This is a list of state leaders in the 20th century (1951–2000) AD, such as the heads of state, heads of government, and the general secretaries of single-party states.
These polities are generally sovereign states, including states with limited recognition (when recognised by at least one UN member state), but excludes minor dependent territories, whose leaders can be found listed under territorial governors in the 20th century.
For completeness, these lists can include colonies, protectorates, or other dependent territories that have since gained sovereignty.
Angola Cameroon Central African Republic Chad Congo, Democratic Republic of the Congo: Republic of the Equatorial Guinea Gabon São Tomé and Príncipe Burundi Comoros Djibouti Eritrea Ethiopia Kenya Madagascar Mauritius Rwanda Seychelles Somalia Tanzania Uganda Libya Tunisia Egypt Sudan Algeria Morocco Botswana Eswatini/ Swaziland Lesotho Malawi Mozambique Namibia South Africa Zambia Zimbabwe Benin Burkina Faso Cape Verde Gambia Ghana Guinea Guinea-Bissau Ivory Coast Liberia Mali Mauritania Niger Nigeria Senegal Sierra Leone Togo Antigua and Barbuda The Bahamas Barbados Cuba Dominica Dominican Republic Grenada Haiti Jamaica Netherlands Antilles Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines Trinidad and Tobago Belize Costa Rica El Salvador Guatemala Honduras Nicaragua Panama Canada Mexico United States Argentina Bolivia Brazil Chile Colombia Ecuador Guyana Paraguay Peru Suriname Uruguay Venezuela Brunei Cambodia East Timor Indonesia Laos Malaysia Myanmar / Burma Philippines Singapore Thailand Vietnam Afghanistan Bangladesh Bhutan India Maldives Nepal Pakistan Sri Lanka Bahrain Cyprus Iran Iraq Israel Jordan Kuwait Lebanon Oman Palestine Qatar Saudi Arabia Syria Turkey United Arab Emirates Yemen: North Yemen: South Yemen: United Albania Bulgaria Greece Kosovo Yugoslavia: Serbia & Yugoslavia Yugoslavia: Bosnia and Herzegovina Yugoslavia: Croatia Yugoslavia: Macedonia Yugoslavia: Slovenia Estonia Latvia Lithuania Ireland United Kingdom Austria Czechoslovakia Germany Hungary Liechtenstein Poland Switzerland Belarus Moldova Romania Russia Ukraine Denmark Finland Iceland Norway Sweden Italy Malta San Marino Vatican Andorra Portugal Spain Belgium France Luxembourg Monaco Netherlands Armenia Azerbaijan Georgia Australia Papua New Guinea Fiji French Polynesia Kiribati Marshall Islands Micronesia Nauru New Zealand Palau Samoa and American Samoa Solomon Islands Tonga Tuvalu United States Vanuatu