| Country | Govt Type | Head of State | Head of Government |
|---|---|---|---|
| Afghanistan | Presidential Islamic republic | President - Ashraf Ghani | Chief Executive Officer - Abdullah Abdullah |
| Albania | Parliamentary republic | President - Bujar Nishani | Prime Minister - Edi Rama |
| Algeria | Presidential republic | President - Abdelaziz Bouteflika | Prime Minister - Abdelmalek Sellal |
| Andorra | Unitary parliamentary Semi-Elective diarchy | Episcopal Co-Prince - Joan Enric Vives Sicília Co-Prince's Representative - Josep Maria Mauri French Co-Prince - François Hollande Co-Prince's Representative - Jean-Pierre Hugues |
Head of Government - Antoni Martí |
| Angola | Presidential republic | President - Jose Eduardo dos Santos | |
| Antigua and Barbuda | Parliamentary democracy (Parliament) under a constitutional monarchy; a Commonwealth realm | Queen - Elizabeth II, Governor-General - Sir Rodney Williams | Prime Minister - Gaston Browne |
| Argentina | Presidential republic | President - Mauricio Macri | |
| Armenia | Semi-presidential republic | President - Serzh Sargsyan | Prime Minister - Karen Karapetyan |
| Australia | Parliamentary democracy (Federal Parliament) under a constitutional monarchy; a Commonwealth realm | Queen - Elizabeth II, Governor-General - Sir Peter Cosgrove | Prime Minister - Malcolm Turnbull |
| Austria | Federal parliamentary republic | Federal President - Alexander Van der Bellen | Federal Chancellor - Christian Kern |
| Azerbaijan | Presidential republic | President - Ilham Aliyev | Prime Minister - Artur Rasizade |
| Bahamas,The | Parliamentary democracy (Parliament) under a constitutional monarchy; a Commonwealth realm | Queen - Elizabeth II, Governor-General - Dame Marguerite Pindling | Prime Minister - Perry Christie |
| Bahrain | Constitutional monarchy | King - Sheikh Hamad bin Isa Al Khalifa | Prime Minister - Prince Khalifa bin Salman Al Khalifa |
| Bangladesh | Parliamentary republic | President - Abdul Hamid | Prime Minister - Sheikh Hasina |
| Barbados | Parliamentary democracy (Parliament) under a constitutional monarchy; a Commonwealth realm | Queen - Elizabeth II, Governor-General - Sir Elliott Belgrave | Prime Minister - Freundel Stuart |
| Belarus | Presidential republic in name, although in fact a dictatorship | President - Alexander Lukashenko | Prime Minister - Andrei Kobyakov |
| Belgium | Federal parliamentary democracy under a constitutional monarchy | King - Philippe | Prime Minister - Charles Michel |
| Belize | Parliamentary democracy (National Assembly) under a constitutional monarchy; a Commonwealth realm | Queen - Elizabeth II, Governor-General - Sir Colville Young | Prime Minister - Dean Barrow |
| Benin | Presidential republic | President - Patrice Talon | |
| Bhutan | Constitutional monarchy | King - Jigme Khesar Namgyel Wangchuck | Prime Minister - Tshering Tobgay |
| Bolivia | Presidential republic | President - Evo Morales | |
| Bosnia and Herzegovina | Parliamentary republic | Mladen Ivanic (as Chairman), Dragan Covic (as Member) Bakir Izetbegović (as Member) | Chairman of the Council of Ministers - Denis Zvizdic |
| Botswana | Parliamentary republic | President - Ian Khama | |
| Brazil | Federal presidential republic | President - Michel Temer | |
| Brunei | Absolute monarchy or sultanate (locally known as Malay Islamic Monarchy) | Sultan and Prime Minister - Hassanal Bolkiah | |
| Bulgaria | Parliamentary republic | President - Rumen Radev | Acting Prime Minister - Ognyan Gerdzhikov |
