| Strait | Location | Depth (Meters) | Min Width (Meters) | Max Width (Meters) | Known Crossings |
|---|
| Agate Pass | Part of Puget Sound. Separates Bainbridge Island from the mainland of the Kitsap Peninsula near Suquamish | 6.1 | 91 | 375 | Agate Pass Bridge |
| Agattu Strait | Attu Island and Agattu Island in the Alaskan Aleutians | - | - | - | - |
| Akashi Strait | Connects Seto Inland Sea and Osaka Bay.Separates Honshu from Awaji Island, Japan | 110 | - | 4,000 | Akashi Kaikyo Bridge |
| Alas Strait | Separates Lombok and Sumbawa, two islands of Indonesia | - | - | - | - |
| Alor Strait | Divides the Solor Archipelago from the Alor Archipelago, in the Lesser Sunda Islands of Indonesia. | - | - | - | - |
| Amchitka Pass | It is the largest pass in the Aleutian Islands Alaskan | 1,800 | - | 80,000 | - |
| Anegada Passage | In the Caribbean Sea. Separates the Virgin Islands and Anguilla | 2,300 | - | 127,000 | - |
| Anguilla Channel | In the Caribbean Sea. Separates Anguilla and Saint Martin | - | - | - | Ferry service from Marigot, Saint Martin |
| Arthur Kill | Separates Staten Island and New Jersey | - | - | - | Goethals Bridge, Outerbridge Crossing, and the Arthur Kill Vertical Lift Bridge |
| Augusta's Strait | Aka. Dampier Strait (Indonesia), between the Raja Ampat islands of Waigeo and Batanta, province of West Papua | - | - | - | - |
| Bab-el-Mandeb | Between Yemen on the Arabian Peninsula and Djibouti and Eritrea in the Horn of Africa, connecting the Red Sea to the Gulf of Aden and by extension the Indian Ocean. | 186 | 26,000 | - | - |
| Bab Iskender | The eastern section of the Bab-el-Mandeb straits | 330 | 6,400 | 24,000 | - |
| Balabac Strait | Connects the South China Sea with the Sulu Sea. It separates Balabac Island (Palawan province), Philippines, from Balambangan and the Banggi Islands north of Borneo | 100 | 50,000 | - | - |
| Bali Strait | Separating Java and Bali while connecting the Indian Ocean and the Bali Sea. | 60 | 2,400 | - | Ferry between Ketapang in Java |
| Baltiysk strait | Connects Vistula Bay and Gdańsk Bay | 12 | 400 | - | - |
| Bangka Strait | Separates Sumatra and Bangka Island (also: Banca, Banka) | 27 | 14,000 | 48,000 | - |
| Banks Strait | Separates Cape Barren Island/Clarke Island and Tasmania | - | - | - | - |
| Bashi Channel | Between the Batanes Islands, Philippines and Orchid Island of Taiwan | - | - | - | - |
| Basilan Strait | Lies between Mindanao and Basilan in thePhilippines | - | - | - | - |
| Bass Strait | Divides Mainland Australia and Tasmania | 155 | - | 350,000 | Spirit of Tasmania |
| Beagle Channel | Separates the larger main island of Isla Grande de Tierra del Fuego from various smaller islands | - | 4,800 | - | - |
| Belle Isle strait | Separates Labrador, Canada from the island of Newfoundland | - | 15,000 | 60,000 | Proposed: Newfoundland–Labrador fixed link |
| Bering Strait | Connects the Pacific and Arctic oceans, separating the Chukchi Peninsula of the Russian Far East from the Seward Peninsula of Alaska. | 90 | 82,000 | - | Proposed: Bering Strait crossing |
| Bohai Strait | Connects the Bohai Sea and Yellow Sea. Separates the Liaodong Peninsula, and the Shandong Peninsula | 80 | - | - | - |
| Bonifacio strait | Separates Corsica and Sardinia | 100 | 11,000 | - | - |
| Bosporus | Connects the Black Sea to the Sea of Marmara and separates Europe and Asia | 100 | 700 | - | 15 July Martyrs Bridge, Fatih Sultan Mehmet Bridge, Yavuz Sultan Selim Bridge, and Eurasia Tunnel |
| Bougainville Strait | Separates Choiseul Island, part of Solomon Islands, from Bougainville Island, part of Papua New Guinea. | - | - | - | - |
