NATO member countries

As of the time of writing, NATO has 32 member countries, known as NATO Allies, which are independent nations that collaborate through NATO to consider political and security matters and decide together by consensus.

• NATO was created by 12 countries from Europe and North America on 4 April 1949.
• Since NATO’s creation, another 20 countries have been added to the Alliance through 10 rounds of enlargement (1952, 1955, 1982, 1999, 2004, 2009, 2017, 2020, 2023 and 2024).
• Article 10 of the North Atlantic Treaty explains how countries can join the Alliance, stating that membership is open to any “European state in a position to further the principles of this Treaty and to contribute to the security of the North Atlantic area”.
• The North Atlantic Council, the main decision-making body at NATO, makes the decision to invite a country to join the Alliance based on consensus of all Allies.

NATO member countries

1. Albania  
2. Belgium  
3. Bulgaria  
4. Canada  
5. Croatia  
6. Czech Republic  
7. Denmark  
8. Estonia  
9. Finland  
10. France  
11. Germany  
12. Greece  
13. Hungary  
14. Iceland  
15. Italy  
16. Latvia  
17. Lithuania  
18. Luxembourg  
19. Montenegro  
20. Netherlands  
21. North Macedonia
22. Norway  
23. Poland  
24. Portugal  
25. Romania  
26. Slovakia  
27. Slovenia  
28. Spain  
29. Sweden  
30. Turkey  
31. United Kingdom  
32. United States

The most recent additions to NATO were:  

• Finland: April 4, 2023  

Sweden: March 7, 2024