| Burkina Faso | Presidential republic | President - Roch Marc Christian Kabore | Prime Minister - Paul Kaba Thieba |
| Burundi | Presidential republic | President - Pierre Nkurunziza | |
| Cambodia | Parliamentary constitutional monarchy | King - Norodom Sihamoni | Prime Minister - Hun Sen |
| Cameroon | Presidential republic | President - Paul Biya | Prime Minister - Philemon Yang |
| Canada | Federal parliamentary democracy (Parliament of Canada) under a constitutional monarchy; a Commonwealth realm | Queen - Elizabeth II, Governor General - David Johnston | Prime Minister - Justin Trudeau |
| Cape Verde | Unitary semi-presidential republic | President - Jorge Carlos Fonseca | Prime Minister - Ulisses Correia e Silva |
| Central African Republic | Presidential republic | President - Faustin-Archange Touadera | Prime Minister - Simplice Sarandji |
| Chad | Presidential republic | President - Idriss Deby | Prime Minister - Albert Pahimi Padacke |
| Chile | Presidential republic | President - Michelle Bachelet | |
| China | Communist state | President - Xi Jinping | Premier of the State Council - Li Keqiang |
| Colombia | Presidential republic | President - Juan Manuel Santos | |
| Comoros | Federal presidential republic | President - Azali Assoumani | |
| Congo,Democratic Republic of the | Semi-presidential republic | President - Joseph Kabila | Prime Minister - Samy Badibanga |
| Congo,Republic of the | Presidential republic | President - Denis Sassou Nguesso | Prime Minister - Clement Mouamba |
| Costa Rica | Presidential republic | President - Luis Guillermo Solís | |
| Croatia | Parliamentary republic | President - Kolinda Grabar-Kitarovic | Prime Minister - Andrej Plenkovic |
| Cuba | Communist state | First Secretary of the Communist Party - Raul Castro | |
| Cyprus | Unitary presidential constitutional republic | President - Nicos Anastasiades | |
| Czech Republic | Unitary parliamentary constitutional republic | President - Milos Zeman | Prime Minister - Bohuslav Sobotka |
| Denmark | Parliamentary constitutional monarchy | Queen - Margrethe II | Prime Minister - Lars Lokke Rasmussen |
| Djibouti | Semi-presidential republic | President - Ismaïl Omar Guelleh | Prime Minister - Abdoulkader Kamil Mohamed |
| Dominica | Parliamentary republic | President - Charles Savarin | Prime Minister - Roosevelt Skerrit |
| Dominican Republic | Presidential republic | President - Danilo Medina | |
| East Timor | President - Taur Matan Ruak | Prime Minister - Rui Maria de Araujo | |
| Ecuador | Presidential republic | President - Rafael Correa | |
| Egypt | Presidential republic | President - Abdel Fattah el-Sisi | Prime Minister - Sherif Ismail |
| El Salvador | Presidential republic | President - Salvador Sanchez Ceren | |
| Equatorial Guinea | Presidential republic | President - Teodoro Obiang Nguema Mbasogo | Prime Minister - Francisco Pascual Obama Asue |
| Eritrea | Presidential republic | President - Isaias Afwerki | |
| Estonia | Parliamentary republic | President - Kersti Kaljulaid | Prime Minister - Juri Ratas |
| Ethiopia | Federal parliamentary republic | President - Mulatu Teshome | Prime Minister - Hailemariam Desalegn |
| Fiji | Parliamentary republic | President - George Konrote | Prime Minister - Frank Bainimarama |
| Finland | Parliamentary republic | President - Sauli Niinisto | Prime Minister - Juha Sipila |
| France | Semi-presidential republic | President - Emmanuel Macron | Prime Minister - Édouard Philippe |