| Boundary Pass | British Columbia and Washington state. It connects Haro Strait to the south with the Strait of Georgia to the north. | - | - | 23,000 | - |
| Bransfield Strait | Divides South Shetland Islands and the Antarctic Peninsula | 2,000 | - | 100,000 | - |
| Bungo Channel | Separates Kyūshū and Shikoku | - | - | - | - |
| Burias Pass | Separates Bicol Peninsula and Burias Island in the Philippines | - | - | - | - |
| Cabot Strait | Separates Newfoundland and Cape Breton Island in Canada | 550 | - | 130,000 | - |
| Caicos Passage | The Caicos Islands are separated by the Caicos Passage from the closest Bahamian islands, Mayaguana and Great Inagua. | - | - | - | - |
| Canso strait | Separates mainland Nova Scotia and Cape Breton Island, in eastern Canada. | 61 | 1,000 | - | - |
| Cebu Strait (a.k.a. Bohol Strait) | Connects the western part of the Bohol Sea with the Camotes Sea, and separates the island provinces of Cebu and Bohol. | - | - | - | - |
| Chatham Strait | Separates Chichagof Island and Baranof Island to its west from Admiralty Island and Kuiu Island on its east in Alaska. | - | 5,000 | 16,000 | - |
| Chios Strait | Separates the Greek island of Chios from the Anatolian mainland and from the Aegean Region of Turkey. | - | - | - | - |
| Clarence Strait | Separates Prince of Wales Island, on the west side, from Revillagigedo Island and Annette Island, on the east side | - | 5556 | - | - |
| Colvos Passage | Part of Puget Sound. Separates Vashon Island and the Kitsap Peninsula. | - | - | - | - |
| Cook Strait | New Zealand, between the North Island and the South Island | 128 | 22,000 | - | fFerry services run between Picton in the Marlborough Sounds and Wellington |
| Corfu Strait | Separates Corfu and mainland Greece/Albania | - | - | - | - |
| Cozumel Channel | Separate Cozumel Island and the Yucatán Peninsula | - | - | - | - |
| Cross Sound | Chichagof Island to its south and the mainland to its north, of Alaska | - | - | - | - |
| Dalcahue Channel | Part of the Sea of Chiloé that separates Quinchao Island from Chiloé Island, Chile | - | - | - | - |
| Dalco Passage | Part of Puget Sound. Separates Vashon Island and the mainland near Tacoma, USA | - | - | - | - |
| Dampier Strait (Indonesia) (sometimes also known as Augusta's Strait) | Separates the Raja Ampat islands of Waigeo and Batanta, Indonesia | - | - | - | - |
| Dampier Strait (Papua New Guinea) | Separates Umboi Island and New Britain, PNG | - | - | - | - |
| Danish straits | Refers collectively to the Danish straits Oresund, Fehmarn Belt, Little Belt and Great Belt between Scandinavia and Jutland. | - | - | - | Little Belt Bridge, Storstrøm Bridge, Siøsund Bridge, New Little Belt Bridge , Alssund Bridge, Great Belt Bridge, Øresund Bridge |
| Dardanelles | Connects the Sea of Marmara with the Aegean and Mediterranean seas. Separates Europe and Asia | 103 | 1,200 | 6,000 | 1915 Çanakkale Bridge |
| Davis Strait | Separates Baffin Island and Greenland | - | - | - | - |
| Deception Pass | Part of Puget Sound. Separates Whidbey Island in Island County, to Fidalgo Island | - | - | - | Deception Pass Bridge |
| Denmark Strait | Connects the Greenland Sea, an extension of the Arctic Ocean, to the Irminger Sea, a part of the Atlantic Ocean. Separates Greenland from Iceland | 191 | 290,000 | - | - |
| La Désirade Passage | In the Caribbean Sea. Separates the island of la Désirade, from Grande-Terre (Guadeloupe) | - | - | - | - |
| Detroit River | Connects Lake St. Clair and Lake Erie.
