List of countries in the 1920s

This is a list of countries in the 1920s, giving an overview of states around the world during the period between 1 January 1920 and 31 December 1929. It contains entries, arranged alphabetically, with information on the status and recognition of their sovereignty. It includes Widely-recognized sovereign states, and entities which were de facto sovereign but which were not Widely-recognized by other states.

Sovereign states

Name and capital city	Information on status and recognition of sovereignty
A
Abkhazia – Socialist Soviet Republic of Abkhazia (from March 31, 1921 to December 16, 1921) Capital: Sukhumi	Recognized independent state. It was subordinate to the Georgian SSR from December 16, 1921.
→ → → → Afghanistan Capital: Kabul Emirate of Afghanistan (to June 9, 1926) Kingdom of Afghanistan (from June 9, 1926 to 17 January 1929) Emirate of Afghanistan (from 18 January to 13 October 1929) Kingdom of Afghanistan (from 15 October 1929)	Reign of Amanullah Khan, Inayatullah Khan, and Mohammed Nadir Shah: Widely-recognized independent state Reign of Habibullāh Kalakāni, Ali Ahmad Khan and Abd-al Karim: Not recognized by any state.
→ → → Albania Capital: Tirana Principality of Albania (to January 31, 1925) Albanian Republic (from January 31, 1925 to September 1, 1928) Albanian Kingdom (from September 1, 1928)	Widely-recognized independent state. LON member state from December 17, 1920.
Andorra – Principality of Andorra Capital: Andorra La Vella	Widely-recognized independent state.
Argentina – Argentine Republic Capital: Buenos Aires	Widely-recognized independent state. LON founding member state from January 10, 1920.
→ Armenia (to March 12, 1922) Capital: Yerevan Republic of Armenia (to November 29, 1920) Armenian Socialist Soviet Republic (from November 29, 1920 to March 12, 1922)	Widely-recognized independent state. Became part of the Transcaucasian SFSR from March 12, 1922.
Asir – Idrisid Emirate of Asir (to October 21, 1926) Capital: Sabya	Widely-recognized independent state. Vassal state of Kingdom of Hejaz and Nejd from October 21, 1926.
Asir, Upper – Sheikdom of Upper Asir (to August 30, 1920) Capital: Abha	Widely-recognized independent state. Partitioned between Sultanate of Nejd and Idrisid Emirate of Asir from August 30, 1920.
Australia – Commonwealth of Australia Capital: Canberra	Widely-recognized independent state after November 15, 1926. LON founding member state from January 10, 1920. Australia had two external territories: Norfolk Island Papua Australia administered two League of Nations mandates: Nauru (Administered by Australia, New Zealand and the United Kingdom from December 17, 1920) New Guinea (Administered from December 17, 1920)
Austria – Republic of Austria Capital: Vienna	Widely-recognized independent state. LON member state from December 15, 1920.
→ → Azerbaijan (to March 12, 1922) Capital: Baku Azerbaijan Democratic Republic (to April 28, 1920) Azerbaijan Socialist Soviet Republic (from April 28, 1920 to March 12, 1922)	Widely-recognized independent state. Became part of the Transcaucasian SFSR from March 12, 1922. Nakhichevan ASSR (Protectorate from March 16, 1921)
B
Belgium – Kingdom of Belgium Capital: Brussels	Widely-recognized independent state. LON founding member state from January 10, 1920. Belgium had sovereignty over one colony and one concession: Belgian Congo (Colony) Tientsin (Concession) Belgium administered one League of Nations mandate: Ruanda-Urundi (LON mandate from July 20, 1922. Administrative union with the Belgian Congo from March 1, 1926)
Bolivia Capital: Sucre Republic of Bolivia (to 12 July 1920) Republic of Bolivia (from 12 July 1920)	Widely-recognized independent state. LON founding member state from January 10, 1920.
Brazil – Republic of the United States of Brazil Capital: Rio de Janeiro	Widely-recognized independent state. LON founding member state from January 10, 1920; withdrew in June 14, 1926. Brazil was a federation of 20 states, one territory, and one federal district.
Bulgaria – Kingdom of Bulgaria Capital: Sofia	Widely-recognized independent state. LON member state from December 16, 1920.
C
Canada – Dominion of Canada Capital: Ottawa	Widely-recognized independent state after November 15, 1926. LON founding member state from January 10, 1920.
