Sovereign-state flags in 1966

Sovereign states

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Afghanistan
 
Albania
 
Algeria
 
Andorra
 
Argentina
 
Armenian Soviet Socialist Republic
 
Australia
 
Austria
 
Azerbaijan Soviet Socialist Republic
 
Barbados (from 30 November)
 
Belgium
 
Bhutan
 
Bolivia
 
Botswana (from 30 September)
 
Brazil
 
Bulgaria
 
Burma
 
Burundi (until 28 November)
 
Burundi (28 November to 29 November)
 
Burundi (from 29 November)
 
Byelorussian Soviet Socialist Republic
 
Cambodia
 
Cameroon
 
Canada
 
Central African Republic
 
Ceylon
 
Chad
 
Chile
 
People's Republic of China
 
Republic of China
 
Colombia
 
Republic of the Congo
 
Democratic Republic of the Congo (until mid-1966)
 
Democratic Republic of the Congo (from mid-1966)
 
Costa Rica
 
Cuba
 
Cyprus
 
Czechoslovakia
 
Dahomey
 
Denmark
 
Dominican Republic
 
Ecuador
 
El Salvador
 
Estonian Soviet Socialist Republic
 
Ethiopia
 
Finland
 
France
 
Gabon
 
Gambia
 
East Germany
 
West Germany
 
Georgian Soviet Socialist Republic
 
Ghana (until 28 February)
 
Ghana (from 28 February)
 
Greece
 
Guatemala
 
Guinea
 
Guyana (from 26 May)
 
Haiti
 
Honduras
 
Hungary
 
Iceland
 
India
 
Indonesia
 
Iran
 
Iraq
 
Ireland
 
Israel
 
Italy
 
Ivory Coast
 
Jamaica
 
Japan
 
Jordan
 
Kazakh Soviet Socialist Republic
 
Kenya
 
Kirghiz Soviet Socialist Republic
 
North Korea
 
South Korea
 
Kuwait
 
Laos
 
Latvian Soviet Socialist Republic
 
Lebanon
 
Lesotho (from 4 October)
 
Liberia
 
Libya
 
Liechtenstein
 
Lithuanian Soviet Socialist Republic
 
Luxembourg
 
Malagasy Republic
 
Malawi
 
Malaysia
 
Maldive Islands
 
Mali
 
Malta
 
Mauritania
 
Mexico
 
Moldavian Soviet Socialist Republic
 
Monaco
 
Mongolia
 
Morocco
 
Muscat and Oman
 
Nepal
 
Netherlands
 
New Zealand
 
Nicaragua
 
Niger
 
Nigeria
 
Norway
 
Pakistan
 
Panama
 
Paraguay
 
Paraguay
 
Peru
 
Philippines
 
Poland
 
Portugal
 
Rhodesia
 
Romania
 
Russian Soviet Federative Socialist Republic
 
Rwanda
 
San Marino
 
Saudi Arabia
 
Senegal
 
Sierra Leone
 
Singapore
 
Somalia
 
South Africa
 
Spain
 
Sudan
 
Sweden
 
Switzerland
 
Syria
 
Tajik Soviet Socialist Republic
 
Tanzania
 
Thailand
 
Togo
 
Trinidad and Tobago
 
Tunisia
 
Turkey
 
Turkmen Soviet Socialist Republic
 
Uganda
 
Ukrainian Soviet Socialist Republic
 
Union of Soviet Socialist Republics
 
United Arab Republic
 
United Kingdom
 
United States of America
 
Upper Volta
 
Uruguay
 
Uzbek Soviet Socialist Republic
 
Vatican City
 
Venezuela
 
North Vietnam
 
South Vietnam
 
Western Samoa
 
Yemen
 
Yugoslavia
 
Zambia

Colonies, concessions, possessions, protectorates, mandates and territories

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Australian Antarctic Territory (Australia)
 
Christmas Island (Australia)
 
Cocos (Keeling) Islands (Australia)
 
Heard Island and McDonald Islands (Australia)
 
Jervis Bay Territory (Australia)
 
Nauru (Australia)
 
Norfolk Island (Australia)
 
Papua New Guinea (Australia)
 
Faroe Islands (Denmark)
 
Ã…land Islands (Finland)
 
Clipperton Island (France)
 
Comoros (France)
 
French Guiana (France)
 
French Polynesia (France)
 
French Somaliland (France)
 
French Southern and Antarctic Lands (France)
 
Gambier Islands (France)
 
Guadeloupe (France)
 
Martinique (France)
 
New Caledonia (France)
 
New Hebrides (France)
 
Réunion (France)
 
Saint Pierre and Miquelon (France)
 
Wallis and Futuna (France)
 
Sikkim (India)
 
Netherlands Antilles (Netherlands)
 
Suriname (Netherlands)
 
Cook Islands (New Zealand)
 
Niue (New Zealand)
 
Ross Dependency (New Zealand)
 
Tokelau Islands (New Zealand)
 
Bouvet Island (Norway)
 
Jan Mayen (Norway)
 
Peter I Island (Norway)
 
Queen Maud Land (Norway)
 
Svalbard (Norway)
 
Portuguese Angola (Portugal)
 
Portuguese Cape Verde (Portugal)
 