Separates the province of Ontario, Canada, and the state of Michigan, USA
(The word "détroit" is French for "strait".) | 16.2 | 800 | 4,000 | Ambassador Bridge, Detroit–Windsor Tunnel, and Michigan Central Railway Tunnel |
| Dixon Entrance | Separates Haida Gwaii from the Alexander Archipelago. The Dixon Entrance is part of the Inside Passage shipping route. | - | - | - | - |
| Dolphin and Union Strait | Connects the Amundsen Gulf, to the Coronation Gulf. Separates Nunavut (Kitikmeot Region), Canada from Victoria Island. | - | 32,000 | 64,000 | - |
| Dominica Passage | In the Caribbean Sea. Separates the islands of Dominica and Marie-Galante, Guadeloupe. | - | - | - | - |
| Dover Straits | The narrowest part of the English Channel | 223 | 33,000 | - | The Channel Tunnel |
| Dragon's Mouths (Bocas del Dragón) | Connects the Gulf of Paria to the Caribbean Sea. Separates Trinidad and Venezuela | - | - | - | - |
| Drake Passage | Connects Atlantic Ocean (Scotia Sea) with the southeastern part of the Pacific Ocean. Separates Cape Horn in Chile at the southern extreme of the South American mainland and the South Shetland Islands of Antarctica | 5,000 | 800,000 | - | - |
| East River | Connects Upper New York Bay to Long Island Sound. Separates Long Island from Manhattan Island, and from the North American mainland. | 51 | - | - | Brooklyn Bridge, Williamsburg Bridge, the Queensboro Bridge, the Manhattan Bridge, the Hell Gate Railroad Bridge, the Triborough Bridge, the Bronx-Whitestone Bridge, the Throgs Neck Bridge and the Rikers Island Bridge |
| Eastern Channel (a.k.a Tsushima Strait) | A channel of the Korea Strait, which lies between Korea and Japan, connecting the Sea of Japan, the Yellow Sea, and the East China Sea. | 140 | 65,000 | - | - |
| English Channel | Great Britain and France | 174 | 34,000 | 240,000 | Channel Tunnel |
| Euripus Strait | Separates the Greek island of Euboea in the Aegean Sea from Boeotia in mainland Greece. | - | 38 | - | Euripus Bridge |
| Falkland Sound | Separates West Falkland and East Falkland | - | - | - | - |
| Fehmarn Belt | Connecting the Bay of Kiel and the Bay of Mecklenburg in the Baltic Sea. Separates the German island of Fehmarn and the Danish island of Lolland. | 30 | 18,600 | - | Fehmarn Belt Fixed Link |
| Fehmarn Sound | Separates Fehmarn and the German mainland | - | - | - | Fehmarn Belt Fixed Link |
| Fisher Strait | Separates Southampton Island (to the northwest) from Coats Island | - | - | - | - |
| Florida strait | Separates Florida and Cuba. Connects the Gulf of Mexico with the Atlantic Ocean. | 1,800 | 150,000 | - | - |
| Taiwan Strait(a.k.a.Formosa Strait) | Taiwan and the Mainland China | 150 | 130,000 | 180,000 | - |
| Foveaux Strait | Separates Stewart Island / Rakiura from the South Island of New Zealand | 56 | 23,000 | 53,000 | Stewart Island § Transport |
| Foxe Channel | Canada: the Foxe Basin (to the north) from Hudson Bay and the Hudson Strait (to the south) | - | - | - | - |
| Freeman Strait | Separating Barentsøya, to the north, from Edgeøya, in the Svalbard archipelago, Norway | - | - | - | - |
| Frozen Strait | Connects Roes Welcome Sound in the west, with Foxe Basin to the east. | - | 19,000 | 32,000 | - |
| Fury and Hecla Strait | Separates Baffin Island to the north and the Melville Peninsula, Canada | - | 2,000 | 20,000 | - |
| Georgia strait | Separates Vancouver Island and mainland British Columbia | 420 | 20,000 | 58,000 | Vancouver Island fixed link |
| Gibraltar strait | Connects the Atlantic Ocean to the Mediterranean Sea and separates Europe from Africa. | 900 | 14,200 | - | Proposed: Strait of Gibraltar crossing |
| Golden Gate Strait | Connects San Francisco Bay to the Pacific Ocean. Separates San Francisco Peninsula and the Marin Peninsula | 115 | 4,800 | - | Golden Gate Bridge |
