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The Seventeenth Legislative Assembly of Bihar (Seventeenth Vidhan Sabha of Bihar) was constituted on 23 November 2020 as a result of Bihar Legislative Assembly election, 2020 held between 28 October 2020 to 7 November 2020.
| Alliance | Party | Seats | Total | ||
| MGB | RJD | 79 | 160 | ||
| JD(U) | 45 | ||||
| INC | 19 | ||||
| CPI(ML)L | 12 | ||||
| CPI | 2 | ||||
| CPI(M) | 2 | ||||
| IND | 1 | ||||
| NDA | BJP | 78 | 82 | ||
| HAM(S) | 4 | ||||
| OTH | AIMIM | 1 | 1 | ||
| Alliance | Party | Seats | Total | ||
| NDA | BJP | 78 | 132 | ||
| JD(U) | 45 | ||||
| HAM(S) | 4 | ||||
| RJD(Rebel) | 4 | ||||
| IND | 1 | ||||
| MGB | RJD | 75 | 110 | ||
| INC | 19 | ||||
| CPI(ML)L | 12 | ||||
| CPI | 2 | ||||
| CPI(M) | 2 | ||||
| OTH | AIMIM | 1 | 1 | ||
| District | No. | Constituency | Name | Party | Alliance | Remarks | ||
| West Champaran | 1 | Valmiki Nagar | Dhirendra Pratap Singh | JD(U) | NDA | |||
| 2 | Ramnagar | Bhagirathi Devi | BJP | NDA | ||||
| 3 | Narkatiaganj | Rashmi Varma | BJP | NDA | ||||
| 4 | Bagaha | Ram Singh | BJP | NDA | ||||
| 5 | Lauriya | Vinay Bihari | BJP | NDA | ||||
| 6 | Nautan | Narayan Prasad | BJP | NDA | ||||
| 7 | Chanpatia | Umakant Singh | BJP | NDA | ||||
| 8 | Bettiah | Renu Devi | BJP | NDA | ||||
| 9 | Sikta | Birendra Prasad Gupta | CPI(ML)L | MGB | ||||
| East Champaran | 10 | Raxaul | Pramod Kumar Sinha | BJP | NDA | |||
| 11 | Sugauli | Shashi Bhushan Singh | RJD | MGB | ||||
| 12 | Narkatiya | Shamim Ahmad | RJD | MGB | ||||
| 13 | Harsidhi | Krishnanandan Paswan | BJP | NDA | ||||
| 14 | Govindganj | Sunil Mani Tiwari | BJP | NDA | ||||
| 15 | Kesaria | Shalini Mishra | JD(U) | NDA | ||||
| 16 | Kalyanpur | Manoj Kumar Yadav | RJD | MGB | ||||
| 17 | Pipra | Shyambabu Prasad Yadav | BJP | NDA | ||||
| 18 | Madhuban | Rana Randhir Singh | BJP | NDA | ||||
| 19 | Motihari | Pramod Kumar | BJP | NDA | ||||
| 20 | Chiraia | Lal Babu Prasad Gupta | BJP | NDA | ||||
| 21 | Dhaka | Pawan Jaiswal | BJP | NDA | ||||
| Sheohar | 22 | Sheohar | Chetan Anand | JD(U) | NDA | Switched from RJD to JDU | ||
| Sitamarhi | 23 | Riga | Moti Lal Prasad | BJP | NDA | |||
| 24 | Bathnaha | Anil Kumar | BJP | NDA | ||||
| 25 | Parihar | Gayatri Devi Yadav | BJP | NDA | ||||
| 26 | Sursand | Dilip Kumar Ray | JD(U) | NDA | ||||
| 27 | Bajpatti | Mukesh Kumar Yadav | RJD | MGB | ||||
| 28 | Sitamarhi | Mithilesh Kumar | BJP | NDA | ||||
| 29 | Runnisaidpur | Pankaj Kumar Mishra | JD(U) | NDA | ||||
| 30 | Belsand | Sanjay Kumar Gupta | RJD | MGB | ||||
| Madhubani | 31 | Harlakhi | Sudhanshu Shekhar | JD(U) | NDA | |||
| 32 | Benipatti | Vinod Narayan Jha | BJP | NDA | ||||
| 33 | Khajauli | Arun Shankar Prasad | BJP | NDA | ||||
| 34 | Babubarhi | Mina Kumari | JD(U) | NDA | ||||
| 35 | Bisfi | Haribhushan Thakur | BJP | NDA | ||||
| 36 | Madhubani | Samir Kumar Mahaseth | RJD | MGB | ||||
| 37 | Rajnagar | Ram Prit Paswan | BJP | NDA | ||||
| 38 | Jhanjharpur | Nitish Mishra | BJP | NDA | ||||
| 39 | Phulparas | Sheela Kumari Mandal | JD(U) | NDA | ||||
| 40 | Laukaha | Bharat Bhushan Mandal | RJD | MGB | ||||
| Supaul | 41 | Nirmali | Aniruddha Prasad Yadav | JD(U) | NDA | |||
| 42 | Pipra | Rambilash Kamat | JD(U) | NDA | ||||
| 43 | Supaul | Bijendra Prasad Yadav | JD(U) | NDA | ||||
| 44 | Triveniganj | Veena Bharti | JD(U) | NDA | ||||
| 45 | Chhatapur | Neeraj Kumar Singh | BJP | NDA | ||||
| Araria | 46 | Narpatganj | Jai Prakash Yadav | BJP | NDA | |||
| 47 | Raniganj | Achmit Rishidev | JD(U) | NDA | ||||
| 48 | Forbesganj | Vidya Sagar Keshri | BJP | NDA | ||||
| 49 | Araria | Avidur Rahman | INC | MGB | ||||