NATO members: all 32 countries

The current members and when they joined

The alphabetical list shows the year each country entered the alliance. Sorting by year reveals the original 12 members and later enlargements. The accession date concerns NATO membership; it is not a country’s independence date, the date of its current constitution or the year it joined another organization.

32 countries. Scroll the table for all entries.

NATO’s 32 member countries and accession years; reviewed 1 October 2026.

Country ↕	Joined NATO ↕	Capital ↕	EU membership ↕
Albania	2009	Tirana	Outside the EU
Belgium	1949	Brussels	EU member
Bulgaria	2004	Sofia	EU member
Canada	1949	Ottawa	Outside the EU
Croatia	2009	Zagreb	EU member
Czech Republic	1999	Prague	EU member
Denmark	1949	Copenhagen	EU member
Estonia	2004	Tallinn	EU member
Finland	2023	Helsinki	EU member
France	1949	Paris	EU member
Germany	1955	Berlin	EU member
Greece	1952	Athens	EU member
Hungary	1999	Budapest	EU member
Iceland	1949	Reykjavik	Outside the EU
Italy	1949	Rome	EU member
Latvia	2004	Riga	EU member
Lithuania	2004	Vilnius	EU member
Luxembourg	1949	Luxembourg	EU member
Montenegro	2017	Podgorica	Outside the EU
Netherlands	1949	Amsterdam	EU member
North Macedonia	2020	Skopje	Outside the EU
Norway	1949	Oslo	Outside the EU
Poland	1999	Warsaw	EU member
Portugal	1949	Lisbon	EU member
Romania	2004	Bucharest	EU member
Slovakia	2004	Bratislava	EU member
Slovenia	2004	Ljubljana	EU member
Spain	1982	Madrid	EU member
Sweden	2024	Stockholm	EU member
Turkey	1952	Ankara	Outside the EU
United Kingdom	1949	London	Outside the EU
United States	1949	Washington D.C.	Outside the EU

Canada and the United States are the two North American members. The alliance’s name does not mean every member must have an Atlantic coastline: several are landlocked, and the membership also extends into the eastern Mediterranean and Türkiye. Membership is determined by accession to the treaty, not a geographic coastline test.

How the 32-member alliance developed

The founding group in 1949 consisted of Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, the Netherlands, Norway, Portugal, the United Kingdom and the United States. Greece and Türkiye joined in 1952, Germany in 1955 and Spain in 1982.

Later rounds added countries from central and eastern Europe and the western Balkans. Finland’s accession on 4 April 2023 and Sweden’s on 7 March 2024 brought the total to 32. A historical map from before either accession will therefore show a different membership even if its older data were accurate at publication.

An applicant, invited country or partner is not automatically a member. For a present-tense count, accession must be completed. This is why a news story about cooperation or negotiations should not by itself lead to a country being added to the table.

NATO and the European Union overlap, but differ

23 countries belong to both NATO and the EU. Austria, Cyprus, Ireland and Malta are EU members outside NATO. NATO members outside the EU include Canada, the United States, the United Kingdom, Norway, Iceland and Türkiye, along with Albania, Montenegro and North Macedonia.

The distinction matters because the organizations serve different purposes and have different institutions. Joining the EU does not automatically join a country to NATO, and leaving the EU does not automatically remove a country from NATO. The United Kingdom is a straightforward example of the latter distinction.

For travel, neither NATO membership nor the NATO accession year establishes a visa entitlement or entry rule. Those questions belong to the destination’s immigration system and, where applicable, European travel arrangements.

What collective defence means

Article 5 establishes the principle that an armed attack against an ally within the treaty’s scope is considered an attack against all. Assistance is not described as one automatic, identical military response from every member: the treaty gives each ally responsibility for taking the action it considers necessary, which may include armed force.

A membership table cannot measure readiness, defence spending or the military strength of an individual country. Those require separate evidence. The purpose of this list is to identify who belongs to the alliance and how that membership developed, without turning affiliation into an unsupported ranking of power.