| Great Belt | Between the major islands of Zealand (Sjælland) and Funen (Fyn) in Denmark. It is one of the three Danish Straits. | 60 | 16,000 | 32,000 | Great Belt ferries, Great Belt Fixed Link |
| Guadeloupe Passage | In the Caribbean Sea. Separates Guadeloupe from Montserrat and from Antigua and Barbuda. | - | - | - | - |
| Gulf of Corryvreckan | Between the islands of Jura and Scarba, in Argyll and Bute, off the west coast of mainland Scotland. | - | - | - | - |
| Gulf of Mannar | Separates India and Sri Lanka | 1,335 | 130 | 275 | - |
| Hall Basin | Between Ellesmere Island and Greenland | - | - | - | - |
| Harlem River | Separates the island of Manhattan the United States mainland | - | - | - | Wards Island Bridge, Robert F. Kennedy Triboro Lift Bridge, Willis Avenue Bridge, Third Avenue Bridge, Lexington Avenue Tunnel, Park Avenue Bridge, Madison Avenue Bridge, 149th Street Tunnel, 145th Street Bridge, Macombs Dam Bridge, Concourse Tunnel, Putnam Bridge, High Bridge, Alexander Hamilton Bridge, Washington Bridge, University Heights Bridge, Broadway Bridge, Henry Hudson Bridge, Spuyten Duyvil Bridge |
| Haro Straits | Connecting the Strait of Georgia to the Strait of Juan de Fuca, separating Vancouver Island and the Gulf Islands in British Columbia, Canada | - | - | 19,000 | - |
| Hecate Strait | Between Haida Gwaii and British Columbia | - | 48,000 | 140,000 | - |
| Honguedo Strait | Between the Gaspésie peninsula and Anticosti Island, Quebec, Canada | - | - | - | - |
| Hormuz strait | Connects between the Persian Gulf and the Gulf of Oman. Separating Oman and Iran, | - | 39,000 | 97,000 | - |
| Hudson Strait | Links the Atlantic Ocean and the Labrador Sea to Hudson Bay in Canada. This strait lies between Baffin Island and Quebec | - | 70,000 | 240,000 | - |
| Indispensable Strait | Between Guadalcanal and Malaita | - | - | - | - |
| Irbe Strait | Connects the Gulf of Riga to the Baltic Sea, Separates the Sõrve Peninsula from the island Saaremaa in Estonia | - | 27,000 | - | - |
| Jamaica Channel | Separates Jamaica and Hispaniola in the Caribbean Sea | 1,200 | 190,000 | - | - |
| Johor Strait | Separates Singapore and Peninsular Malaysia | 40 | - | 1,600 | Johor–Singapore Causeway & Malaysia–Singapore Second Link |
| Jones Sound | Separate Devon Island and the southern end of Ellesmere Island, Canada | - | - | - | - |
| Juan de Fuca strait | Separates Vancouver Island, and Olympic Peninsula | 100 | 19,000 | 40,000 | MV Coho |
| Kalmar Strait | Between the Swedish island of Öland and the Swedish mainland | - | 5,000 | 25,000 | Öland Bridge |
| Kane Basin | Between Greenland and Ellesmere Island, Canada's northernmost. | - | - | 130,000 | - |
| Kanmon Strait | Separating Honshu and Kyushu | - | - | - | Kanmon Tunnels & Kanmonkyo Bridge |
| Kara Strait | Between the southern end of Novaya Zemlya, Russia and the northern tip of Vaygach Island. This strait connects the Kara Sea and the Barents Sea in northern Russia. | 230 | 50,000 | - | - |
| Karimata Strait | Connects the South China Sea to the Java Sea, separating the Indonesian islands of Belitung and Borneo (Kalimantan) | - | - | 206,000 | - |
| Kattegat | Separates Jutland and Halland and neighboring provinces. | - | - | - | - |
| Kerch Strait | Connects the Black Sea and the Sea of Azov, separating the Kerch Peninsula of Crimea from Taman Peninsula of Russia's Krasnodar Krai | 18 | 3,100 | 15,000 | Crimean Bridge |
| Kildin Strait | Separating the island Kildin and the Kola Peninsula, Russia. | - | - | - | - |
| Kill Van Kull | Between Staten Island and Bayonne, New Jersey | - | 305 | - | Bayonne Bridge |
| Kitan Strait | Separates Awaji Island from Honshu and connects the Osaka Bay in the north to the Kii Channel | - | - | 11,000 | - |
| Korea Strait | Separates Korea and Japan | 100 | | 200,000 | Proposed: Japan–Korea Undersea Tunnel |
