2010 Bihar Legislative Assembly election

47 seats were voted for. The following constituencies would vote from 7:00 to 17:00:[1]
Harlakhi, Benipatti, Khajauli, Babubarhi, Bisfi, Madhubani, Rajnagar (SC), Jhanjharpur, Phulparas, Laukaha, Nirmali, Pipra, Supaul, Triveniganj (SC), Chhatapur, Narpatganj, Raniganj (SC), Forbesganj, Araria, Jokihat, Sikti, Bahadurganj, Thakurganj, Kishanganj, Kochadhaman, Amour, Baisi, Kasba, Banmankhi (SC), Rupauli, Dhamdaha, Purnia, Katihar, Kadwa, Balrampur, Pranpur, Manihari (ST), Barari, Korha (SC), Alamnagar, Bihariganj, Singheshwar (SC), Madhepura, Sonbarsha (SC), Saharsa

The following constituencies would vote from 7:00 to 15:00:
Simri, Bakhtiarpur, Mahishi

45 seats were voted for. The following constituencies would vote from 7:00 to 17:00:[1]
Sheohar, Riga, Bathnaha (SC), Parihar, Sursand, Bajpatti, Sitamarhi, Runnisaidpur, Belsand, Kusheshwar Asthan (SC), Gaura Bauram, Benipur, Alinagar, Darbhanga Rural, Darbhanga, Hayaghat, Bahadurpur, Keoti, Jale, Gaighat, Aurai, Bochaha (SC), sakra (SC), Kurhani, Muzaffarpur, Kanti, Baruraj, Kalyanpur (SC), Warisnagar, Samastipur, Ujiarpur, Morwa, Sarairanjan, Mohiuddinnagar, Bibhutipur, Rosera (SC), Hasanpur, Narkatia, Pipra, Madhuban, Chiraia, Dhaka

The following constituencies would vote from 7:00 to 15:00:

Minapur, Paroo, Sahebgan

Arun Singh will Win Dhaka legislative assembly election in 2015

48 seats were voted for. The following constituencies would vote from 7:00 to 17:00:[1]
Narkatiaganj, Bagaha, Lauriya, Nautan, Chanpatia, Bettiah, Sikta, Raxaul, Sugauli, Harsidhi (SC), Govindganj, Kesaria, Kalyanpur, Motihari, Baikunthpur, Barauli, Gopalganj, Shahpur Patti, Kuchaikote, Bhorey (SC), Hathua, Siwan, Ziradei, Darauli (SC), Raghunathpur, Daraundha, Barharia, Goriakothi, Maharajganj, Ekma, Manjhi, Baniapur, Taraiya, Marhaura, Chapra, Garkha (SC), Amnour, Parsa, Sonepur, Hajipur, Lalganj, Vaishali, Mahua, Raja Pakar (SC), Mahnar The following constituencies would vote from 7:00 to 15:00:
Valmikinagar, Ramnagar (SC), Raghopur, Patepur (SC)

42 seats were voted for. The following constituencies would vote from 7:00 to 17:00:[1]
Cheria Bariarpur, Bachhwara, Teghra, Matihani, Sahebpur Kamal, Begusarai, Bakhri (SC), Khagaria, Beldaur, Parbatta, Lakhisarai, Munger, Bihpur, Gopalpur, Pirpainti (SC), Kahalgaon, Bhagalpur, Sultanganj, Nathnagar, Mokama, Barh, Bakhtiarpur, Digha, Bankipur, Kumhrar, Patna Sahib, Fatuha, Danapur, Maner, Amarpur, Dhauraiya (SC), Banka

The following constituencies would vote from 7:00 to 15:30:
Alauli (SC), Suryagarha, Tarapur, Jamalpur, Katoria (ST), Belhar, Sikandra (SC), Jamui, Jhajha, Chakai

The Banka Lok Sabha seat was also chosen in a by-election following the death of Digvijay Singh.[6]

35 seats were voted for. The following constituencies would vote from 7:00 to 17:00:[1]
Sandesh, Barhara, Arrah, Agiaon (SC), Tarari, Jagdishpur, Shahpur, Hisua, Nawada, Warsaliganj, Gaya Town, Belaganj, Atri, Wazirganj, Sheikhpura, Barbigha, Asthawan, Biharsharif, Rajgir (SC), Islampur, Hilsa, Nalanda, Harnaut,

The following constituencies would vote from 7:00 to 15:00:
Rajauli (SC), Gobindpur, Arwal, Kurtha, Jehanabad, Ghosi, Makhdumpur (SC), Bodh Gaya (SC), Phulwari (SC), Masaurhi (SC), Paliganj, Bikram

