Compendium of postage stamp issuers (U)

Each "article" in this category is a collection of entries about several stamp issuers, presented in alphabetical order. The entries are formulated on the micro model and so provide summary information about all known issuers.
See the :Category:Compendium of postage stamp issuers page for details of the project.

UAE

;Refer : United Arab Emirates (UAE)

UAR

;Refer : United Arab Republic (UAR)

Ubangi-Shari

;Refer : Oubangui-Chari

Ubangi-Shari-Chad

;Refer : Oubangui-Chari-Tchad

Uganda

;Dates : 1962 –
;Capital : Kampala
;Currency : 100 cents = 1 shilling
;Main Article Postage stamps and postal history of Uganda
;See also : British East Africa;

Uganda Protectorate

;Dates : 1895 – 1902
;Capital : Entebbe
;Currency : 1000 cowries = 2 rupees
;Refer : British East Africa

United Kingdom

;Refer : United Kingdom (UK)

Ukraine

;Dates : 1992 –
;Capital : Kyiv
;Currency : karbovanets
;Main Article Postage stamps and postal history of Ukraine
;Includes : Ukraine (pre–Soviet);
;See also : Union of Soviet Socialist Republics (USSR)

Ukraine (pre-Soviet)

;Dates : 1918 – 1923
;Capital : Kiev
;Currency : 200 shahiv = 100 kopecks = 1 Russian ruble
;Refer : Ukraine

Ukraine (German Occupation)

;Dates : 1941 – 1944
;Currency : 100 pfennige = 1 mark
;Refer : German Occupation Issues (WW2)

Ukrainian Field Post

;Dates : 1920 only
;Currency : 100 shahiv = 1 grivna
;Refer : Ukraine

UKTT

;Refer : Southern Cameroons

Ultramar

;Refer : Cuba;

Umm Al Qiwain

;Dates : 1964 – 1967
;Currency : 100 naye paise = 1 rupee
;Refer : Trucial States

UN

;Refer : United Nations (UN)

UN Administration of West New Guinea

;Refer : West New Guinea

UNESCO

;Dates : 1961 – 1981
;Currency : 100 centimes = 1 franc
;Refer : International Organisations

Union Island

;Refer : Grenadines of St Vincent

Union Islands

;Refer : Tokelau

Union of Soviet Socialist Republics (USSR)

;Dates : 1923 – 1992
;Capital : Moscow
;Currency : 100 kopecks = 1 Soviet ruble
;Main Article Needed :
;Includes : USSR Issues for the Far East
;See also : Armenia;

United Arab Emirates (UAE)

;Dates : 1973 –
;Capital : Abu Dhabi
;Currency : 100 fils = 1 dirham
;Main Article Postage stamps and postal history of the United Arab Emirates
;See also : Abu Dhabi;

United Arab Republic (UAR)

;Dates : 1958 – 1961
;Capital : Cairo
;Currency : 1000 milliemes = 100 piastres = 1 pound
;Refer : Egypt

United Kingdom (UK)

This was historically called the United Kingdom of Great Britain and Ireland after which it became the United Kingdom of Great Britain and Northern Ireland or UK for short.
It has never been a philatelic term, any more than England has, because the worldwide consensus among philatelists and postal authorities has been that the issuer of British stamps is called Great Britain.
;Refer : Great Britain

United Kingdom Trust Territory (UKTT)

;Refer : Southern Cameroons

United Nations (UN)

;Dates : 1951 –
;Currency : American, Austrian or Swiss depending on location
;Refer : International Organisations

United States">Postage stamps and postal history of the United States">United States

;Dates : 1847 –
;Capital : Washington, D.C.
;Currency : 100 cents = 1 dollar
;See also : Confederate States of America

United States of New Granada

;Refer : New Granada

Universal Postal Union (UPU)

;Dates : 1957 –
;Currency : 100 centimes = 1 franc
;Refer : International Organisations

[Postage stamps and postal history of [Upper Senegal and Niger|Upper Senegal & Niger]]

;Dates : 1906 – 1921
;Capital : Niamey
;Currency : 100 centimes = 1 franc
;Refer : French Soudan

Upper Silesia

;Dates : 1920 – 1922
;Currency : 100 pfennige = 1 mark
;Refer : Plebiscite Issues

Upper Volta

;Dates : 1959 – 1984
;Capital : Ouagadougou
;Currency : 100 centimes = 1 franc
;Main Article Needed :
;Includes : Upper Volta (French Colony)
;See also : Burkina Faso;

Upper Volta (French Colony)

;Dates : 1920 – 1933
;Capital : Ouagadougou
;Currency : 100 centimes = 1 franc
;Refer : Upper Volta

Upper Yafa

;Dates : 1967 only
;Currency : 1000 fils = 1 dinar
;Refer : Aden Protectorate States

UPU

;Refer : Universal Postal Union (UPU)

Uruguay

;Dates : 1856 –
;Capital : Montevideo
;Currency : 120 centavos = 1 real
;Main Article Postage stamps and postal history of Uruguay

United States

;Refer : United States of America (USA)

US Post Abroad

;Main Article Needed :
;Includes : Guam;

US Postal Agency in Shanghai

;Refer : Shanghai (US Postal Agency)

US Post Offices in Japan

;Dates : 1867 – 1874
;Currency : 100 cents = 1 dollar
;Refer : US Post Abroad

USSR

;Refer : Union of Soviet Socialist Republics (USSR)
;Main Article Stamps of the Soviet Union

USSR Issues for the Far East

;Dates : 1923 only
;Currency : 100 kopecks = 1 Soviet ruble
;Refer : Union of Soviet Socialist Republics (USSR)
;Main Article Postage stamps and postal history of the Far Eastern Republic

US Virgin Islands

;Refer : Danish West Indies

Uzbekistan

;Dates : 1992 –
;Capital : Tashkent
;Currency : 100 kopecks = 1 Soviet rouble
;Main Article Postage stamps and postal history of Uzbekistan
;See also : Union of Soviet Socialist Republics (USSR)