| Gulf of Ephesus (Kólpos Ephésou), or Gulf of Kuşadası | Separating the Greek island of Samos from the mainland of Turkey. | - | - | - | - |
| Kvarken | Connects Bothnian Bay with the Bothnian Sea and Separates Sweden and Finland | 25 | - | 70,000 | The ferry route between Umeå and Vaasa connects Sweden and Finland. |
| Lancaster Sound | Between Devon Island and Baffin Island, forming the eastern entrance to the Parry Channel and the Northwest Passage. | - | - | - | - |
| Langeland's Belt | Langeland and Lolland | - | - | - | - |
| Lembeh Strait | Between Sulawesi and Lembeh islands in Indonesia | - | - | - | - |
| Little Belt | Between the island of Funen and the Jutland Peninsula in Denmark. It is one of the three Danish Straits that drain and connect the Baltic Sea to the Kattegat strait | 81 | 800 | 28,000 | Old Little Belt Bridge and the New Little Belt Bridge |
| Lombok Strait | Between Bali and Lombok, Indonesia. Part of the Wallace Line separating the Indomalayan and the Australasian Biogeographic realms | 250 | 20,000 | 40,000 | - |
| Luzon Strait | Between Taiwan and Luzon, Philippines and connects the Philippine Sea to the South China Sea | 4,000 | - | 250,000 | - |
| Mackinac strait | Connects Lake Michigan and Lake Huron. Separates Michigan's Upper and Lower Peninsulas | 90 | 8,000 | - | Mackinac Bridge |
| Magellan strait | Separates South America and Tierra del Fuego archipelago | - | 2,000 | - | - |
| Main Channel | Connects Lake Huron and Georgian Bay. Separates Ontario's Manitoulin Island and the Bruce Peninsula. | - | - | - | - |
| Makassar Strait | Between the islands of Borneo and Sulawesi in Indonesia. | - | - | - | - |
| Malacca Strait | Peninsular Malaysia and Sumatra, Indonesia | 200 | 65.000 | 250,000 | - |
| Maliku Kandu | Between the Maldives and India | - | - | - | - |
| Malta Channel | Separates Malta from the southern tip of Sicily. | 171 | 81,000 | 102,000 | - |
| Maqueda Channel | Separating the island of Catanduanes from of Luzon. The strait connects Lagonoy Gulf and the Philippine Sea. | - | - | - | - |
| Marie-Galante Passage | Separates the island of Marie-Galante from Guadeloupe and Îles des Saintes. | - | - | - | - |
| Martinique Channel | Separates Saint Vincent and the Grenadines and Grenada | - | - | - | - |
| Martinique Passage | Separates Dominica and Martinique | - | - | - | - |
| McClure Strait | Separates Melville Island and Banks Island. Connects the Beaufort Sea with Viscount Melville Sound. | - | - | - | - |
| Menai Strait | Between Anglesey and mainland Wales | - | 400 | 25,000 | Menai Suspension Bridge & Britannia Bridge |
| Messina strait | Between Sicily and Italian peninsula | 250 | 3,100 | 5,100 | Planned: Strait of Messina Bridge |
| The Minch | Divides the Outer Hebrides from the mainland of Scotland | - | 14,000 | 45,000 | - |
| Mindoro Strait | Connecting the South China Sea with the Sulu Sea in the Philippines. It separates Mindoro Island from Busuanga Island. | - | - | - | - |
| Mona Passage | Separates the islands of Hispaniola and Puerto Rico in the Greater Antilles of the Caribbean region | - | - | 130,000 | - |
| Mytilini Strait | Separates Mainland Turkey and the island of Lesbos | - | - | - | - |
| Myeongnyang Strait | Between Jindo Island and the Korean peninsula | - | 293 | - | Jindo Bridge |
| Nares Strait | Separates Ellesmere Island and Northern Greenland and connects Baffin Bay with Lincoln Sea / the Arctic Sea | 600 | - | 35,000 | - |
| The Narrows | Separates Staten Island and Brooklyn in New York City, U.S.A | - | - | - | Verrazzano-Narrows Bridge |
| Naruto Strait | Between Awaji Island and the island Shikoku in Japan | - | - | - | Ōnaruto Bridge |
