52 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 |  | |
 |  | ARMENIA | (Erevan) |  | President Serge Sarkisyan |  | |
 |  | AUSTRIA | (Vienna) |  | President Alexander Van der Bellen | | |
 |  | AZERBAIJAN | (Baku) |  | President Iham Aliyev | | |
 |  | BOSNIA AND HERZEGOVINA | (Sarajevo) |  | President Bakir Izetbegovich | | |
 |  | BELGIUM | (Brussels) |  | King Philippe | | |
 |  | BULGARIA | (Sofia) |  | President Rumen Radev | | |
 |  | BELARUS | (Minsk) |  | President Alexander Lukashenko | | |
 |  | CANADA | (Ottawa) |  | Queen Elizabeth II |  | |
 |  | SWITZERLAND | (Berne lq + Lausanne j) |  | President Alain Berset | | |
 |  | 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 | | |
 |  | NATO | (Brussels) |  | SG Jens Stoltenberg (no) | | |
 |  | ESTONIA | (Tallinn a + Tartu b) |  | President Kersti Kaljulaid | | |
 |  | SPAIN | (Madrid) |  | King Philip VI | | |
 |  | FINLAND | (Helsinki a + Kultaranta s) |  | President Sauli Niinisto | | |
 |  | FRANCE | (Paris) |  | President Emmanuel Macron | | |
 |  | GEORGIA | (Tbilisi a + Kutaisi l + Batumi d) |  | President Giorgi Margvelashvili | | |
 |  | GREECE | (Athens a) |  | President Prokopis Pavlopoulos | | |
 |  | CROATIA | (Zagreb) |  | President Kolinda Grabar-Kitarovich | | |
 |  | HUNGARY | (Budapest a) |  | President Janos Ader | | |
 |  | IRELAND | (Dublin) |  | President Michael Daniel Higgins | | |
 |  | ICELAND | (Reykjavik a + Alftanes r) |  | President Gudhni Thorlacius Johannesson | | |
 |  | ITALY | (Rome a) |  | President Sergio Mattarella | | |
 |  | KYRGYZSTAN | (Bishkek) |  | President Sooronbay Jeenbekov | | |
 |  | KAZAKHSTAN | (Astana a) |  | President Elbashy Nursultan Nazarbayev | | |
 |  | LITHUANIA | (Vilnius) |  | President Dalia Grybauskaite | | |
 |  | LUXEMBOURG | (Luxembourg a) |  | Grand Duke Henri | | |
 |  | LATVIA | (Riga) |  | President Raimonds Vejonis | | |
 |  | MOLDOVA | (Chisinau) |  | President Igor Dodon | | |
 |  | MONTENEGRO | (Podgoritsa a + Cetinje hr) |  | President Filip Vujanovich | | |
 |  | MACEDONIA | (Skopje) |  | President Gjorge Ivanov | | |
 |  | MALTA | (Valletta a + Attard r + Siggiewi s) |  | President Marie-Louise Coleiro Preca |  | |
 |  | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) |  | King Willem-Alexander | | |
 |  | NORWAY | (Oslo) |  | King Harald V | | |
 |  | POLAND | (Warsaw a) |  | President Andrzej Duda | | |
 |  | PORTUGAL | (Lisbon) |  | President Marcelo Rebelo de Sousa | | |
 |  | ROMANIA | (Bucharest) |  | President Klaus Iohannis | | |
 |  | SERBIA | (Belgrade) |  | President Alexandar Vuchich | | |
 |  | RUSSIA | (Moscow a + Saint Petersburg d) |  | President Vladimir Putin | | |
 |  | SWEDEN | (Stockholm) |  | King Charles XVI Gustav | | |
 |  | SLOVENIA | (Ljubljana) |  | President Borut Pahor | | |
 |  | SLOVAKIA | (Bratislava a + Kosice d) |  | President Andrej Kiska | | |
 |  | INDEPENDENT STATES | (Minsk + Moscow) |  | Secretary Sergey Lebedev | | |
 |  | TAJIKISTAN | (Dushanbe) |  | President Emomali Rakhmonov | | |
 |  | TURKMENISTAN | (Ashgabat) |  | President Arkadag Gurbanguly Berdymukhammedov | | |
 |  | TURKEY | (Ankara a) |  | President Recep Tayyip Erdogan | | |
 |  | UKRAINE | (Kiev) |  | President Petro Poroshenko | | |
 |  | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | Queen Elizabeth II | | |
 |  | AMERICA | (Washington-District of Columbia) |  | President Donald Trump | | |
 |  | UZBEKISTAN | (Tashkent a) |  | Shavkat Mirziyayev | | |