Chile – Republic of Chile Capital: Santiago Parliamentary Era (to 18 September 1925) Republic of Chile (from 18 September 1925)	Widely-recognized independent state. LON founding member state from January 10, 1920.
→ China – Republic of China Capital: Nanking, Peking, Chungking	Widely-recognized independent state. LON founding member state from January 10, 1920.
Colombia – Republic of Colombia Capital: Bogotá	Widely-recognized independent state. LON founding member state from January 10, 1920.
Costa Rica – Republic of Costa Rica Capital: San José	Widely-recognized independent state. LON member state from December 16, 1920; withdrew in January 22, 1925.
Cuba – Republic of Cuba Capital: Havana	Widely-recognized independent state. LON founding member state from January 10, 1920.
→ Czechoslovakia Capital: Prague Czecho-Slovak Republic (to 1920) Czechoslovak Republic (from 1920)	Widely-recognized independent state. LON founding member state from January 10, 1920.
D
Template:Country data Danzig – Free City of Danzig (from November 15, 1920) Capital: Danzig	Widely-recognized independent. Under League of Nations protection.
Denmark – Kingdom of Denmark Capital: Copenhagen	Widely-recognized independent state. LON founding member state from January 10, 1920.
Dominican Republic Capital: Santo Domingo	Widely-recognized independent state. LON member state from September 28, 1924.
E
Ecuador Capital: Quito Republic of Ecuador (to 9 July 1925) Republic of Ecuador (from 9 July 1925)	Widely-recognized independent state.
Template:Country data Kingdom of Egypt – Kingdom of Egypt (from February 28, 1922) Capital: Cairo	Widely-recognized independent state.
El Salvador – Republic of El Salvador Capital: San Salvador	Widely-recognized independent state. LON founding member state from January 10, 1920.
Estonia – Republic of Estonia Capital: Tallinn	Widely-recognized independent state. LON member state from September 22, 1921.
Ethiopia – Ethiopian Empire Capital: Addis Ababa	Widely-recognized independent state. LON member state from September 28, 1923.
F
Finland – Republic of Finland Capital: Helsinki	Widely-recognized independent state. LON member state from December 16, 1920.
Template:Country data Fiume – Free State of Fiume (from November 12, 1920 to February 22, 1924) Capital: Fiume	Widely-recognized independent. Annexed by Italy from February 22, 1924.
France – French Republic Capital: Paris	Widely-recognized independent state. LON founding member state from January 10, 1920. France administered the foreign affairs of the following protectorates: French Morocco (Protectorate) France administered the following League of Nations mandates: Alawite (LON mandate from September 2, 1920. Administered by France from September 29, 1923.) Greater Lebanon (LON mandate from September 1, 1920. Administered by France from September 29, 1923) Syrian Federation (LON mandate from June 28, 1922 to January 1, 1925. Administered by France from September 29, 1923) State of Syria (LON mandate from January 1, 1925) → Souaida (LON mandate from July 25, 1920. Administered by France from September 29, 1923) French Cameroons (LON mandate from July 20, 1922) French Togoland (LON mandate from July 20, 1922) Saar Basin (Administered by the United Kingdom and France from January 10, 1920)
G
→ → Georgia (to March 12, 1922) Capital: Tiflis Democratic Republic of Georgia (to February 11, 1921) Georgian Soviet Socialist Republic (from February 11, 1921 to March 12, 1922)	Widely-recognized independent state. Georgian SSR had one autonomous republic (from July 16, 1921): Adjarian ASSR. Became part of the Transcaucasian SFSR from March 12, 1922. SSR Abkhazia (Associated state from December 16, 1921)
Template:Flags Germany – German Realm Capital: Berlin	Widely-recognized independent state. LON member state from September 8, 1926.
→ Template:Country data Second Hellenic Republic Greece Capital: Athens Kingdom of Greece (to March 25, 1924) Hellenic Republic (from March 25, 1924)	Widely-recognized independent state. LON founding member state from January 10, 1920.
Guatemala – Republic of Guatemala Capital: Guatemala City	Widely-recognized independent state. LON founding member state from January 10, 1920.
H
→ Ha'il / Jabal Shammar – Emirate of Ha'il (to November 2, 1921) Capital: Ha'il	Widely-recognized independent state. It was completely conquered by Saudi forces from November 2, 1921 and subsequently incorporated into the Sultanate of Nejd.