| Nemuro Strait | Separating Kunashir Island of the Kuril Islands, Russia (claimed by Japan) from the Shiretoko Peninsula, Hokkaidō, Japan. | 2,500 | - | 24,000 | - |
| Nicholas Channel | Between Cuba and the Bahamas | - | - | - | - |
| North Channel (British Isles) | Between Northern Ireland and Scotland | 312 | 19,000 | - | - |
| Northumberland Strait | Between Prince Edward Island and New Brunswick/Nova Scotia, Canada | 65 | 13,000 | - | Confederation Bridge |
| Old Bahama Channel | Between Cuba and the Bahamas | - | 22,500 | - | - |
| Ombai Strait | Separates the Alor Archipelago from the islands of Wetar, Atauro, and Timor in the Lesser Sunda Islands, Indonesia. | 3,250 | 27,000 | - | - |
| Øresund | Divides Danish Zealand and Swedish Scania | 40 | 4,000 | 28,000 | Øresund Bridge |
| Otranto strait | Connects the Adriatic Sea with the Ionian Sea and divides Italy from Albania | 18 | 72,000 | - | - |
| Palk Strait | Separates India and Sri Lanka | 35 | 64,000 | 137,000 | - |
| Panama Canal | Connects the Caribbean Sea with the Pacific Ocean | 12.6 | 33.5 | - | Centennial Bridge & Bridge of the Americas |
| Parry Channel | Runs through the central Canadian Arctic Archipelago. | - | - | - | - |
| Pearse Canal | Separates Alaska and islands of British Columbia | - | - | - | - |
| Pentland Firth | Separates Orkney archipelago and the mainland of Scotland | - | - | - | - |
| La Pérouse Strait (also Soya Strait) | Divides the Russian island of Sakhalin from the Japanese island of Hokkaidō, and connects the Sea of Japan with the Sea of Okhotsk | 140 | 42,000 | - | - |
| Pertuis d'Antioche | Separates western France from Île de Ré to the north, and Oléron to the south. | - | - | - | - |
| Pickering Passage | Separates Hartstine Island from the mainland USA | - | - | - | - |
| Pitt Strait (Indonesia) (a.k.a. Sagewin Strait) | Separates the Raja Ampat islands of Batanta and Salawati, in Indonesia and links the Ceram Sea to the Pacific Ocean. | - | - | - | - |
| Pitt Strait (New Zealand) | Chatham Island and Pitt Island in the Chatham Islands | - | - | 25,000 | - |
| Polillo Strait | Polillo Island and Luzon Island, Philippine archipelago | - | - | - | - |
| Port Washington Narrows | Puget Sound | - | - | - | - |
| Porte des Morts | Links Lake Michigan and Green Bay between the northern tip of the Door Peninsula and the southernmost of the Potawatomi Islands | - | - | - | - |
| Prince of Wales Strait | Separates Banks Island and Victoria Island in Canada | - | - | - | - |
| Prince Regent Inlet | West end of Baffin Island (Brodeur Peninsula) and Somerset Island on the west, of Canada | - | 64,000 | 105,000 | - |
| Qiongzhou Strait | Separates the island of Hainan and Guangdong, China | 120 | - | 30,000 | - |
| Queen Charlotte Strait | Separates Vancouver Island and the mainland of British Columbia, Canada | - | - | - | - |
| Rich Passage | Separates Bainbridge Island from the Manchester area of Kitsap Peninsula. In the Puget Sound | - | - | - | - |
| Robeson Channel | Separates Ellesmere Island and Greenland | - | 18,000 | 29,000 | - |
| Roes Welcome Sound | Between the mainland on the west and Southampton Island | - | 24,000 | 113,000 | - |
| Pitt Strait (Indonesia) | Separates the Raja Ampat islands of Batanta and Salawati and links the Ceram Sea to the Pacific Ocean. | - | - | - | - |
| Saint-Barthélemy Channel | Between Saint Barthélemy and Saint Martin in the Caribbean Sea | - | - | - | - |
| St. Clair River | Links Lake Huron into Lake St. Clair, forming part of the international boundary between Canada and the United States | - | - | - | - |
| St George's Channel | Between Ireland and Wales | - | - | - | - |
| St George's Channel | Between New Britain and New Ireland in the Bismarck Archipelago, Papua New Guinea | - | - | - | - |
| Saint Lucia Channel | Between Martinique and Saint Lucia in the Caribbean Sea | - | - | - | - |