| Gabon | Presidential republic | President - Ali Bongo Ondimba | Prime Minister - Emmanuel Issoze-Ngondet |
| Gambia,The | Presidential republic | President - Adama Barrow | |
| Georgia | Semi-presidential republic | President - Giorgi Margvelashvili | Prime Minister - Giorgi Kvirikashvili |
| Germany | Federal parliamentary republic | President - Frank-Walter Steinmeier | Chancellor - Angela Merkel |
| Ghana | Presidential republic | President - Nana Akufo-Addo | |
| Greece | Parliamentary republic | President - Prokopis Pavlopoulos | Prime Minister - Alexis Tsipras |
| Grenada | Parliamentary democracy under constitutional monarchy | Queen - Elizabeth II, Governor-General - Dame Cecile La Grenade | Prime Minister - Keith Mitchell |
| Guatemala | Presidential republic | President - Jimmy Morales | |
| Guinea | Presidential republic | President - Alpha Conde | Prime Minister - Mamady Youla |
| Guinea-Bissau | Semi-presidential republic | President - Jose Mario Vaz | Prime Minister - Umaro Sissoco Embalo |
| Guyana | Parliamentary republic | President - David A. Granger | Prime Minister - Moses Nagamootoo |
| Haiti | Semi-presidential republic | President - Jovenel Moïse | Prime Minister - Jack Guy Lafontant |
| Honduras | Presidential republic | President - Juan Orlando Hernandez | |
| Hungary | Parliamentary republic | President - Janos Ader | Prime Minister - Viktor Orban |
| Iceland | Parliamentary republic | President - Guoni Th. Johannesson | Prime Minister - Bjarni Benediktsson |
| India | Federal parliamentary republic | President - Ram Nath Kovind | Prime Minister - Narendra Modi |
| Indonesia | Presidential republic | President - Joko Widodo | |
| Iran | Theocratic republic | Supreme Leader - Ayatollah Ali Khamenei, President - Hassan Rouhani | |
| Iraq | Federal parliamentary republic | President - Fuad Masum | Prime Minister - Haider al-Abadi |
| Ireland | Parliamentary republic | President - Michael D. Higgins | Taoiseach - Enda Kenny |
| Israel | Parliamentary democracy | President - Reuven Rivlin | Prime Minister - Benjamin Netanyahu |
| Italy | Parliamentary republic | President - Sergio Mattarella | Prime Minister - Paolo Gentiloni |
| Ivory Coast | President - Alassane Ouattara | Prime Minister - Amadou Gon Coulibaly | |
| Jamaica | Unitary parliamentary constitutional monarchy | Queen - Elizabeth II, Governor-General - Sir Patrick Allen | Prime Minister - Andrew Holness |
| Japan | Parliamentary constitutional monarchy | Emperor - Akihito | Prime Minister - Shinzo Abe |
| Jordan | Parliamentary constitutional monarchy | King - Abdullah | Prime Minister - Hani Al-Mulki |
| Kazakhstan | Presidential republic | President - Nursultan Nazarbayev | Prime Minister - Bakhytzhan Sagintayev |
| Kenya | Presidential republic | President - Uhuru Kenyatta | |
| Kiribati | Presidential republic | President - Taneti Mamau | |
| Kuwait | Constitutional monarchy | Emir - Sheikh Sabah Al-Ahmad Al-Jaber Al-Sabah | Prime Minister - Sheikh Jaber Al-Mubarak Al-Hamad Al-Sabah |
| Kyrgyzstan | Parliamentary republic | President - Almazbek Atambayev | Prime Minister - Sooronbay Jeenbekov |
| Laos | Communist state | President - Bounnhang Vorachith | Prime Minister - Thongloun Sisoulith |
| Latvia | Parliamentary republic | President - Raimonds Vejonis | Prime Minister - Maris Kucinskis |
| Lebanon | Parliamentary republic | President - Michel Aoun | Prime Minister - Saad Hariri |
| Lesotho | Parliamentary constitutional monarchy | King - Letsie | Prime Minister - Pakalitha Mosisili |
