A
- Agate Pass - Puget Sound
- Agattu Strait - Aleutians
- Akashi Strait - Japan
- Alas Strait - between Lombok and Sumbawa in Indonesia
- Alor Strait - Lesser Sunda Islands in Indonesia
- Amchitka Pass - Aleutians
- Anegada Passage - between the Virgin Islands and Anguilla
- Anguilla Channel - between Anguilla and Saint Martin
- Arthur Kill - between Staten Island and New Jersey
Read more about this topic: List Of Straits