| St. Marys River | Between Lake Superior and Lake Huron / and the province of Ontario, Canada, and the state of Michigan, USA | - | - | - | Sault Ste. Marie International Railroad Bridge |
| Saint Vincent Passage | Between Saint Vincent and Saint Lucia in the Caribbean | - | - | 37,000 | - |
| Les Saintes Passage | Separates the archipelago of Îles des Saintes, from Basse-Terre Island (Guadeloupe) | - | - | 12,500 | - |
| Sakonnet River | Between Aquidneck Island and Tiverton and Little Compton, Rhode Island. | 6.1 | 500 | 3,200 | Sakonnet River Rail Bridge, Sakonnet River Bridge, Stone Bridge |
| San Bernardino Strait | Between Luzon and Samar in the Philippines | - | - | - | - |
| San Juanico Strait | Between Samar and Leyte islands in the Philippines | - | 2,000 | - | San Juanico Bridge |
| Scapa Flow | Between several of the Orkney islands | - | - | - | - |
| Serpent's Mouth | Between Trinidad and Venezuela | - | 14,000 | - | - |
| Shelikof Strait | Between the Alaska mainland to the west and Kodiak and Afognak islands to the east, in the USA | - | 40,000 | 48,000 | - |
| Sibutu Passage | Between Borneo and the Sulu Archipelago | - | - | 29,000 | - |
| Sicilian Strait | Between Sicily and Africa | 316 | - | 145,000 | - |
| Singapore Strait | Connects the Strait of Malacca and the South China Sea. Separates Singapore and Indonesia (Sumatra). | 22 | 16,000 | - | - |
| Skagerrak | Separating Denmark from Norway and Sweden | - | 80,000 | 140,000 | - |
| Skog Passage | West of Joinville Island, Antarctica | - | - | - | - |
| Smith Sound | Between Ellesmere Island (Canada) and Greenland | - | - | - | - |
| The Solent | Between the Isle of Wight and Hampshire | - | 1.6 | 8 | - |
| South Kvarken | Between the Finnish Åland and Sweden | - | - | 30,000 | - |
| La Pérouse Strait | Separates Sakhalin (Karafuto) (Russia) from Hokkaidō (Japan) | 140 | - | 42,000 | - |
| Sumba Strait | Between Flores and Sumba, Indonesia | - | - | - | - |
| Sunda Strait | Between Sumatra and Java | - | - | - | - |
| Surigao Strait | Between Leyte and Mindanao islands in the Philippines | - | - | 25,000 | - |
| The Swale | Between the Isle of Sheppey and the mainland of Kent, England. | - | - | - | - |
| Tablas Strait | Between Mindoro and Panay islands in the Philippines | 545 | - | - | - |
| Tacoma Narrows | Separates the Kitsap Peninsula from the city of Tacoma in the Puget Sound | - | - | - | Tacoma Narrows Bridges (State Route 16) |
| Taiwan Strait | Between Taiwan and Mainland China | 150 | 130,000 | 180,000 | - |
| Tanon Strait | Between Negros and Cebu islands in the Philippines | 500 | 5,000 | 27,000 | - |
| Strait of Tartary | Separates the island of Sakhalin from mainland Asia | >4 | 7,000 | 23,000 | - |
| Ticao Pass | Separates Ticao Island from the Bicol Peninsula in the Philippines. | - | - | - | - |
| Strait of Tiran | Between the Sinai peninsula and Saudi Arabia. Connect the Gulf of Aqaba and the Red Sea. | 290 | - | 13,000 | - |
| Tolo Channel | Narrow opening to the Tolo Harbour in Hong Kong | - | - | - | - |
| Tongass Passage | Between Alaska and British Columbia | - | - | - | - |
| Torres Strait | Between New Guinea and Australia | 15 | 150,000 | - | - |
| Tsugaru Strait | Between Hokkaidō and Honshū | 200 | 19,500 | - | Seikan Tunnel |
| Viscount Melville Sound | Between Victoria Island and Prince of Wales Island and the Queen Elizabeth Islands | - | - | - | - |
| Vitiaz Strait | Between New Britain and the Huon Peninsula, northern New Guinea. | - | - | - | - |
| Wetar Strait | Between East Timor and the Indonesian island of Wetar | - | - | 42,600 | - |
| Windward Passage | Between Cuba and Hispaniola | 1,700 | - | 80,000 | - |
| Yucatán Channel | Between Mexico and Cuba. Connects the Yucatán Basin of the Caribbean Sea with the Gulf of Mexico | 2,800 | - | 217,000 | - |