The member states of NATO are:
Albania, Belgium, Bulgaria, Canada, Croatia, Czech Republic, Denmark, Estonia, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Lithuania, Luxembourg, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Turkey, United Kingdom, United States.
In the order of joining NATO:
1949 – Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, Netherlands, Norway, Portugal, United Kingdom, United States.
1952 – Greece, Turkey
1955 – Germany
1982 – Spain
1999 – Czech Republic, Hungary, Poland
2004 – Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia, Slovenia
2009 – Albania, Croatia
2017 – Montenegro
NATO partner countries are:
Armenia, Austria, Azerbaijan, Belarus, Bosnia and Herzegovina, Finland, Former Yugoslav Republic of Macedonia, Georgia, Ireland, Kazakhstan, Kyrghyz Republic, Malta, The Republic of Moldova, Russia, Serbia, Sweden, Switzerland, Tajikistan, Turkmenistan, Ukraine, Uzbekistan.