The following is a list of by-elections held for the West Bengal Legislative Assembly, India, since its formation in 1946.
15th Assembly 2011 DateConstituencyMLA before electionParty before electionElected MLAParty after election25 September 2011125Basirhat UttarMostafa Bin QaseemATM Abdullah159BhabanipurSubrata BakshiMamata Banerjee
2012 DateConstituencyMLA before electionParty before electionElected MLAParty after election12 June 2012230DaspurAjit Bhunia Mamata Bhunia 252BankuraKashinath Misra Minati Misra
2013 DateConstituencyMLA before electionParty before electionElected MLAParty after election23 February 201351English BazarKrishnendu Narayan ChoudhuryKrishnendu Narayan Choudhury70RejinagarHumayun KabirRabiul Alam Chowdhury293NalhatiAbhijit MukherjeeDipak Chatterjee
2014 DateConstituencyMLA before electionParty before electionElected MLAParty after election 13 September 20141 Basirhat Dakshin Narayan Mukherjee Communist Party of India (Marxist) Samik Bhattacharya Bharatiya Janata Party2 Chowrangee Sikha Mitra All India Trinamool Congress Nayna Bandopadhyay All India Trinamool Congress
2015 DateConstituencyMLA before electionParty before electionElected MLAParty after election 13 February 20151 Krishnaganj Sushil Biswas All India Trinamool Congress Satyajit Biswas All India Trinamool Congress
16th Assembly
17th Assembly 2021 DateConstituencyMLA before electionParty before electionElected MLAParty after election30 September 2021159BhabanipurSovandeb Chattopadhyay All India Trinamool CongressMamata Banerjee All India Trinamool Congress30 October 20217 DinhataNisith PramanikBharatiya Janata PartyUdayan Guha All India Trinamool Congress86 SantipurJagannath SarkarBharatiya Janata PartyBraja Kishore Goswami All India Trinamool Congress109Khardaha Kajal Sinha All India Trinamool CongressSovandeb Chattopadhyay All India Trinamool Congress127Gosaba Jayanta Naskar All India Trinamool CongressSubrata Mondal All India Trinamool Congress
2022 DateConstituencyMLA before electionParty before electionElected MLAParty after election12 April 2022161BallygungeSubrata Mukherjee Babul Supriyo
2023 DateConstituencyMLA before electionParty before electionElected MLAParty after election27 February 202360SagardighiSubrata Saha Bayron Biswas 5 September 202315DhupguriBishnupada Roy Nirmal Chandra Roy
2024 DateConstituencyPrevious MLA ReasonElected MLA7 May 202462BhagabangolaIdris Ali Died on 16 February 2024Reyat Hossain Sarkar1 June 2024113BaranagarTapas RoyResigned on 4 March 2024Sayantika Banerjee10 July 202435RaiganjKrishna KalyaniResigned on 27 March 2024Krishna Kalyani90Ranaghat DakshinMukut Mani AdhikariResigned on 19 April 2024Mukut Mani Adhikari94BagdahBiswajit DasMadhuparna Thakur167ManiktalaSadhan PandeDied on 20 February 2022Supti Pandey13 November 20246SitaiJagadish Chandra Barma BasuniaElected to Lok Sabha on 4 June 2024Sangita Roy14MadarihatManoj TiggaJay Prakash Toppo104NaihatiPartha BhowmickSanat Dey121HaroaHaji Nurul IslamSheikh Rabiul Islam236MedinipurJune MaliaSujoy Hazra251TaldangraArup ChakrabortyFalguni Singhababu
2025 DateConstituencyPrevious MLA ReasonElected MLA 19 June 202580KaliganjNasiruddin AhamedDied on 1 February 2025Alifa Ahmed
18th Assembly 2026 DateConstituencyMLA before electionParty before electionReasonElected MLAParty after election6 October 202670RejinagarHumayun Kabir Aam Janata Unnayan PartyResigned on 13 May 2026, retaining NaodaTBD TBD210NandigramSuvendu Adhikari Bhartiya Janata PartyResigned on 13 May 2026, retaining Bhabanipur TBD TBD
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