| Liberia | Presidential republic | President - Ellen Johnson Sirleaf | |
| Libya | Provisional government | Chairman of the Presidential Council and Prime Minister - Fayez al-Sarraj | |
| Liechtenstein | Constitutional monarchy | Prince - Hans-Adam, Regent - Hereditary Prince Alois | Head of Government - Adrian Hasler |
| Lithuania | Semi-presidential republic | President - Dalia Grybauskaite | Prime Minister - Saulius Skvernelis |
| Luxembourg | Constitutional monarchy | Grand Duke - Henri | Prime Minister - Xavier Bettel |
| Macedonia | Parliamentary republic | President - Gjorge Ivanov | Interim Prime Minister - Emil Dimitriev |
| Madagascar | Semi-presidential republic | President - Hery Rajaonarimampianina | Prime Minister - Olivier Mahafaly Solonandrasana |
| Malawi | Presidential republic | President - Peter Mutharika | |
| Malaysia | Federal constitutional monarchy | Yang di-Pertuan Agong - Muhammad V | Prime Minister - Mahathir Bin Mohamad |
| Maldives | Presidential republic | President - Abdulla Yameen | |
| Mali | Semi-presidential republic | President - Ibrahim Boubacar Keïta | Prime Minister - Modibo Keita |
| Malta | Parliamentary republic | President - Marie Louise Coleiro Preca | Prime Minister - Joseph Muscat |
| Marshall Islands | Presidential republic in free association with the US | President - Hilda Heine | |
| Mauritania | Presidential republic | President - Mohamed Ould Abdel Aziz | Prime Minister - Yahya Ould Hademine |
| Mauritius | Parliamentary republic | President - Ameenah Gurib | Prime Minister - Pravind Jugnauth |
| Mexico | Federal presidential republic | President - Enrique Pena Nieto | |
| Micronesia | Federal parliamentary republic Under a Non-partisan democracy | President - Peter M. Christian | |
| Moldova | Parliamentary republic | President - Igor Dodon | Prime Minister - Pavel Filip |
| Monaco | Constitutional monarchy | Sovereign Prince - Albert II | Minister of State - Serge Telle |
| Mongolia | Semi-presidential republic | President - Tsakhiagiin Elbegdorj | Prime Minister - Jargaltulgyn Erdenebat |
| Montenegro | Parliamentary republic | President - Filip Vujanovic | Prime Minister - Dusko Markovic |
| Morocco | Parliamentary constitutional monarchy | King - Mohammed VI | Head of Government - Saadeddine Othmani |
| Mozambique | Presidential republic | President - Filipe Nyusi | Prime Minister - Carlos Agostinho do Rosario |
| Myanmar | Unitary parliamentary constitutional republic | President - Htin Kyaw | State Counsellor - Aung San Suu Kyi |
| Namibia | Presidential republic | President - Hage Geingob | Prime Minister - Saara Kuugongelwa |
| Nauru | Parliamentary republic | President - Baron Waqa | |
| Nepal | Federal parliamentary republic | President - Bidhya Devi Bhandari | Prime Minister - Pushpa Kamal Dahal |
| Netherlands | Parliamentary constitutional monarchy; part of the Kingdom of the Netherlands | King - Willem-Alexander | Prime Minister - Mark Rutte |
| New Zealand | Unitary parliamentary constitutional monarchy | Queen - Elizabeth II, Governor-General - Dame Patsy Reddy | Prime Minister - Bill English |
| Nicaragua | Presidential republic | President - Daniel Ortega | |
| Niger | Semi-presidential republic | President - Mahamadou Issoufou | Prime Minister - Brigi Rafini |
| Nigeria | Federal presidential republic | President - Muhammadu Buhari | |
| North Korea | Unitary one-party socialist republic | Supreme Leader and Chairman of the State Affairs Commission - Kim Jong-un | Premier of the Cabinet - Pak Pong-ju |