Haiti – Republic of Haiti Capital: Port-au-Prince	Widely-recognized independent state. LON founding member state from January 10, 1920.
Template:Country data Kingdom of Hejaz → Template:Country data Kingdom of Hejaz – Hashemite Kingdom of Hejaz (to January 8, 1926) Capital: Mecca	Widely-recognized independent state. Annexed by Sultanate of Nejd, creating the Kingdom of Hejaz and Nejd from January 8, 1926.
Honduras – Republic of Honduras Capital: Tegucigalpa	Widely-recognized independent state. LON founding member state from January 10, 1920.
Hungary – Kingdom of Hungary (from March 1, 1920) Capital: Budapest	Widely-recognized independent state. LON member state from September 18, 1922.
I
Iceland – Kingdom of Iceland Capital: Reykjavik	Widely-recognized independent state.
Ireland – Irish Free State (from December 6, 1922) Capital: Dublin	Widely-recognized independent state after November 15, 1926. LON member state from September 10, 1923.
Italy – Kingdom of Italy Capital: Rome	Widely-recognized independent state. LON founding member state from January 10, 1920. Italy had four colonies and one concession: Italian Cyrenaica (Colony) Italian Eritrea (Colony) Italian Somaliland (Colony) Italian Tripolitania (Colony) Tientsin (Concession)
J
Japan – Empire of Japan Capital: Tokyo	Widely-recognized independent state. LON founding member state from January 10, 1920. Japan administered one League of Nations mandate: South Seas Mandate
L
& Template:Country data Latvian Socialist Soviet Republic Latvia (disputed between two governments to January 13, 1920) Capital: Riga Republic of Latvia Template:Country data Latvian Socialist Soviet Republic (to January 13, 1920)	Widely-recognized independent state. LON member state from September 22, 1921.
Liberia – Republic of Liberia Capital: Monrovia	Widely-recognized independent state. LON founding member state from January 10, 1920.
→ Liechtenstein – Principality of Liechtenstein Capital: Vaduz	Widely-recognized independent state.
Lithuania – Republic of Lithuania Capital: Vilnius	Widely-recognized independent state. LON member state from September 22, 1921.
Luxembourg – Grand Duchy of Luxembourg Capital: Luxembourg City	Widely-recognized independent state. LON member state from December 16, 1920.
M
Mexico – United Mexican States Capital: Mexico City	Widely-recognized independent state.
Monaco – Principality of Monaco Capital: Monaco City	Widely-recognized independent state.
Mongolia (from July 11, 1921) Capital: Ulaanbaatar Mongolian People's Government (to November 26, 1924) Mongolian People's Republic (from November 26, 1924)	Widely-recognized independent state.
Mountain Republic - Mountainous Republic of the Northern Caucasus (to January 20, 1921) Capital: Temir-Khan-Shura	Widely-recognized independent state. Incorporated into the Russian SFSR as the Mountain ASSR from January 20, 1921.
N
→ Nejd (to January 8, 1926) Capital: Riyadh Emirate of Nejd and Hasa (to August 22, 1921) Sultanate of Nejd (from August 22, 1921 to January 8, 1926)	Widely-recognized independent state. Nejd annexed Hejaz, creating the Kingdom of Hejaz and Nejd from January 8, 1926.
Nejd and Hejaz – Kingdom of Nejd and Hejaz (Personal Union, from January 8, 1926) Capital: Mecca (Hejaz), Riyadh (Nejd) Nejd (from January 8, 1926) Sultanate of Nejd (to January 29, 1927) Kingdom of Nejd and its Dependencies (from January 29, 1927) Hejaz – Kingdom of Hejaz (from January 8, 1926)	Widely-recognized independent state. Nejd and Hejaz had one protectorate: Asir (from October 21, 1926)
Nepal – Kingdom of Nepal Capital: Kathmandu	Widely-recognized independent state.
Netherlands – Kingdom of the Netherlands Capital: Amsterdam	Widely-recognized independent state. LON founding member state from January 10, 1920.
Newfoundland – Dominion of Newfoundland Capital: St. John's	Widely-recognized independent state after November 15, 1926.
