How Many Countries Are in NATO?
NATO (North Atlantic Treaty Organization) has 32 member countries as of 2024. Sweden became the 32nd member in March 2024, and Finland was the 31st, joining in April 2023. NATO was founded in 1949 with 12 original members. Membership has grown steadily, especially after the end of the Cold War when many Eastern European countries joined. NATO's core commitment is Article 5: an attack on one member is considered an attack on all. The alliance spans North America and Europe.
Countries
32
Population
1.0B
% of total
12.8%
continents
3
Complete list
| # | Country | Population |
|---|---|---|
| 1 |  United States | 340.11M |
| 2 |  Turkey | 85.66M |
| 3 |  Germany | 83.49M |
| 4 |  United Kingdom | 69.28M |
| 5 |  France | 66.35M |
| 6 |  Italy | 58.93M |
| 7 |  Spain | 49.32M |
| 8 |  Canada | 41.65M |
| 9 |  Poland | 37.39M |
| 10 |  Romania | 19.04M |
| 11 |  Netherlands | 18.10M |
| 12 |  Belgium | 11.83M |
| 13 |  Czechia | 10.88M |
| 14 |  Portugal | 10.75M |
| 15 |  Sweden | 10.61M |
| 16 |  Greece | 10.40M |
| 17 |  Hungary | 9.54M |
| 18 |  Bulgaria | 6.44M |
| 19 |  Denmark | 6.01M |
| 20 |  Finland | 5.65M |
| 21 |  Norway | 5.61M |
| 22 |  Slovakia | 5.41M |
| 23 |  Croatia | 3.87M |
| 24 |  Lithuania | 2.89M |
| 25 |  Albania | 2.36M |
| 26 |  Slovenia | 2.13M |
| 27 |  Latvia | 1.83M |
| 28 |  North Macedonia | 1.82M |
| 29 |  Estonia | 1.37M |
| 30 |  Luxembourg | 682.0K |
| 31 |  Montenegro | 623.3K |
| 32 |  Iceland | 391.8K |
Frequently Asked Questions
How many countries are in NATO in 2024?
NATO has 32 member countries in 2024. Sweden became the 32nd member in March 2024.
Which were the original NATO members?
The 12 original NATO members (1949) were: USA, Canada, UK, France, Belgium, Netherlands, Luxembourg, Norway, Denmark, Iceland, Italy, and Portugal.
Which European countries are not in NATO?
European countries outside NATO include Austria, Switzerland, Ireland, Serbia, Bosnia and Herzegovina, Kosovo, Moldova, and several others.