A
Afghanistan
Albania - 1 March 1922
Algeria - 1 October 1907
Angola - 1 March 1977
Antigua and Barbuda - 20 January 1994
Argentina - 1 April 1878
Armenia - 14 October 1992
- Aruba, Curaçao and Sint Maarten - 1 July 1875[1]
Aruba
Curaçao
Sint Maarten
Australia - 1 October 1907
-
Norfolk Island
Austria - 1 July 1875
Azerbaijan - 1 April 1993
B
Bahamas - 24 April 1974
Bahrain - 21 December 1973
Bangladesh - 7 February 1973
Barbados - 11 November 1967
Belarus - 13 May 1947
Belgium - 1 July 1875
Belize - 1 October 1982
Benin - 27 April 1961
Bhutan - 7 March 1969
Bolivia - 1 April 1886
Bosnia and Herzegovina - 1 July 1892; 26 January 1993
Botswana - 12 January 1968
Brunei - 15 January 1985
Brazil - 1 July 1877
Bulgaria - 1 July 1879
Burkina Faso - 29 March 1963
Burundi - 6 April 1963
C
Cambodia - 21 December 1951
Cameroon - 26 July 1960
Canada - 1 July 1878
Cape Verde - 30 September 1976
Central African Republic - 28 June 1961
Chad - 23 June 1961
Chile - 1 April 1881- China - 1 March 1914
Republic of China (Taiwan) 
People's Republic of China
Colombia - 1 July 1881
Comoros - 29 July 1976
Congo, Democratic Republic of the - 1 January 1886
Congo, Republic of - 5 July 1961
Costa Rica - 1 January 1883
Côte d'Ivoire (Ivory Coast) - 23 May 1961
Croatia - 20 July 1992
Cuba - 4 October 1902
Cyprus - 23 November 1961
Czech Republic - 18 May 1920; 18 March 1993
D
Denmark - 1 July 1875
-
Faroe Islands
Greenland
Djibouti - 6 June 1978
Dominica - 31 January 1980
Dominican Republic - 1 October 1880
E
Ecuador - 1 July 1880
Egypt - 1 July 1875
El Salvador - 1 April 1879
Equatorial Guinea - 24 July 1970
Eritrea - 19 August 1993
Estonia - 7 July 1922; 30 April 1992
Ethiopia - 1 November 1908
F
Fiji - 18 June 1971
Finland - 12 February 1918 
Åland
France - 1 January 1876
- French Overseas Departments
- French Guiana
- Guadeloupe (including Saint Barthélemy and Saint Martin)
Martinique- Réunion
- Mayotte
Saint Pierre and Miquelon
- Territories coming within the UPU's jurisdiction by virtue of article 23 of the UPU Constitution
French Polynesia (including Clipperton Island)
French Southern and Antarctic Lands
New Caledonia
Wallis and Futuna
G
Gabon - 17 July 1961
Gambia - 9 October 1974
Georgia - 1 April 1993
Germany - 1 July 1875
Ghana - 10 October 1957
Greece - 1 July 1875
Grenada - 30 January 1978
Guatemala - 1 August 1881
Guinea - 6 May 1959
Guinea-Bissau - 30 May 1974
Guyana - 22 March 1967
H
I
Iceland - 15 November 1919
India - 1 July 1876
Indonesia - 1 May 1877
Iran - 1 September 1877
Iraq - 22 April 1929
Ireland - 6 September 1923
Israel - 24 December 1949
Italy - 1 March 1957
J
Jamaica - 29 August 1963
Japan - 1 June 1877
Jordan - 16 May 1947
K
Kazakhstan - 27 August 1992
Kenya - 27 October 1964
Kiribati - 14 August 1984- Korean Empire - 1 January 1900
Korea, Democratic People's Republic of - 6 June 1974
Korea, Republic of - 15 August 1948
Kuwait - 16 February 1960
Kyrgyzstan - 26 January 1993
L
Laos - 20 May 1952
Latvia - 1 October 1921; 17 June 1992
Lebanon - 12 May 1931; 15 May 1946
Lesotho - 6 September 1967
Liberia - 1 April 1879
Libya - 4 June 1952
Liechtenstein - 13 April 1962
Lithuania - 1 January 1922; 10 January 1992