New Zealand – Dominion of New Zealand Capital: Wellington	Widely-recognized independent state after November 15, 1926. LON founding member state from January 10, 1920. The following are territories of New Zealand: Cook Islands (Dependent territory) Niue Island (Dependent territory) Ross Dependency (Uninhabited dependent territory from November 14, 1923) Union Islands (Dependent territory from February 11, 1926) New Zealand administered one League of Nations mandate: Western Samoa (LON mandate from December 17, 1920)
Nicaragua – Republic of Nicaragua Capital: Managua	Widely-recognized independent state. LON founding member state from January 10, 1920.
Norway – Kingdom of Norway Capital: Oslo	Widely-recognized independent state. LON founding member state from January 10, 1920.
O
Ottoman Empire – Sublime Ottoman State (to November 1, 1922) Capital: Constantinople	Widely-recognized independent state. Ottoman Empire had one protectorate: North Caucasian Emirate (to March 1920)
P
Panama – Republic of Panama Capital: Panama City	Widely-recognized independent state.
Paraguay – Republic of Paraguay Capital: Asunción	Widely-recognized independent state. LON founding member state from January 10, 1920.
→ Persia Capital: Tehran Persian Empire (to October 31, 1925) Imperial State of Persia (from October 31, 1925)	Widely-recognized independent state. LON founding member state from January 10, 1920.
Peru – Peruvian Republic Capital: Lima	Widely-recognized independent state. LON founding member state from January 10, 1920.
→ Poland – Republic of Poland Capital: Warsaw	Widely-recognized independent state. LON founding member state from January 10, 1920.
Portugal Capital: Lisbon First Portuguese Republic (to 29 May 1926) Ditadura Nacional (from 29 May 1926)	Widely-recognized independent state. LON founding member state from January 10, 1920.
R
Romania – Kingdom of Romania Capital: Bucharest	Widely-recognized independent state. LON founding member state from January 10, 1920.
Russia – Russian Socialist Federative Soviet Republic (to December 30, 1922) Capital: Moscow	Widely-recognized independent state. Became part of the Soviet Union from December 30, 1922. Russia had two protectorates and one concession: Bukhara (Protectorate to October 8,1920) Khiva (Protectorate to February 2, 1920) Tientsin (De facto concession to September 15, 1920)
S
San Marino – Most Serene Republic of San Marino Capital: City of San Marino	Widely-recognized independent state.
Serbs, Croats and Slovenes / Yugoslavia Capital: Belgrade Kingdom of Serbs, Croats, and Slovenes (to January 6, 1929) Kingdom of Yugoslavia (from January 6, 1929)	Widely-recognized independent state. LON founding member state from January 10, 1920.
Siam – Kingdom of Siam Capital: Bangkok	Widely-recognized independent state. LON founding member state from January 10, 1920.
→ South Africa – Union of South Africa Capital: Cape Town, Pretoria, Bloemfontein, and Pietermaritzburg	Widely-recognized independent state after November 15, 1926. LON founding member state from January 10, 1920. South Africa administered one League of Nations mandate: → South West Africa (LON mandate from October 1, 1922)
→ → Soviet Union – Union of Soviet Socialist Republics (from December 30, 1922) Capital: Moscow	Widely-recognized independent state. The Soviet Union was a federation of four (later seven) republics.
Spain – Kingdom of Spain Capital: Madrid	Widely-recognized independent state. LON founding member state from January 10, 1920. Spain had sovereignty over two colonies and one protectorate: Template:Country data Spanish Guinea (Colony) Template:Country data Spanish Sahara (Colony) Spanish Morocco (Protectorate)
Sweden – Kingdom of Sweden Capital: Stockholm	Widely-recognized independent state. LON founding member state from January 10, 1920.
Switzerland – Swiss Confederation Capital: Bern	Widely-recognized independent state. LON founding member state from January 10, 1920.
T
Tibet Capital: Lhasa	De facto independent state. Claimed by the Republic of China.
Template:Country data Transcaucasian SFSR – Transcaucasian Socialist Federative Soviet Republic (from March 12 to December 30, 1922) Capital: Tiflis	Widely-recognized independent state. The Transcaucasian SFSR was a federation constituted by the Armenian SSR, the Azerbaijan SSR and the Georgian SSR. Became part of the Soviet Union from December 30, 1922.
Turkey (from November 1, 1922) Capital: Ankara Turkey (from July 24, 1923 to October 29, 1923) Republic of Turkey (from October 29, 1923)	Widely-recognized independent state.
