Sovereign-state flags in 1903

Sovereign states

Aceh Sultanate (until date unknown)

Acre (until 11 November)

Andorra - variant

Andorra - variant

Angoche

Argentina

Aussa

Australia (until 11 February)

Australia (from 11 February)

Austria-Hungary

Bali

Belgium

Bhutan

Bolivia

Brakna

Brazil

Bulgaria

Busoga

Canada

Chile

China

Chokwe

Colombia

Congo

Costa Rica

Cuba

Darfur

Denmark

Dhala

Dominican Republic

Ecuador

El Salvador

Ethiopian Empire

France

Geledi

Germany

Greece

Guatemala

Haʾil

Haiti

Honduras

Italy

Japan

Johor Sultanate

Kano (until 1903)

Kasanje

Korea

Liberia

Liechtenstein

Luxembourg

Mbunda

Mexico

Monaco

Montenegro

Morocco

Muscat and Oman

Mutayr

Netherlands

Nicaragua

Norway

Nri

Ottoman Empire

Panama (from 3 November to 20 December)

Panama (from 20 December)

Paraguay

Paraguay

Persia

Peru

Portugal

Riyadh

Romania

Russia

San Marino

Serbia

Setul Mambang Segara

Siam

Sokoto

Spain

Sulu

Sweden

Switzerland

Tagant

United Kingdom

United States

Upper Aulaqi Sheikhdom

Upper Aulaqi Sultanate

Upper Yafa (until 1903)

Uruguay

Venezuela

Wadai

Wajoq

Colonies, concessions, possessions, protectorates, mandates and territories

Papua (until 11 February; Australia)

Papua (from 11 February; Australia)

Tientsin (Austria-Hungary)

Tientsin (Belgium)

Danish West Indies (Denmark)

Faroe Islands (Denmark)

Greenland (Denmark)

Iceland (Denmark)

Anglo-Egyptian Sudan (Egypt and United Kingdom)

French Algeria (France)

French Chad (France)

French Comoros (France)

French Congo (France)

French Guiana (France)

French India (France)

French Indochina (France)

French Ivory Coast (France)

French Madagascar (France)

French Polynesia (France)

French Somaliland (France)

French Tunisia (France)

French West Africa (France)

Gambier Islands (France)

Guadeloupe (France)

Hankou (France)

Martinique (France)

New Caledonia (France)

Réunion (France)

Saint Pierre and Miquelon (France)

Shanghai (France)

Tientsin (France)

Ubangi-Shari (from 29 December; France)

Wallis and Futuna (France)

German East Africa (Germany)

German Kiautschou (Germany)

German New Guinea (Germany)

German Samoa (Germany)

German South West Africa (Germany)

Hankou (Germany)

Kamerun (Germany)

Tientsin (Germany)

Togoland (Germany)

Amoy (Italy)

Italian Eritrea (Italy)

Italian Somaliland (Italy)

Shanghai (Italy)

Tientsin (Italy)

Chongqing (Japan)

Hangzhou (Japan)

Hankou (Japan)

Shashi (Japan)

Suzhou (Japan)

Taiwan (Japan)

Tientsin (Japan)

Isla de la Pasión (Mexico)

Curaçao and Dependencies (Netherlands)

Dutch East Indies (Netherlands)

Surinam (Netherlands)

Sverdrup Islands (Norway)

Crete (Ottoman Empire)

Egypt (Ottoman Empire)

Mecca (Ottoman Empire)

Qatar (Ottoman Empire)

Samos (Ottoman Empire)

Portuguese Cape Verde (Portugal)

Kongo (Portugal)

Portuguese East Africa (Portugal)

Portuguese Guinea (Portugal)

Portuguese India (Portugal)

Portuguese Macau (Portugal)

Portuguese São Tomé and Príncipe (Portugal)

Portuguese Timor (Portugal)

Portuguese West Africa (Portugal)

Fort of São João Baptista de Ajudá (Portugal)

Bukhara (Russia)

Khiva (Russia)

Tientsin (Russia)

Finland (Russia)

Champasak (Siam)

Elobey, Annobón, and Corisco (Spain)

Fernando Po (Spain)

Río Muni (Spain)

Spanish North Africa (Spain)

Spanish Sahara (Spain)

Aden (United Kingdom)

Afghanistan (United Kingdom)

Amoy (United Kingdom)

Ascension Island (United Kingdom)

Ashanti (United Kingdom)

Bahamas (United Kingdom)

Bahrain (United Kingdom)

Baker Island (United Kingdom)

Barbados (United Kingdom)

Barotziland–North-Western Rhodesia (United Kingdom)

Basutoland (United Kingdom)

Bechuanaland (United Kingdom)

Bermuda (United Kingdom)

British Central Africa (United Kingdom)

British Ceylon (United Kingdom)

