International organisation
North Atlantic Treaty Organization
The Atlantic alliance of 1949, whose Article 5 makes an armed attack on one an attack on all -- 32 members since Sweden acceded in 2024.
- Abbreviation
- NATO
- Founded
- 1949-04-04
- Headquarters
- Brussels
- Member states
- 32 resolved, 32 published by the organisation
- Official site
- https://nato.int
Member states
Ordered by accession. A state with no recorded date is listed last rather than given one.
A joining date is the one the source records, which may be the day a treaty was signed or the day it took effect. States that joined together can therefore differ by months here.
| State | Joined | Listed by the source as |
|---|---|---|
| Belgium | 1949-04-04 | — |
| Canada | 1949-04-04 | — |
| France | 1949-04-04 | — |
| Iceland | 1949-04-04 | — |
| Italy | 1949-04-04 | — |
| Kingdom of Denmark | 1949-04-04 | — |
| Kingdom of the Netherlands | 1949-04-04 | Netherlands |
| Luxembourg | 1949-04-04 | — |
| Norway | 1949-04-04 | — |
| Portugal | 1949-04-04 | — |
| United Kingdom | 1949-04-04 | — |
| United States | 1949-04-04 | — |
| Greece | 1952-02-18 | — |
| Turkey | 1952-02-18 | — |
| Germany | 1955-05-09 | — |
| Spain | 1982-05-30 | — |
| Czech Republic | 1999-03-12 | — |
| Hungary | 1999-03-12 | — |
| Poland | 1999-03-12 | — |
| Bulgaria | 2004-03-29 | — |
| Estonia | 2004-03-29 | — |
| Latvia | 2004-03-29 | — |
| Lithuania | 2004-03-29 | — |
| Romania | 2004-03-29 | — |
| Slovakia | 2004-03-29 | — |
| Slovenia | 2004-03-29 | — |
| Albania | 2009-04-01 | — |
| Croatia | 2009-04-01 | — |
| Montenegro | 2017-06-05 | — |
| North Macedonia | 2020-03-27 | — |
| Finland | 2023-04-04 | — |
| Sweden | 2024-03-07 | — |
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Where this page comes from
- Wikidata — CC0 1.0 · source