2016 United Kingdom European Union membership referendum

On 23 June 2016, a referendum, commonly referred to as the EU referendum or the Brexit referendum, took place in the United Kingdom (UK) and Gibraltar to ask the electorate whether the country should remain a member of, or leave, the European Union (EU). It was organised and facilitated through the European Union Referendum Act 2015 and the Political Parties, Elections and Referendums Act 2000. The referendum resulted in 51.9% of the votes cast being in favour of leaving the EU. Although the referendum was legally non-binding, the government of the time promised to implement the result.[1]

Quick facts: Results, Choice, Votes,  %... ▼

2016 United Kingdom European Union membership referendum

23 June 2016
Should the United Kingdom remain a member of the European Union or leave the European Union?
Results
Choice Votes  % Leave 17,410,742 51.89% Remain 16,141,241 48.11% Valid votes 33,551,983 99.92% Invalid or blank votes 25,359 0.08% Total votes 33,577,342 100.00% Registered voters/turnout 46,500,001 72.21%
Result by voting areas (the results for Northern Ireland are by Parliamentary constituency) Result by constituencies (Gibraltar not included) Results by voting areas and constituencies
On the map, the darker shades for a colour indicate a larger margin. The electorate of 46.5m represents 70.8% of the population.

Part of a series of articles on
Brexit
Withdrawal of the United Kingdom from the European Union Glossary of terms
Background European Communities Act UK opt-outs from EU legislation Euroscepticism in the UK UK opinion polling on EU membership Campaigns for a referendum People's Pledge Labour for a Referendum Bloomberg speech In or Out 2013–14 EU (Referendum) Bill (unsuccessful) 2014 European Parliament election 2014 UK Parliament by-elections Clacton Heywood and Middleton Rochester and Strood 2015 UK general election 2015–16 EU membership renegotiation
2016 EU referendum EU Referendum Act (Gibraltar) EU Referendum (Date of Referendum etc.) Regulations EU Referendum (Conduct) Regulations Issues Endorsements Opinion polling UK Government pro-EU leaflet Campaigns Leave campaigns Vote Leave (official) Business for Britain Conservatives for Britain BeLeave Leave.EU Bpoplive The Freedom Association Better Off Out Grassroots Out Labour Leave Get Britain Out Bruges Group Campaign for an Independent Britain Brexit: The Movie Remain campaigns Britain Stronger in Europe (official) Labour In for Britain European Movement UK Britain in Europe British Influence Business for New Europe Nucleus Project Fear Outcome Results Causes for result International reactions Immediate aftermath 2016 Conservative Party election 2016 Labour Party election 2016 UKIP election Department for Exiting the EU Department for International Trade Allegations of unlawful campaigning Alleged Russian interference
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Timeline Bloomberg speech Jan 2013 Referendum Bill blocked Jan 2014 European Parliament election May 2014 2015 general election May 2015 Renegotiation begins Jun 2015 Referendum Act passed Dec 2015 Renegotiation concluded Feb 2016 Referendum held Jun 2016 David Cameron resigns as PM Jul 2016 Theresa May becomes PM Jul 2016 Article 50 judgement Jan 2017 Brexit plan presented Feb 2017 Notification Act passed Mar 2017 Article 50 invoked Mar 2017 Repeal Bill plan presented Mar 2017 2017 general election Jun 2017 Brexit negotiations begin Jun 2017 Withdrawal Act passed Jun 2018 Chequers plan presented Jul 2018 Withdrawal agreement plan presented July 2018 Withdrawal agreement released Nov 2018 Scottish Continuity Bill blocked Dec 2018 Meaningful votes Jan–Mar 2019 Brexit delayed until 12 April Mar 2019 Cooper–Letwin Act passed Apr 2019 Brexit delayed until 31 October Apr 2019 European Parliament election May 2019 Theresa May resigns as PM Jul 2019 Boris Johnson becomes PM Jul 2019 Prorogation and annulment Aug–Sep 2019 Benn Act passed Sep 2019 Withdrawal agreement revised Oct 2019 Brexit delayed until 31 January Oct 2019 2019 general election Dec 2019 Agreement Act passed Jan 2020 UK leaves the European Union Jan 2020 Implementation period begins Jan 2020 UK–EU trade deal agreed Dec 2020 Future Relationship Act passed Dec 2020 Scottish Continuity Act passed Dec 2020 Implementation period ends Dec 2020 New EU–UK relationship begins Jan 2021 UK–EU trade deal ratified Apr 2021 Windsor Framework released Feb 2023 Windsor framework adopted Mar 2023
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National and regional referendums held within the United Kingdom and its constituent countries
Northern Ireland border poll     1973 EC membership referendum     1975 Scottish devolution referendum     1979 Welsh devolution referendum     1979 Scottish devolution referendum     1997 Welsh devolution referendum     1997 Greater London Authority referendum     1998 NI Good Friday Agreement referendum     1998 NE England devolution referendum     2004 Welsh devolution referendum     2011 Alternative Vote referendum     2011 Scottish independence referendum     2014 EU membership referendum     2016     * UK-wide referendums in bold
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Part of a series of articles on
UK membership of the European Union (1973–2020)
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1975 referendum Referendum Act (results)
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Membership of the EU had long been a topic of debate in the United Kingdom. The country joined the European Communities (EC), principally the European Economic Community (EEC) or Common Market, the forerunner to the European Union, in 1973, along with the European Coal and Steel Community (ECSC), and the European Atomic Energy Community (EAEC or Euratom). A referendum on continued membership of the Communities was held in 1975, with 67.2% of the votes cast in favour of Britain remaining a member.[2]

In May 2015, following a Conservative Party manifesto pledge, the legal basis for the EU referendum was established through the European Union Referendum Act 2015. Britain Stronger in Europe became the official group campaigning for the UK to remain in the EU, and was endorsed by the Prime Minister David Cameron and Chancellor George Osborne. Vote Leave was the official group campaigning for the UK to leave the EU, and was fronted by Conservative MPs Boris Johnson and Michael Gove along with Labour MP Gisela Stuart.[3] Other campaign groups, political parties, businesses, trade unions, newspapers and prominent individuals were also involved, with both sides having supporters from across the political spectrum. Parties in favour of 'remain' included Labour, the Liberal Democrats, the Scottish National Party (SNP), Plaid Cymru and the Green Party;[4][5][6][7] while the UK Independence Party (UKIP) campaigned in favour of leaving the European Union;[8] and the Conservative Party remained neutral.[9] In spite of the official positions of the Conservative Party and Labour, both parties allowed their MPs to publicly campaign for either side of the issue.[10][11]

Immediately after the result, financial markets reacted negatively worldwide, and Cameron announced that he would resign as Prime Minister and Leader of the Conservative Party, having campaigned unsuccessfully to remain in the European Union. It was the first time that a national referendum result had gone against the preferred option of the UK Government. Cameron was succeeded by Theresa May on 13 July 2016. Labour leader Jeremy Corbyn also faced a leadership challenge as a result of the EU referendum. On 29 March 2017, the United Kingdom gave formal notice of intent to withdraw from the EU.