar in 1980, 1985, 1990 and 1995. In a byepoll to the seat held in 1998 necessitated due to the murder of Ajit Sarkar, his widow Madhvi Sarkar won the seat by trouncing Sudhir Prasad Choudhary of the BJP. In 1995 Ajit Sarkar had defeated Rajesh Ranjan, more famously known as Pappu Yadav, who was convicted of murdering the former by a lower court. Pappu yadav was later acquitted of the charges by the higher court.
Kamal Deo Narain Sinha of the Congress had won all the first six assembly elections to Purnia. He was elected from the seat in 1951, 1957, 1962, 1967 and 1972.
Purnia is one of the six five assembly segments that combine to form the parliamentary constituency of the same name which is currently represented by Santosh Kumar Kushwaha of the JD (U) who won it by defeating his nearest rival and sitting BJP MP Uday Singh by a margin of 115669 votes in the last Lok Sabha general elections in 2014.
Most of the residents in Purnea are migrants as this constituency is a business hub. It has a mixed population without domination of a single caste although Marwaris and Baniyas constitute 40-45% of the total population. The BJP has an upper hand in this constituency because of two reasons − large number of cadre votes and majority of the business class. The saffron party has been wining the seat for the past 25 years. This year, it has fielded liquor baron Vijay Khemka against Indu Sinha of the Congress. Khemka has a clean image and enjoys the support of the business community and others.
Therefore, his winning probability is higher. Sinha is a weak candidate having no strong political career. In addition, Congress has no hold in this constituency. Though political analysts say the constituency "appears to be an adopted seat of the BJP", the contest here has always been multi-cornered. CPI(M)'s Ajit Sarkar defeated Sharda Prasad Singh of the Congress in 1980, Kamaldeo Narayan Sinha of Congress in 1985, Ravindra Narayan Singh of Janata Dal in 1990 and Rajesh Ranjan of Samta Party in 1995.
He also won for the fifth consecutive term. After his assassination in 1998, his widow Madhwi Sarkar was elected for a period of two years. She lost the seat to BJP's Raj Kishore Keshri in the 2000. The latter's winning spree continued till he was stabbed to death by on 4 January, 2011 by a school teacher, who accused him of raping and sexually exploiting her. After his death, riding on the sympathy wave, his wife Kiran Keshri contested the by-poll and won the seat with a huge margin.