H
- Hall Basin - between Ellesmere Island and Greenland
- Harlem River - between Manhattan and The Bronx
- Haro Straits - series of straits between British Columbia and Washington state
- Hecate Strait - between Haida Gwaii and British Columbia
- Honguedo Strait - between Anticosti Island and Gaspé Peninsula in Quebec
- Hōyo Strait - between Kyūshū and Shikoku in Japan
- Hudson Strait - between Baffin Island and Quebec
Read more about this topic: List Of Straits