B
- Bab-el-Mandeb - connects Red Sea to Gulf of Aden / Arabian Sea
- Bab Iskender - between Yemen on the Arabian Peninsula and Djibouti in Africa
- Balabac Strait - between Palawan, Philippines and Borneo
- Bali Strait - between the Indonesian islands of Java and Bali
- Bangka Strait - between Sumatra and Bangka Island (also: Banca, Banka)
- Banks Strait - between Cape Barren Island/Clarke Island and Tasmania
- Bashi Channel - between Mavudis (also called Y'Ami Island), Philippines and Orchid Island, Taiwan
- Bass Strait - between mainland Australia and Tasmania
- Beagle Channel - Tierra del Fuego
- Bering Strait - between Asia and North America
- Bohol Strait - also called Cebu Strait, between Bohol and Cebu in the Philippines
- Bosporus - between Europe and Asia
- Bougainville Strait - between Bougainville Island and Choiseul Island
- Boundary Pass - between British Columbia and Washington state
- Bransfield Strait - between South Shetland Islands and Antarctic Peninsula
- Bungo Channel - between Kyūshū and Shikoku in Japan
Read more about this topic: List Of Straits