List of state leaders in the 20th century (1901–1950)

This is a list of state leaders in the 20th century (1901–1950) AD, such as the heads of state, heads of government, and the general secretaries of single-party states.

These polities are generally sovereign states, 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.

Leaders of constituent states within the British South Asia, are excluded, and found on this list of state leaders in 20th-century British South Asia.

Angola Cameroon Central African Republic Chad Congo: Belgian Congo: French Equatorial Guinea Gabon São Tomé and Príncipe Great Lakes area Horn of Africa area Indian Ocean Libya Tunisia Egypt Sudan Algeria Morocco and Western Sahara 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 Cuba Dominican Republic Haiti Costa Rica El Salvador Guatemala Honduras Nicaragua Panama Canada Mexico United States Argentina Bolivia Brazil Chile Colombia Ecuador Guyana Paraguay Peru Suriname Uruguay Venezuela Kazakhstan Tibet Uzbekistan China: Qing dynasty China: Since 1912 Japan Korea Mongolia Russia Brunei Cambodia Indonesia Laos Malaysia Myanmar / Burma Philippines Singapore Thailand Timor Vietnam Afghanistan Bahrain Cyprus Iran Iraq Israel Jordan Kuwait Lebanon Oman Qatar Saudi Arabia Syria Turkey United Arab Emirates: Trucial States Yemen: North Yemen: South Albania Bulgaria Greece Yugoslavia Estonia Latvia Lithuania Ireland United Kingdom Austria Czechoslovakia Germany: Small states Bavarian Prussia Upper Rhenish Lower Saxon Upper Saxon Swabian Germany: Unified states Hungary Liechtenstein Poland Switzerland Moldova Romania Russia Ukraine Denmark Finland Iceland Sweden and Norway Norway Sweden Italy Malta San Marino Vatican Andorra Portugal Spain Belgium France Luxembourg Monaco Netherlands Armenia Azerbaijan Georgia Australia Papua New Guinea Chile Fiji French Polynesia New Zealand Samoa and American Samoa Solomon Islands Tuvalu Tonga United States Vanuatu