EU 27 may refer to: From 1 February 2020, the 27 European Union countries after the UK left the EU From 2016 until 31 January 2020, the 27 European Union countries involved in Brexit negotiations with the UK; in other words, the EU except for the United Kingdom the European Union in the period between 2007 and 2013, before Croatia joined, when it had 27 countries, or the countries that were members then the 2007 enlargement of the European Union