| Country |
Chief of State |
Head of Government |
| Afghanistan |
King Mohammed Zahir Shah |
Prime Minister Nour Ahmad Etemadi |
| Albania |
Communist Party First Secretary Enver Hoxha |
Prime Minister Mehmet Shehu |
| Algeria |
President Houari Boumedienne |
| Argentina |
President Juan Carlos Ongania |
| Australia |
Queen Elizabeth II of the United Kingdom |
Prime Minister Harold Holt
(from December ) John McEwen |
| Austria |
President Franz Jonas |
Chancellor Josef Klaus |
| Barbados |
Queen Elizabeth II of the United Kingdom |
Prime Minister Errol W. Barrow |
| Belgium |
King Baudouin I |
Prime Minister Paul Vanden Boeynants |
| Bhutan |
King Jigme Wangchuk |
| Bolivia |
President René Barrientos
Ortuño |
| Botswana |
President Sir Seretse Khama |
| Brazil |
President Humberto Castelo Branco
(from March 15) Arthur da Costa e Silva |
| Bulgaria |
Premier and Communist Party First
Secretary Todor Zhivkov |
| Burma |
Union Revolutionary Council
Chairman Ne Win |
| Burundi |
President Michel Micombero |
| Cambodia |
Prince Norodom Sihanouk |
| Cameroon |
President Ahmadou Ahidjo |
| Canada |
Queen Elizabeth II of the United Kingdom |
Prime Minister Lester B. Pearson |
| Central African Republic |
President Jean-Bédel Bokassa |
| Ceylon |
Queen Elizabeth II of the United Kingdom |
Prime Minister Dudley Senanayake |
| Chad |
President François Tombalbaye |
| Chile |
President Eduardo Frei Montalva |
| China, People's Republic
of |
Communist Party Chairman Mao Tse-tung |
Premier Chou En-lai |
| Colombia |
President Carlos Lleras Restrepo |
| Congo (Brazzaville) |
President Alphonse Massamba-Debat |
Prime Minister Ambroise Noumazalay |
| Congo (Kinshasa) |
President Joseph Mobutu |
| Costa Rica |
President Jose Joaquin Trejos |
| Cuba |
President Osvaldo Dorticos Torrado |
Premier Fidel Castro |
| Cyprus |
President Archbishop Makarios II |
| Czechoslovakia |
Communist Party First Secretary Antonin
Novotny |
|
| Dahomey |
President Christophe Soglo
(from December 21) Maurice Kouandété |
| Denmark |
King Frederik IX |
Prime Minister Jens Otto Krag |
| Dominican Republic |
President Joaquin Balaguer |
| Ecuador |
President Otto Arosemena Gomez |
| El Salvador |
President Julio Adalberto Rivera |
| Ethiopia |
Emperor Haile Selassie I |
Prime Minister T. T. Akilou Abte-Wold |
| Finland |
President Urho Kekkonen |
|
| France |
President Charles de Gaulle |
| Gabon |
President Léon M'Ba
(from December 2) Albert Bernard Bongo |
| Gambia |
Queen Elizabeth II of the United Kingdom |
Prime Minister David K. Jawara |
| Germany, East |
Communist Party First Secretary
Walter Ulbricht |
| Germany, West |
President Heinrich Lübke |
Kurt Kiesinger |
| Ghana |
National Liberation Council
Chairman Joseph A. Ankrah |
| Greece |
King Constantine II |
Premier Panayotis Kanellopoulos
(from April 21) Constantine V. Kollias
(from December ) George Papadopoulos |
| Guatemala |
President Julio Mendez Montenegro |
| Guyana |
Queen Elizabeth II of the United Kingdom |
Prime Minister Forbes Burnham |
| Guinea |
President Sékou Touré |
| Haiti |
President François Duvalier |
| Honduras |
President Osvaldo Lopez Arrellano |
| Hungary |
Communist Party First Secretary Janos Kadar |
|
| Iceland |
President Ásgeir Ásgeirsson |
Premier Bjarni Benediktsson |
| India |
President Zakir Husain |
Prime Minister Indira Gandhi |
| Indonesia |
President Sukarno
(from March 12) General Suharto |
| Iran |
Shah Mohammad Reza Pahlavi |
Premier Amir Abbas Hoveida |
| Iraq |
President Abdul Rahman Arif |
| Ireland |
President Eamon de Valera |
Prime Minister John M. Lynch |
| Israel |
President Schneor Zalman Shazar |
Prime Minister Levi Eshkol |
| Italy |
President Giuseppe Saragat |
Premier Aldo Moro |
| Ivory Coast |
President Felix Houphouet-Boigny |
| Jamaica |
|
Prime Minister Alexander Bustamante
(from April 1) Hugh Shearer |
| Japan |
Emperor Hirohito |
Prime Minister Eisaku Sato |
| Jordan |
King Hussein I |
Premier Saad Jumaa |
| Kenya |
President Jomo Kenyatta |
| Korea, North |
Premier Kim Il Sung |
| Korea, South |
President Chung Hee Park |
Prime Minister Chung Il Kwon |
| Kuwait |
Sheik Sabah al-Salem al-Sabah |
