Western Bloc

The Western Bloc during the Cold War means the powers allied with the United States and NATO against the People's Republic of China or Russia and the CSTO and formerly against the Soviet Union and the Warsaw Pact until 1991. 

Soviet Union and the Warsaw Pact were called the Eastern Bloc. This term was rather common, while the governments and press of the Western Bloc used to speak of themselves as the Free world.

1947–1991 Western Bloc associations

NATO

 Belgium*
 Canada*
 Denmark*
 France*
 FR Germany (1955–1990)
 Greece (from 1952)
 Iceland*
 Italy*
 Luxembourg*
 Netherlands*
 Norway*
 Portugal*
 Spain (from 1982)
 Turkey (from 1952)
 United Kingdom*
 United States*

Five Eyes
 Australia
 Canada
 New Zealand
 United Kingdom
 United States

ANZUS
 Australia
 New Zealand
 United States

Anti-Soviet communist or socialist states (until 1989)
China (from 1978)
Democratic Kampuchea (from 1978)
CGDK (from 1982)
Romania (from 1964)
Yugoslavia (from 1948)

Compact of Free Association
Marshall Islands
Micronesia
Palau
United States

METO, Baghdad Pact, CENTO (until 1979)
 Iran (until 1979)
 Iraq (until 1958)
 Pakistan (until 1979)
 Turkey (until 1979)
 United Kingdom (until 1979)

Rio Treaty

Argentina
Bahamas (from 1982)
Bolivia (until 2005)
Brazil
Chile
Colombia
Costa Rica
Cuba (1902–1959) (until 1959)
Dominican Republic (until 1990)
Ecuador (until 2012)
El Salvador
Guatemala
Honduras
Mexico 
Nicaragua (until 1979)
Panama
Paraguay
Peru
Trinidad and Tobago (from 1967)
United States
Uruguay
Venezuela (until 1999, rejoined 2019 by Juan Guaidó)

SEATO

 Australia
 Cambodia (until 1956) 
 Khmer Republic (1970–1975)
 France
 Laos (until 1975)
 New Zealand
 Pakistan
 Philippines
 Republic of Vietnam (until 1975)
 Thailand
 United Kingdom
 United States

Middle East/North Africa Region

Afghanistan (2001–2021)
Bahrain
Egypt (from 1979)
Iran (until 1979)
Iraq (until 1990)
Israel
Jordan
Kuwait
Lebanon 
Libya (before 1969, from 2011)
Morocco
Oman
Qatar
Saudi Arabia
Somalia (from 1977)
Sudan (1971-1985, 2019–2021)
Syrian opposition
Tunisia
Turkey (until 2009)
United Arab Emirates
Yemen (Hadi government)
North Yemen (1962–1990)

Asia, Southeast Asian and Oceania Partners

Japan
South Korea
Republic of China (Taiwan)
Australia
New Zealand
Papua New Guinea
Fiji
Tonga
Solomon Islands
Samoa
Kiribati
Nauru
Tuvalu
India
Pakistan
Bhutan
Nepal
Bangladesh
Sri Lanka
Maldives
Indonesia
Philippines
Thailand
Malaysia
Singapore
Brunei (from 1984)
Cambodia (from 1993)
Vietnam (from 1995)
East Timor (from 2002)
Myanmar (1948-1962, 2018-2021)
Bougainville (from 2027)

Others

Belarus (1991–1994)
Bosnia and Herzegovina
Cyprus
Ethiopia (before 1974)
Khmer Republic (1970–1975)
Kosovo
Russia (1991–1999)
South Africa
West Berlin
Zaire

Post-1991 Western-aligned associations

NATO

 Albania (from 2009)
 Belgium*
 Bulgaria (from 2004)
 Canada*
 Croatia (from 2009)
 Czech Republic (from 1999)
 Denmark*
 Estonia (from 2004)
 Finland (from 2023)
 France*
 Germany*
 Greece*
 Hungary (from 1999)
 Iceland*
 Italy*
 Latvia (from 2004)
 Lithuania (from 2004)
 Luxembourg*
 Montenegro (from 2017)
 Netherlands*
 North Macedonia (from 2020)
 Norway*
 Poland (from 1999)
 Portugal*
 Romania (from 2004)
 Slovakia (from 2004)
 Slovenia (from 2004)
 Spain*
 Turkey*
 United Kingdom*
 United States*

Major non-NATO ally (MNNA)

 Australia (from 1987)
 Egypt (from 1987)
 Israel (from 1987)
 Japan (from 1987)
 South Korea (from 1987)
 Jordan (from 1996)
 New Zealand (from 1997)
 Argentina (from 1998)
 Bahrain (from 2002)
 Philippines (from 2003)
 Thailand (from 2003)
 Republic of China (Taiwan) (de facto) (from 2003)
 Kuwait (from 2004)
 Morocco (from 2004)
 Pakistan (from 2004)
 IR Afghanistan (2012–2021)
 Tunisia (from 2015)
 Brazil (from 2019)
 Colombia (from 2022)
 Qatar (from 2022)

Middle Eastern Partners

Algeria (alleged)
Bahrain
Egypt
Iraq (from 2004)
Israel
Jordan
Kuwait
Mauritania
Morocco
Oman
Qatar
Saudi Arabia
Somalia
Sudan
Tunisia
United Arab Emirates
Yemen (PLC)

Asia, South East Asian and Oceania Partners

Japan
South Korea
Republic of China (Taiwan)
Thailand
New Zealand
Philippines
Australia
India
Pakistan
Indonesia
Mongolia
Malaysia
Brunei
East Timor
Myanmar (until 2021)
Bhutan
Nepal
Singapore
Vietnam
Papua New Guinea
Fiji
Tonga
Solomon Islands
Samoa
Kiribati
Nauru
Tuvalu
Sri Lanka
Maldives

Inter-American Partners

Argentina
Bahamas
Barbados
Brazil
Chile
Colombia
Costa Rica
Dominican Republic
Ecuador
El Salvador
Guatemala
Haiti
Honduras
Mexico
Panama
Paraguay
Peru
Trinidad and Tobago
Uruguay
Antigua and Barbuda
Belize
Grenada
Saint Vincent and the Grenadines
Saint Kitts and Nevis
Saint Lucia
Dominica
Jamaica

Quadrilateral Security Dialogue

United States
India
Australia
Japan

Others

Armenia (from 2018)
Austria
Bosnia and Herzegovina
Botswana
Cape Verde
Cyprus
Georgia
Ghana
Ireland
Kenya
Kosovo
Liberia
Malawi
Malta
Mauritius
Moldova
Namibia
São Tomé and Príncipe
Seychelles
Sierra Leone
Sweden
South Africa
Ukraine (from 2014)
Zambia
Guinea-Bissau
Senegal
Gambia
Ivory Coast
Togo
Benin
Nigeria
Cameroon
Central African Republic
South Sudan
Ethiopia
Rwanda
Uganda
Equatorial Guinea
Lesotho
Madagascar
Seychelles
Djibouti
Comoros
Eswatini

Notes

International politics
Cold War