- Baghdad, Iraq; Baku, Azerbaijan; Bamako, Mali; Bandar Seri Begawan, Brunei; Bangkok, Thailand
- Bangui, Central African Republic; Banjul, Gambia; Basseterre, Saint Kitts and Nevis; Beijing, China; Beirut, Lebanon
- Belgrade, Serbia; Belmopan, Belize; Berlin, Germany; Bern, Switzerland (de facto); Bishkek, Kyrgyzstan
- Bissau, Guinea-Bissau; Bloemfontein, South Africa (judicial); Bogotá, Colombia; Brasília, Brazil; Bratislava, Slovakia
- Brazzaville, R. Congo; Bridgetown, Barbados; Brussels, Belgium; Bucharest, Romania; Budapest, Hungary
- Buenos Aires, Argentina; Bujumbura, Burundi (de facto)