The 2016 United Kingdom European Union membership referendum, commonly referred to as the EU referendum or the Brexit referendum, was a non-binding referendum that took place on 23 June 2016 in the United Kingdom (UK) and Gibraltar under the provisions of the European Union Referendum Act 2015 to ask the electorate whether the country should continue to remain a member of, or leave, the European Union (EU).

The United Kingdom European Union membership referendum took place on 23 June 2016 in the UK and Gibraltar. It was to decide whether the United Kingdom would stay in the European Union (EU). The referendum ended with 51.9% of votes in favour of leaving the EU.