K
- Kalmar Strait - between Öland and Småland
- Kane Basin - between Ellesmere Island and Greenland
- Kanmon Strait - between Honshū and Kyūshū
- Kara Strait - between Novaya Zemlya and Vaygach Island in Russia
- Karimata Strait - between Sumatra and Borneo
- Kerch Strait - between Crimea and Russia
- Kill Van Kull - between Staten Island and Bayonne, New Jersey
- Kitan Strait - between Awaji Island and the island Honshū in Japan
- Korea Strait - between Korea and Japan
- Kvarken - between Sweden and Finland
- Kwangtung Strait
Read more about this topic: List Of Straits