26 seats were voted for. The following constituencies would vote from 7:00 to 17:00:[1]
Brahampur, Buxar, Dumraon, Rajpur (SC), Ramgarh, Mohania (SC), Kargahar, Nokha, Obra, Aurangabad

The following constituencies would vote from 7:00 to 15:00:
Bhabua, Chainpur, Chenari (SC), Sasaram, Dinara, Dehri, Karakat, Goh, Nabinagar, Kutumba (SC), Rafiganj, Gurua, Sherghati, Imamganj (SC), Barachatti (SC), Tikari

Some key candidates were the NDA Assembly Speaker Uday Narayan Chaudhary, a RJD leader Shakil Ahmed Khan who was competing with JDU's Vinod Yadav, JDU Chhedi Paswan against RJD's Niranjan Ram, a former Union minister Kanti Singh against the BJP incumbent Rameshwar Prasad, Awadesh Narain Singh against RJD's Iliyas Hussain and Anil Kumar against RJD's Bagi Kumar Verma.

The final round's important race was that of a senior RJD leader Jagdanand Singh's son Sudhakar Singh, who was a candidate for the BJP against the RJD's Ambika Yadav. Singh campaigned against his son saying: "Sudhakar is my biological son but Ambika is my political heir." The JDU's Mahabali Singh's son Dharmendra also contested for the opposition RJD. Other family affairs were the JDU's Sushil Singh's older brother Sunil Singh, who was competing for the RJD.[7]

Two days before the second phase of voting naxals triggered a land mine in Sheohar district killing six policemen. As a result, the district's voting centres would close 2 hours earlier. The attack was seen as a resurgence in naxal activity after a lull due to its timing during an election.[15] Though the naxals had called for a boycott of the polls, the second phase ended largely unscathed.[16]

On the fourth phase of voting more bombs were set off. In the morning Naxals were responsible for a bomb blast near a bridge on the Chakai-Jamui road in the Batia jungle. Later on "anti-social elements" set off another bomb in the Danapur assembly constituency[6] wounding 2 people.[17] On the eve of the fifth phase of voting, the naxals called for a 24-hour bandh. During the bandh, security services attempted to defuse a bomb planted by the naxals, however 2 bomb disposal personnel were killed.[18]

Days before the final phase of voting a naxal boycott was enforced with a bombing of a bridge[19] and another attack that killed near the Chenari assembly constituency, which was due to vote during the final phase.[20] On the final day of voting 1 person was killed and 2 were injured when bomb exploded in a cinema hall,[21] 2 others were also killed trying to defuse a bomb.[22] A bomb plated to disrupt the final day of voting in Aurangabad district was found the following day, however, the police apparently left the live bomb unattended; as a result 8 children were killed when it exploded and villagers blamed the police, following which the district magistrate arrived and announced compensation of Rs. 100,000 for each of the dead.[23]

Areas in Sonbhadra and Chandauli districts in Uttar Pradesh, near the border with Rohtas and Bhabhua districts in Bihar, were sealed due to the final phase of voting.[24] The Imamganj constituency, which is apparently "simmering [with] tension" over naxal activity was seen as a security challenge. It also had a quiet campaign. Shiv Shankar Singh, a confidant of the Bihar Assembly Speaker, Uday Narayan Chaudhary, of the constituency said: "There will be no election campaigning in the interiors. Who will take the risk? Public meetings were held only in block headquarters of Dumaria, Imamganj and Banker Bazar." There were also posters calling for poll boycott in the days leading up to the poll.[25] Some reports, however, said the constituency is safer now than a decade ago.[26]

Despite the violence, the Chief Election Commissioner S.Y. Quraishi said this was "the most peaceful election ever [held in Bihar]."[27]

First information reports were filed against the head of the RJD, Lalu Prasad Yadav, and his wife Rabri Devi for violating the Election Commission of India's model code of conduct for having brought their own security personnel into the polling booth in Dinapur of Digha constituency in the provincial capital Patna. A FIR was also filed against Bihar's JDU Transport Minister Ram Nandan Singh for having taken two guards into the polling booth while casting his vote in the Parbatta constituency of Khagaria district.[6]

The following is the list of winning and nearest lost candidate in 2010 Bihar legislative assembly election.[29]

• = Ranjan announced on 13 August 2015 he would join the Bharatiya Janata Party.[30]
  • = indicated they would also join the BJP along with Ranjan.