British Cyprus (United Kingdom)

British East Africa (United Kingdom)

British Guiana (United Kingdom)

British Honduras (United Kingdom)

British Hong Kong (United Kingdom)

British Jamaica (United Kingdom)

British Leeward Islands (United Kingdom)

British Mauritius (United Kingdom)

British Somaliland (until 1903; United Kingdom)

British Somaliland (from 1903; United Kingdom)

British Trinidad and Tobago (United Kingdom)

British Western Pacific Territories (United Kingdom)

British Windward Islands (until 1903; United Kingdom)

British Windward Islands (from 1903; United Kingdom)

Brunei (United Kingdom)

Cape Colony (United Kingdom)

Colony of Natal (United Kingdom)

Cook Islands (United Kingdom)

Falkland Islands Dependencies (United Kingdom)

Federated Malay States (United Kingdom)

Fiji (until 1903; United Kingdom)

Fiji (from 1903; United Kingdom)

Gambia (United Kingdom)

Gibraltar (United Kingdom)

Gold Coast (United Kingdom)

Graham Land (United Kingdom)

Guernsey (United Kingdom)

Hankou (United Kingdom)

Heard Island and McDonald Islands (United Kingdom)

India (United Kingdom)

Isle of Man (United Kingdom)

Jarvis Island (United Kingdom)

Jersey (United Kingdom)

Jiujiang (United Kingdom)

Kedah (United Kingdom)

Kelantan (United Kingdom)

Kuwait (United Kingdom)

Lagos (United Kingdom)

Maldives (until mid-1903; United Kingdom)

Maldives (from mid-1903; United Kingdom)

Malta (United Kingdom)

Muscat and Oman (United Kingdom)

Nepal (United Kingdom)

Newfoundland (United Kingdom)

New Guinea (United Kingdom)

New Zealand (United Kingdom)

Niue (until 24 March; United Kingdom)

Niue (from 24 March; United Kingdom)

North Borneo (United Kingdom)

Northern Nigeria Protectorate (United Kingdom)

North-Eastern Rhodesia (United Kingdom)

Orange River Colony (United Kingdom)

Perlis (United Kingdom)

Rhodesia (United Kingdom)

Saint Helena (United Kingdom)

Sarawak (United Kingdom)

Seychelles (from 1903; United Kingdom)

Sierra Leone (United Kingdom)

Sikkim (United Kingdom)

Southern Nigeria (United Kingdom)

Straits Settlements (United Kingdom)

Suez Canal (United Kingdom)

Swaziland (from 31 March; United Kingdom)

Terengganu (United Kingdom)

Transvaal (United Kingdom)

Tientsin (United Kingdom)

Tristan da Cunha (United Kingdom)

Trucial States (United Kingdom)

Uganda (United Kingdom)

Union Islands (United Kingdom)

Victoria Land (United Kingdom)

Weihai (United Kingdom)

Zanzibar (United Kingdom)

Zhenjiang (United Kingdom)

Alaska (United States)

American Samoa (United States)

Arizona (United States)

Bajo Nuevo Bank (United States)

Guam (United States)

Hawaii (United States)

Howland Island (United States)

Indian Territory (United States)

Johnston Atoll (United States)

Kingman Reef (United States)

Middlebrook Island (United States)

Midway Atoll (United States)

Navassa Island (United States)

New Mexico (United States)

Oklahoma (United States)

Palmyra Atoll (United States)

Panama Canal Zone (from 18 November; United States)

Philippine Islands (United States)

Puerto Rico (United States)

Quita Sueño Bank (United States)

Roncador Bank (United States)

Serrana Bank (United States)

Serranilla Bank (United States)

Swan Islands (United States)

Wake Island (United States)

Australian states

New South Wales

Queensland

South Australia

Tasmania

Victoria

Western Australia

Canadian states

British Columbia

Manitoba

New Brunswick

Northwest Territories

Nova Scotia

Ontario

Prince Edward Island

Quebec

Yukon Territory

Constituent U.S. states

Alabama

Arkansas

California

Colorado

Connecticut

Delaware

Florida

Georgia

Idaho

Illinois

Indiana (until 1903)

Indiana

Iowa

Kansas

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Michigan

Minnesota

Mississippi

Missouri

Montana

Nebraska

Nevada

New Hampshire

New Jersey

New York

North Carolina

North Dakota

Ohio

Oregon

Pennsylvania

Rhode Island

South Carolina

South Dakota

Tennessee

Texas

Utah (until 1 March)

Utah (from 1 March)

Virginia

Washington

West Virginia

Vermont

Wisconsin

Wyoming

Other entities

Gurian Republic

Dervish State

Khiva

Kruševo (from 1903)

Shuntian Kingdom (from 1903)

Strandzha Commune (from 1903)

Tagalog Republic

Other culturals

Buddhism