| Norway | Parliamentary constitutional monarchy | King - Harald V | Prime Minister - Erna Solberg |
| Oman | Absolute monarchy | Sultan and Prime Minister - Qaboos bin Said al Said | |
| Pakistan | Federal parliamentary republic | President - Mamnoon Hussain | Prime Minister - Shahid Khaqan Abbasi |
| Palau | Presidential republic in free association with the US | President - Tommy Remengesau | |
| Palestine | Parliamentary republic, semi-presidential multi-party republic | President - Mahmoud Abbas | Prime Minister - Rami Hamdallah |
| Panama | Presidential republic | President - Juan Carlos Varela | |
| Papua New Guinea | Unitary parliamentary constitutional monarchy | Queen - Elizabeth II, Governor-General - Bob Dadae | Prime Minister - Peter O'Neill |
| Paraguay | Presidential republic | President - Horacio Cartes | |
| Peru | Presidential republic | President - Pedro Pablo Kuczynski | Prime Minister - Fernando Zavala |
| Philippines | Presidential republic | President - Rodrigo Duterte | |
| Poland | Parliamentary republic | President - Andrzej Duda | Prime Minister - Beata Szydło |
| Portugal | Semi-presidential republic | President - Marcelo Rebelo de Sousa | Prime Minister - Antonio Costa |
| Qatar | Absolute monarchy | Emir - Sheikh Tamim bin Hamad Al Thani | Prime Minister - Sheikh Abdullah bin Nasser bin Khalifa Al Thani |
| Romania | Semi-presidential republic | President - Klaus Iohannis | Prime Minister - Sorin Grindeanu |
| Russia | Semi-presidential federation | President - Vladimir Putin | Prime Minister - Dmitry Medvedev |
| Rwanda | Presidential republic | President - Paul Kagame | Prime Minister - Anastase Murekezi |
| Saint Kitts and Nevis | Federal parliamentary constitutional monarchy | Queen - Elizabeth II, Governor-General - Sir Tapley Seaton | Prime Minister - Timothy Harris |
| Saint Lucia | Parliamentary democracy under constitutional monarchy | Queen - Elizabeth II, Governor-General - Dame Pearlette Louisy | Prime Minister - Allen Chastanet |
| Samoa | Parliamentary republic | O le Ao o le Malo - Tufuga Efi | Prime Minister - Tuilaepa Aiono Sailele Malielegaoi |
| San Marino | Parliamentary republic | Captain Regent - Marino Riccardi, Captain Regent - Fabio Berardi | |
| Sao Tome and Principe | semi-presidential republic | President - Evaristo Carvalho | Prime Minister - Patrice Trovoada |
| Saudi Arabia | Absolute monarchy | King and Prime Minister - Salman | |
| Senegal | Presidential republic | President - Macky Sall | Prime Minister - Mohammed Dionne |
| Serbia | Parliamentary republic | President - Tomislav Nikolic | Prime Minister - Aleksandar Vucic |
| Seychelles | Presidential republic | President - Danny Faure | |
| Sierra Leone | Presidential republic | President - Ernest Bai Koroma | |
| Singapore | Parliamentary republic | President - Tony Tan | Prime Minister - Lee Hsien Loong |
| Slovakia | Parliamentary republic | President - Andrej Kiska | Prime Minister - Robert Fico |
| Slovenia | Parliamentary republic | President - Borut Pahor | Prime Minister - Miro Cerar |
| Solomon Islands | Unitary parliamentary constitutional monarchy | Queen - Elizabeth II, Governor-General - Sir Frank Kabui | Prime Minister - Manasseh Sogavare |
| Somalia | Federal parliamentary republic | President - Mohamed Abdullahi Mohamed | Prime Minister - Hassan Ali Khayre |
| South Africa | Parliamentary republic | President - Jacob Zuma | |
| South Korea | President and Prime Minister - Hwang Kyo-ahn | ||
| South Sudan | Presidential republic | President - Salva Kiir Mayardit | |
