56 selected
- Not filled in
- Bactria as Indo-Scythian Kingdom (55 B.C.-12 A.D.)
- Bahamas - Commonwealth (1964-present)
- Bahrein - Kingdom (1869-present)
- Bangladesh - People's Republic (1971-present)
- Barbados - Commonwealth (1966-2021)
- Barcelona and Cataluña - County (801-1546)
- Belarus - Republic (1991-present)
- Belgian Congo - (1908-1960)
- Belgium - Kingdom (1830-present)
- Belize - Commonwealth (1973-present)
- Bengalen - Britsh presidency (1765-1919)
- Benin - Republic (1990-present)
- Bermuda - British colony (1609 - 1959)
- Bermuda - British Colony (1959-present)
- BES-islands (Bonaire, St.Eustatius, Saba) - Public bodies within Kingdom of the Netherlands (2010-present)
- Bhutan - Kingdom (1910-present)
- Biafra - Independent Republic (1967-1970)
- Birma - Konbaung Dynasty (1752-1885)
- Birma - Union of Burma (1948-1962)
- Bohemia - Imperial State of the Holy Roman Empire (1198–1806)
- Bohemia and Moravia - German Protectorate (1939-1945)
- Bolivia - Republic (1825-present)
- Bolivia - Spanish Colony (1532-1825)
- Bosnia and Herzegovina - Republic (1992-present)
- Botswana - Republiek (1966-present)
- Brazil - Empire (1808-1889)
- Brazil - Portuguese (1654-1808)
- Brazil - Republic (1889-present)
- British Caribbean Territory (1935-1965)
- British Honduras - British Colony (1862-1981)
- British North Borneo - British Protectorate (1882-1963)
- British Virgin Islands - British Colony (1973-present)
- British West Africa - British Colonies (1894-1958)
- British West Indies - Britsish Colony (1816-1869)
- Britsh-Guiana - Britsh colony (1814-1966)
- Brunei - Sultanate (1885-present)
- Bulgaria - Kingdom (1908-1946)
- Bulgaria - People's Republic (1946-1992)
- Bulgaria - Principality under Turkish Suzerainty (1878-1908)
- Bulgaria - Republic (1992-present)
- Bulgaria - Second Bulgarian Empire (1185-1396)
- Burgundian Netherlands - provincial (1384-1482)
- Burma - Socialist Republic (1962-1988)
- Burundi - Kingdom (1962-1966)
- Burundi - Republic (1966-present)
- Byzantine Empire - Amorian Dynasty (820–867)
- Byzantine Empire - Angelid dynasty (1185–1204)
- Byzantine Empire - Doukas Dynasty (1059–1081)
- Byzantine Empire - Heraclid dynasty (610-695)
- Byzantine Empire - Justinian Dynasty (518-602)
- Byzantine Empire - Komnenen dynasty (1057–1059. 1081-1185)
- Byzantine Empire - Laskarid dynasty (1204-1261)
- Byzantine Empire - Leonid dynasty (457-518)
- Byzantine Empire - Macedonian Dynasty (867–1056)
- Byzantine Empire - Non-dynastic (363-364, 602-610, 813-820, 1056-1057)
- Byzantine Empire - Palaiologan Dynasty (1261–1453)