32 Members (excluding the associate or suspended members but including the countries represented on their behalf) [The rulers are not necessarily the representatives in the organisation. ] :
| | ALBANIA | (Tirana) | | President Ilir Meta | | |
| | AUSTRIA | (Vienna) | | President Alexander Van der Bellen | | |
| | BOSNIA AND HERZEGOVINA | (Sarajevo) | | President Dragan Chovich | | |
| | BULGARIA | (Sofia) | | President Rumen Radev | | |
| | CANADA | (Ottawa) | | Queen Elizabeth II | | |
| | SWITZERLAND | (Berne lq + Lausanne j) | | President Doris Leuthard | | |
| | CZECHIA | (Prague elr + Brno dj + Lany r) | | President Milos Zeman | | |
| | GERMANY | (Berlin ar + Bonn lr + Karlsruhe d) | | Bundespresident Frank-Walter Steinmeier | | |
| | DENMARK | (Copenhagen) | | Queen Margaret II | | |
| | SPAIN | (Madrid) | | King Philip VI | | |
| | EUROPEAN UNION | (Brussels a + Luxembourg j + Strasbourg l) | | President Jean-Claude Juncker | | |
| | FINLAND | (Helsinki a + Kultaranta s) | | President Sauli Niinisto | | |
| | FRANCE | (Paris) | | President Emmanuel Macron | | |
| | GREECE | (Athens a) | | President Prokopis Pavlopoulos | | |
| | CROATIA | (Zagreb) | | President Kolinda Grabar-Kitarovich | | |
| | HUNGARY | (Budapest a) | | President Janos Ader | | |
| | IRELAND | (Dublin) | | President Michael Daniel Higgins | | |
| | ITALY | (Rome a) | | President Sergio Mattarella | | |
| | LATVIA | (Riga) | | President Raimonds Vejonis | | |
| | MOLDOVA | (Chisinau) | | President Igor Dodon | | |
| | MONTENEGRO | (Podgoritsa a + Cetinje hr) | | President Filip Vujanovich | | |
| | MACEDONIA | (Skopje) | | President Gjorge Ivanov | | |
| | NORWAY | (Oslo) | | King Harald V | | |
| | POLAND | (Warsaw a) | | President Andrzej Duda | | |
| | ROMANIA | (Bucharest) | | President Klaus Iohannis | | |
| | SERBIA | (Belgrade) | | President Alexandar Vuchich | | |
| | SWEDEN | (Stockholm) | | King Charles XVI Gustav | | |
| | SLOVENIA | (Ljubljana) | | President Borut Pahor | | |
| | SLOVAKIA | (Bratislava a + Kosice d) | | President Andrej Kiska | | |
| | TURKEY | (Ankara a) | | President Recep Tayyip Erdogan | | |
| | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | Queen Elizabeth II | | |
| | AMERICA | (Washington-District of Columbia) | | President Donald Trump | | |