| Spain | Parliamentary constitutional monarchy | King - Felipe VI | President of the Government - Mariano Rajoy |
| Sri Lanka | Presidential republic | President - Maithripala Sirisena | Prime Minister - Ranil Wickremesinghe |
| Sudan | Presidential republic | President - Omar al-Bashir | Prime Minister - Bakri Hassan Saleh |
| Suriname | Presidential republic | President - Desi Bouterse | |
| Swaziland | Absolute monarchy | King - Mswati III | Prime Minister - Barnabas Sibusiso Dlamini |
| Sweden | Parliamentary constitutional monarchy | King - Carl XVI Gustaf | Prime Minister - Stefan Lofven |
| Switzerland | Federal republic (formally a confederation) | Doris Leuthard (as President), Alain Berset (as Vice President) Ueli Maurer (as Member) Didier Burkhalter (as Member) Simonetta Sommaruga (as Member) Johann Schneider-Ammann (as Member) Guy Parmelin (as Member) | |
| Syria | Presidential republic; highly authoritarian regime | President - Bashar al-Assad | Prime Minister - Imad Khamis |
| Tajikistan | Presidential republic | President - Emomali Rahmon | Prime Minister - Kokhir Rasulzoda |
| Tanzania | Presidential republic | President - John Magufuli | Prime Minister - Kassim Majaliwa |
| Thailand | Constitutional monarchy; note - interim military-affiliated government since May 2014 | King - Maha Vajiralongkorn | Prime Minister - Prayut Chan-o-cha |
| Togo | Presidential republic | President - Faure Gnassingbe | Prime Minister - Komi Selom Klassou |
| Tonga | Constitutional monarchy | King - Tupou VI | Prime Minister - Akilisi Pohiva |
| Trinidad and Tobago | Parliamentary republic | President - Anthony Carmona | Prime Minister - Keith Rowley |
| Tunisia | Parliamentary republic | President - Beji Caid Essebsi | Head of Government - Youssef Chahed |
| Turkey | Parliamentary republic | President - Recep Tayyip Erdogan | Prime Minister - Binali Yıldırım |
| Turkmenistan | Presidential republic; highly authoritarian | President - Gurbanguly Berdimuhamedow | |
| Tuvalu | Non-partisan parliamentary democracy under constitutional monarchy | Queen - Elizabeth II, Governor-General - Sir Iakoba Italeli | Prime Minister - Enele Sopoaga |
| Uganda | Presidential republic | President - Yoweri Museveni | Prime Minister - Ruhakana Rugunda |
| Ukraine | Semi-presidential republic | President - Petro Poroshenko | Prime Minister - Volodymyr Groysman |
| United Arab Emirates | Federation of monarchies | President - Sheikh Khalifa bin Zayed Al Nahyan | Prime Minister - Sheikh Mohammed bin Rashid Al Maktoum |
| United Kingdom | Unitary parliamentary constitutional monarchy | Queen - Elizabeth II | Prime Minister - Theresa May |
| United States | Constitutional federal republic | President - Donald Trump | |
| Uruguay | Presidential republic | President - Tabare Vazquez | |
| Uzbekistan | Presidential republic; highly authoritarian | President - Shavkat Mirziyoyev | Prime Minister - Abdulla Aripov |
| Vanuatu | Parliamentary republic | President - Baldwin Lonsdale | Prime Minister - Charlot Salwai |
| Venezuela | Federal presidential republic | President - Nicolas Maduro | |
| Vietnam | Communist state | President - Tran Dại Quang | Prime Minister - Nguyen Xuan Phúc |
| Yemen | in transition (Provisional government) | President - Abdrabbuh Mansur Hadi | Prime Minister - Ahmed Obeid bin Daghr |
| Zambia | Presidential republic | President - Edgar Lungu | |
| Zimbabwe | Semi-presidential republic | President - Emmerson Mnangagwa |
** Information current June, 2018