Luxembourg - 1 July 1875
M
Macedonia - 12 July 1993
Madagascar - 2 November 1961
Malawi - 25 October 1966
Malaysia - 17 January 1958
Maldives - 15 August 1967
Mali - 21 April 1961
Malta - 21 May 1965
Mauritania - 22 March 1967
Mauritius - 29 August 1969
Mexico - 1 April 1879
Moldova - 16 November 1992
Monaco - 12 October 1955
Mongolia - 24 August 1963
Montenegro - 26 July 2006
Morocco - 1 October 1920
Mozambique - 11 October 1978
Myanmar - 4 October 1949
N
Namibia - 30 April 1992
Nauru - 17 April 1969
Nepal - 11 October 1956
Netherlands - 1 July 1875
New Zealand (including the Ross Dependency) - 1 October 1907
-
Cook Islands
Niue
Tokelau
Nicaragua - 1 May 1882
Niger - 12 June 1961
Nigeria - 10 July 1961
Norway - 1 July 1875
O
Oman - 17 August 1971
P
Pakistan - 10 November 1947
Panama - 11 June 1904
Papua New Guinea - 4 June 1976
Paraguay - 1 July 1881
Peru - 1 April 1879
Philippines - 1 January 1922
Poland - 1 May 1919
Portugal - 1 July 1875
Q
Qatar - 31 January 1969
R
Romania - 1 July 1875
Russia - 1 July 1875
Rwanda - 6 April 1963
S
Saint Kitts and Nevis - 11 January 1988
Saint Lucia - 10 July 1980
Saint Vincent and the Grenadines - 3 February 1981
Samoa - 9 August 1989
San Marino - 1 July 1915
São Tomé and Príncipe - 22 August 1977
Saudi Arabia - 1 January 1927
Senegal - 14 June 1961
Serbia - 1 July 1875; 24 December 1921; 18 June 2001
Seychelles - 7 October 1977
Sierra Leone - 29 January 1962
Singapore - 8 January 1966
Slovakia - 18 May 1920; 18 March 1993
Slovenia - 24 December 1921; 27 August 1992
Solomon Islands - 4 May 1984
Somalia - 1 April 1959
South Africa - 1 January 1893; 22 August 1994
South Sudan - 4 October 2011
Spain - 1 July 1875
Sri Lanka - 13 July 1949
Sudan - 28 July 1956
Suriname - 1 May 1877; 20 April 1976
Swaziland - 7 November 1969
Sweden - 1 July 1875
Switzerland - 1 July 1875
Syria - 12 May 1931; 15 May 1946
T
Tajikistan - 9 June 1994
Tanzania - 29 March 1963
Thailand - 1 July 1885
Timor-Leste - 28 November 2003
Togo - 21 March 1962
Tonga (including Niuafo'ou) - 26 January 1972
Trinidad and Tobago - 15 June 1963
Tunisia - 1 July 1888
Turkey - 1 July 1875
Turkmenistan - 26 January 1993
Tuvalu - 3 February 1981
U
Uganda - 13 February 1964
Ukraine - 13 May 1947
United Arab Emirates - 30 March 1973
United Kingdom - 1 July 1875
- Acceded automatically as Crown dependencies of the United Kingdom
Guernsey
Isle of Man
Jersey
- British overseas territories - 1 April 1877
Anguilla
Bermuda
British Indian Ocean Territory
British Virgin Islands
Cayman Islands
Falkland Islands
Gibraltar
Montserrat
Pitcairn Islands
South Georgia and the South Sandwich Islands
Saint Helena, Ascension and Tristan da Cunha
- Dependencies of St Helena
- Ascension
Tristan da Cunha
Turks and Caicos Islands
United States - 1 July 1875
- Territories coming within the UPU's jurisdiction by virtue of article 23 of the UPU Constitution
Guam
Puerto Rico
American Samoa
United States Virgin Islands
Northern Mariana Islands
Uruguay - 1 July 1880
Uzbekistan - 24 February 1994
V
Vanuatu - 16 July 1982
Vatican City - 1 June 1929
Venezuela - 1 January 1880
Vietnam - 20 October 1951
Y
Yemen - 1 January 1930
Z
Zambia - 22 March 1967
Zimbabwe - 31 July 1981