| Laos |
King Savang Vatthana |
Premier Souvanna Phouma |
| Lebanon |
President Charles Helou |
Prime Minister Rashid Karami |
| Lesotho |
King Motlotlehi Moshoeshoe II |
Prime Minister Leabua Jonathan |
| Liberia |
President William V. S. Tubman |
| Libya |
King Mohammed Idris et Senussi |
Prime Minister Abd Al-Qadir Badri
(from ) Hussein Mazik |
| Lixembourg |
Grand Duke Jean |
Prime Minister Pierre Werner |
| Malagasy Republic |
President Philibert Tsiranana |
| Malawi |
President Hastings Kamuzu Banda |
| Malaysia |
|
Prime Minister Tunku Abdul Rahman |
| Maldive Islands |
Sultan Mohammed Farid Didi I |
Prime Minister Ibrahim Nasir |
| Mali |
President Modibo Keita |
| Malta |
Queen Elizabeth II of the United Kingdom |
Prime Minister Giorgio B. Olivier |
| Mauritania |
President Moktar Ould Daddah |
| Mexico |
President Gustavo Diaz Ordaz |
| Mongolia |
Zhamsarangin Sambu |
Premier Yumzhagiyn Tsedenbal |
| Morocco |
King Hassan II |
| Muscat and Oman |
Sultan Said ibn Taimur |
| Nepal |
King Mahendra Bir Bikram Shah Deva |
Prime Minister Surya Bahadur Thapa |
| Netherlands |
Queen Juliana |
Premier
(from April 4) Petrus J. S. de Jong |
| New Zealand |
Queen Elizabeth II of the United Kingdom |
Prime Minister Keith J. Holyoake |
| Nicaragua |
President Anastasio Somoza
Debayle |
| Niger |
President Hamani Diori |
| Nigeria |
Federal Military Government Head
Yakubu Gowon |
| Norway |
King Olav V |
Prime Minister Per Borten |
| Pakistan |
President Mohammad Ayub Khan |
| Panama |
President Marco A. Robles |
| Paraguay |
President Alfredo Stroessner |
| Peru |
President Fernando Belaúnde Terry |
| Philippines |
President Ferdinand E. Marcos |
| Poland |
Communist Party First Secretary Wladyslaw
Gomulka |
|
| Portugal |
|
Premier Antonio Salazar |
| Rhodesia |
|
Prime Minister Ian D. Smith |
| Romania |
Communist Party First Secretary Nicolae
Ceausescu |
|
| Rwanda |
President Grégoire Kayibanda |
| Saudi Arabia |
King Faisal |
| Senegal |
President Léopold Sédar Senghor |
| Sierra Leone |
Queen Elizabeth II of the United Kingdom
(from March 23) Brigadier General David Lansana
(from March 28) National Reformation Council
Chairman Andrew T. Juxon-Smith |
Prime Minister Sir Albert Margai
(from March 21) vacant |
| Singapore |
President Tusof bin Ishak |
Prime Minister Lee Kuan Yew |
| Somalia |
President Abdirascid Ali Shermarke |
Prime Minister Mohammed Ibrahim Egal |
| South Africa |
President Jozua F. T. Naude |
Prime Minister Balthazar Johannes Vorster |
| Soviet Union |
First Secretary of the Communist Party Leonid
I. Brezhnev |
Premier Alexei N. Kosygin |
| Spain |
Francisco Franco |
| Sudan |
Supreme Council of State President Ismail
al-Azhari |
Prime Minister Mohammed Ahmed Mahgoub |
| Swaziland |
King Sobhuza II |
Prime Minister Prince Makhosini Dlamini |
| Sweden |
King Gustaf VI |
Prime Minister Tage Erlander |
| Switzerland |
President Willy Spühler |
|
| Syria |
Nureddin al-Atassi |
Premier Yussef Zayen |
| Tanzania |
President Julius K. Nyerere |
| Thailand |
King Bhumibol Adulyadej |
Prime Minister Thanom Kittikachorn |
| Trinidad and Tobago |
Queen Elizabeth II of the United Kingdom |
Prime Minister Eric Williams |
| Togo |
President Nicholas Grunitzky
(from January 14) Kléber Dadjo
(from April 14) Étienne Eyadéma |
| Tunisia |
President Habib Bourguiba |
| Turkey |
President Cevdet Sunay |
Premier Suleyman Demirel |
| Uganda |
President A. Milton Obote |
| United Arab Republic |
President Gamal Abdel Nasser |
| United Kingdom |
Queen Elizabeth II |
Prime Minister Harold Wilson |
| United States |
President Lyndon B. Johnson |
| Upper Volta |
President Sangoulé Lamizana |
| Uruguay |
President Alberto Héber Usher
(from March 1) Oscar D. Gestido
(from December 6) Jorge Pacheco Areco |
| Venezuela |
President Raul Leoni |
| Vietnam, North |
President Ho Chi Minh |
Premier Pham Van Dong |
| Vietnam, South |
President Nguyen Van Thieu |
| Yemen |
President Abdullah al-Salal
(from November ) Abdul Rahman al-Iryani |
Premier Mohsen al-Aini |
| Yemen, Southern |
President Qahtan al-Shaabi |
| Yugoslavia |
President Josip Broz Tito |
| Zambia |
President Kenneth David Kaunda |