Portuguese Guinea (Portugal)
 
Portuguese Macau (Portugal)
 
Portuguese Mozambique (Portugal)
 
Portuguese São Tomé and Príncipe (Portugal)
 
Portuguese Timor (Portugal)
 
South West Africa (South Africa)
 
Canary Islands (Spain)
 
Ceuta (Spain)
 
Ifni (Spain)
 
Spanish Guinea (Spain)
 
Spanish Sahara (Spain)
 
Akrotiri and Dhekelia (United Kingdom)
 
Antigua (United Kingdom)
 
Bahamas (United Kingdom)
 
Bahrain (United Kingdom)
 
Barbados (until 29 November; United Kingdom)
 
Basutoland (until 3 October; United Kingdom)
 
Bechuanaland (until 29 September; United Kingdom)
 
Bermuda (United Kingdom)
 
British Antarctic Territory (United Kingdom)
 
British Guiana (until 25 May; United Kingdom)
 
British Honduras (United Kingdom)
 
British Indian Ocean Territory (United Kingdom)
 
British Virgin Islands (United Kingdom)
 
British Western Pacific Territories (United Kingdom)
 
Brunei (United Kingdom)
 
Canton and Enderbury Islands ​(United Kingdom and United States)
 
Cayman Islands (United Kingdom)
 
Dominica (United Kingdom)
 
Falkland Islands (United Kingdom)
 
Fiji (United Kingdom)
 
Gibraltar (United Kingdom)
 
Grenada (United Kingdom)
 
Guernsey (United Kingdom)
 
Herm (United Kingdom)
 
Hong Kong (United Kingdom)
 
Isle of Man (United Kingdom)
 
Jersey (United Kingdom)
 
Mauritius (United Kingdom)
 
Montserrat (United Kingdom)
 
Pitcairn Islands (United Kingdom)
 
Qatar (United Kingdom)
 
Saint Christopher-Nevis-Anguilla (United Kingdom)
 
Saint Helena (United Kingdom)
 
Saint Lucia (United Kingdom)
 
Saint Vincent (United Kingdom)
 
Sark (United Kingdom)
 
Seychelles (United Kingdom)
 
South Arabia (United Kingdom)
 
Swaziland (United Kingdom)
 
Tonga (United Kingdom)
 
Trucial States (United Kingdom)
 
Turks and Caicos Islands (United Kingdom)
 
American Samoa (United States)
 
Baker Island (United States)
 
Corn Islands (United States)
 
Jarvis Island (United States)
 
Guam (United States)
 
Howland Island (United States)
 
Johnston Atoll (United States)
 
Kingman Reef (United States)
 
Midway Atoll (United States)
 
Navassa Island (United States)
 
Palmyra Atoll (United States)
 
Panama Canal Zone (United States)
 
Petrel Islands (United States)
 
Puerto Rico (United States)
 
Quita Sueno Bank (United States)
 
Roncador Bank (United States)
 
Serrana Bank (United States)
 
Serranilla Bank (United States)
 
Swan Islands (United States)
 
Trust Territory of the Pacific Islands (United States)
 
United States Virgin Islands (United States)
 
Wake Island (United States)

Australian states

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New South Wales
 
Queensland
 
South Australia
 
Tasmania
 
Victoria
 
Western Australia

Canadian states

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Alberta
 
British Columbia
 
Manitoba
 
Newfoundland
 
New Brunswick
 
Northwest Territories
 
Nova Scotia
 
Ontario
 
Prince Edward Island
 
Quebec
 
Saskatchewan
 
Yukon Territory

Sovereign U.S. states

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Alabama
 
Alaska
 
Arizona
 
Arkansas
 
California
 
Colorado
 
Connecticut
 
Delaware
 
Florida
 
Georgia
 
Hawaii
 
Idaho
 
Illinois
 
Indiana
 
Iowa
 
Kansas
 
Kentucky
 
Louisiana
 
Maine
 
Maryland
 
Massachusetts
 
Michigan
 
Minnesota
 
Mississippi
 
Missouri
 
Montana
 
Nebraska
 
Nevada
 
New Hampshire
 
New Jersey
 
New Mexico
 
New York
 
North Carolina
 
North Dakota
 
Ohio
 
Oklahoma
 
Oregon
 
Pennsylvania
 
Rhode Island
 
South Carolina
 
South Dakota
 
Tennessee
 
Texas
 
Utah
 
Vermont
 
Virginia
 
Washington
 
West Virginia
 
Wisconsin
 
Wyoming

Other entities

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Rwenzururu
 
San Juan
 
Sumatra
 
Tibet

International organizations

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African and Malagasy Union
 
Association of Southeast Asia
 
Comecon
 
European Coal and Steel Community
 
European Union
 
Federation of Vexillological Associations
 
Latin American Parliament
 
League of Arab States
 
North Atlantic Treaty Organization
 
Olympic Movement
 
Organization of American States
 
Organization of the Petroleum Exporting Countries
 
Red Crescent
 
Red Cross
 
Red Lion and Sun
 
Red Magen David
 
Scout Movement
 
Southeast Asia Treaty Organization
 
United Nations

Other culturals

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Buddhism
 
Esperanto
 
Pan-African Flag
 
Romani