U
United Kingdom Capital: London United Kingdom of Great Britain and Ireland (to April 12, 1927) United Kingdom of Great Britain and Northern Ireland (from April 12, 1927)	Widely-recognized independent state. LON founding member state from January 10, 1920. The following were colonies, and territories of the United Kingdom: Aden - Aden Protectorate (Protectorate) Amoy (Concession) Bahama Islands (Crown colony) Bahrain – State of Bahrain (Protectorate) Baker Island (Uninhabited possession) Barbados (Crown colony) Basutoland – Territory of Basutoland (Crown colony) Bechuanaland – Bechuanaland Protectorate (Protectorate) Bermuda (Crown colony) Bhutan – Kingdom of Bhutan (Independent state under Treaty of Punakha) Template:Country data British East Africa (Protectorate to July 23, 1920) British Guiana (Crown colony) British Honduras (Crown colony) British Leeward Islands – Federal Colony of the Leeward Islands (Crown colony) Template:Country data British Somaliland – British Somaliland Protectorate (Protectorate) British Western Pacific Territories (Crown colony) British Windward Islands – Federal Colony of the Windward Islands (Crown colony) Brunei – State of Brunei (Protectorate) Template:Country data British Ceylon (Crown colony) Cyprus (Crown colony) Falkland Islands (Crown colony) Federated Malay States (Protectorate) Fiji (Crown colony) Gambia – Gambia Colony and Protectorate (Crown colony and protectorate) Gibraltar (Crown colony) Gold Coast (Crown colony) Guernsey – Bailiwick of Guernsey (Crown dependency) Heard Island and McDonald Islands (Uninhabited possession) Hong Kong (Crown colony) British India (Crown colony. LON founding member state from January 10, 1920.) Isle of Man (Crown dependency) Jamaica (Crown colony) Kenya (Crown colony from June 11, 1920 and protectorate from August 13, 1920) Jarvis Island (Uninhabited possession) Jersey – Bailiwick of Jersey (Crown dependency) Jiujiang (Concession until 1929) Kuwait – Sheikhdom of Kuwait (Protectorate) Maldive Islands – Sultanate of the Maldive Islands (Protectorate) Malta (Crown colony) Mauritius (Crown colony) Muscat and Oman – Sultanate of Muscat and Oman (State under the informal protection) Nigeria – Colony and Protectorate of Nigeria (Crown colony and protectorate) North Borneo (Protectorate) Northern Rhodesia – Protectorate of Northern Rhodesia (Protectorate) Nyasaland – Nyasaland Protectorate (Protectorate) Qatar – State of Qatar (Protectorate) Saint Helena (Crown colony) Sarawak – Kingdom of Sarawak (Protectorate) Seychelles (Crown colony) Sierra Leone – Sierra Leone Colony and Protectorate (Crown colony and protectorate) Southern Rhodesia – Colony of Southern Rhodesia (Crown colony) Straits Settlements (Crown colony) Swaziland – Swaziland Protectorate (Protectorate) Transjordan (Protectorate from April 11, 1921 to September 29, 1923) Trinidad and Tobago (Crown colony) Tristan da Cunha (Crown colony) Trucial States (Protectorate) Uganda (Protectorate) Unfederated Malay States Johor – State of Johor Darul Ta'zim (Protectorate) Kedah – State of Kedah Darul Aman (Protectorate) Kelantan – State of Kelantan Darul Naim (Protectorate) Perlis – State of Perlis Indera Kayangan (Protectorate) Terengganu – State of Terengganu Darul Iman (Protectorate) Victoria Land (Uninhabited possession) Weihaiwei (Concession) Zanzibar (Protectorate) Zhenjiang (Concession until 1929) United Kingdom administered the following League of Nations mandates: British Cameroons (LON mandate from July 20, 1922) British Togoland (LON mandate from July 20, 1922) → Iraq (LON mandate from August 23, 1921) Palestine (LON mandate from April 25, 1920. Administered by the United Kingdom from September 29, 1923) → Transjordan (Administered under the Mandate for Palestine by the United Kingdom from September 29, 1923) Saar Basin (Administered by the United Kingdom and France from January 10, 1920) Tanganyika (LON mandate from July 20, 1922)
United States – United States of America Capital: Washington, D.C.	Widely-recognized independent state. The following were territories of the United States of America: Alaska (Territory) American Samoa (Territory) Corn Islands (Territory) Guam (Territory) Hawaii (Territory) Howland Island (Uninhabited territory) Johnston Atoll (Uninhabited territory) Kingman Reef (Uninhabited territory) Midway Atoll (Uninhabited territory) Navassa Island (Uninhabited territory) Template:Country data Panama Canal Zone (Territory) Petrel Islands (Uninhabited territory) Philippine Islands (Territory) Puerto Rico (Territory) Quita Sueno Bank (Uninhabited territory) Roncador Bank (Uninhabited territory) Serrana Bank (Uninhabited territory) Serranilla Bank (Uninhabited territory) Swan Islands (Uninhabited territory) United States Virgin Islands (Territory)
Uruguay – Eastern Republic of Uruguay Capital: Montevideo	Widely-recognized independent state. LON founding member state from January 10, 1920.
