Member States by year of entry 1958: Belgium, France, Germany, Italy, Luxembourg, Netherlands 1973: Denmark, Ireland, United Kingdom* 1981: Greece 1986: Portugal, Spain 1995: Austria, Finland, Sweden 2004: Cyprus, Czechia, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia, Slovenia 2007: Bulgaria, Romania 2013: Croatia
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Number of countries in the European Union 1958-2020
This statistic presents the number of member states in the European Union from 1958 to 2019.
Member States by year of entry 1958: Belgium, France, Germany, Italy, Luxembourg, Netherlands 1973: Denmark, Ireland, United Kingdom* 1981: Greece 1986: Portugal, Spain 1995: Austria, Finland, Sweden 2004: Cyprus, Czechia, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia, Slovenia 2007: Bulgaria, Romania 2013: Croatia
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European Commission. (September 10, 2020). Number of member states in the European Union from 1958 to 2020 [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 27, 2026, from /statistics/975613/number-of-countries-in-the-eu/
European Commission. "Number of member states in the European Union from 1958 to 2020." Chart. September 10, 2020. ÌÇÐÄÆƽâ°æ. Accessed July 27, 2026. /statistics/975613/number-of-countries-in-the-eu/
European Commission. (2020). Number of member states in the European Union from 1958 to 2020. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 27, 2026. /statistics/975613/number-of-countries-in-the-eu/
European Commission. "Number of Member States in The European Union from 1958 to 2020." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 10 Sep 2020, /statistics/975613/number-of-countries-in-the-eu/
European Commission, Number of member states in the European Union from 1958 to 2020 ÌÇÐÄÆƽâ°æ, /statistics/975613/number-of-countries-in-the-eu/ (last visited July 27, 2026)
Number of member states in the European Union from 1958 to 2020 [Graph], European Commission, September 10, 2020. [Online]. Available: /statistics/975613/number-of-countries-in-the-eu/