V
Vatican City – Vatican City State (from February 1, 1929; effective from June 7, 1929) Capital: Vatican City	Widely recognized independent state. Vatican City is administered by the Holy See.
Venezuela – United States of Venezuela Capital: Caracas	Widely-recognized independent state. LON founding member state from January 10, 1920.
Y
Yemen – Mutawakkilite Kingdom of Yemen Capital: Sana`a	Widely-recognized independent state.

Other states

• Alash – Alash Autonomy (to August 26, 1920)
• Ararat – Republic of Ararat (from October 28, 1927)
• Armenia, Mountainous (from April 26 to July 1921)
• Azadistan
• Baranya-Baja – Serb-Hungarian Baranya-Baja Republic (from August 14 to August 25, 1921)
• Template:Flags Bottleneck – Free State Bottleneck (to February 23, 1923)
• Bukharan (from October 8, 1920 to October 27, 1924)
  • Bukharan People's Soviet Republic (from October 8, 1920 to September 19, 1924)
  • Bukharan Socialist Soviet Republic (from September 19 to October 27, 1924)
• Byelorussia – Byelorussian Socialist Soviet Republic (from August 1, 1920 to December 30, 1922)
  Capital: Minsk
• Carnaro – Italian Regency of Carnaro (from September 8 to December 30, 1920)
• Central Lithuania – Republic of Central Lithuania (from October 12, 1920)
• Don – Don Republic (to 1920)
• Far Eastern Republic (from April 6, 1920 to November 15, 1922)
• Galicia – Galician Socialist Soviet Republic (from July 8 to September 21, 1920)
• Gilan – Persian Socialist Soviet Republic (from June 1920)
• Ireland – Irish Republic (to December 6, 1922)
  Capital: Dublin
• Karelia
  • Karelian United Government (from December 20, 1920 to April 21, 1921)
  • Republic of Eastern Karelia (from April 21, 1921 to July 23, 1923)
• Khorasan – Autonomous Government of Khorasan (from April 2, 1921 to October 6, 1921)
• Khorezm (from April 26, 1920 to October 27, 1924)
  • Khorezm People's Soviet Republic (from April 26, 1920 to October 20, 1923)
  • Khorezm Socialist Soviet Republic (from October 20, 1923 to October 27, 1924)
• Template:Country data Kuban – Kuban People's Republic (to March 17, 1920)
• Kurdistan – Kingdom of Kurdistan (from February 1925 to April 14, 1925)
• Labin – Labin Republic (from March 2 to April 8, 1921)
• Lajtabánság – Banate of Leitha (from October 4 to November 5, 1921)
• Lemko-Rusyn – Lemko-Rusyn Republic (to March 1920)
• Mirdita – Republic of Mirdita (from July 17 to November 20, 1921)
• Mongolia (from February 21 to July 11, 1921)
• North Ingria – Republic of North Ingria (to December 20, 1920)
• Rhineland – Rhenish Republic (from October 21, 1923)
• Rif – Confederal Republic of the Tribes of the Rif (from September 18, 1921 to May 27)
• Siberia, Autonomous – Provisional Government of Autonomous Siberia (to February 7, 1920)
• Southern Karelia – Olonets Government of Southern Karelia (from May to December 20, 1920)
• Syria – Arab Kingdom of Syria (to July 25, 1920)
  Capital: Damascus
• Tannu Tuva (from August 14, 1921)
  • People's Republic of Tannu Tuva (to November 24, 1926)
  • Tuvan People's Republic (from November 24, 1926)
• Uhtua – Republic of Uhtua (to December 19, 1920)
• Ukraine, Soviet – Ukrainian Socialist Soviet Republic (to December 30, 1922)
  Capital: Kharkov