Deepest gulfs

As of 2026-07-08, Gulf of Mexico tops the list with 4,384 m.

1. #1 Gulf of Mexico — 4,384 m

   marginal sea of the Atlantic Ocean

   The Gulf of Mexico is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southwest and south by the Mexican states of Tamaulipas, Veracruz, Tabasco, Campeche, Yucatán, and Quintana Roo; and on the southeast by Cuba. Read more on Wikipedia.

   Wikidata
2. #2 Kamchatka Bay — 2,000 m

   gulf of the Bering Sea

   source Wikidata
3. #3 Kronotsky Gulf — 1,500 m

   gulf of the Pacific Ocean, Russia

   source Wikidata
4. #4 Gulf of Lion — 1,200 m

   bay

   The Gulf of Lion or Gulf of Lions is a wide embayment of the Mediterranean coastline of Catalonia in Spain with Languedoc-Roussillon and Provence in France, extending from Begur in the west to Toulon in the east. Read more on Wikipedia.

   Wikidata
5. #5 Gulf of Ajaccio — 1,048 m

   bay on Corsica

   source Wikidata
6. #6 Gulf of Saint Lawrence — 530 m

   estuary on the east coast of Canada

   The Gulf of St. Lawrence is a gulf that fringes the shores of the provinces of Quebec, New Brunswick, Nova Scotia, Prince Edward Island, Newfoundland and Labrador, in Canada, plus the islands Saint-Pierre and Miquelon, possessions of France, in North America. Read more on Wikipedia.

   Wikidata
7. #7 Gulf of Taranto — 500 m

   bay

   The Gulf of Taranto is a gulf of the Ionian Sea, in Southern Italy. Read more on Wikipedia.

   Wikidata
8. #8 Kandalaksha Gulf — 330 m

   bay of the White Sea

   The Kandalaksha Gulf is located in the Republic of Karelia, and Murmansk Oblast in northwestern Russia. Forming the north-western corner of the White Sea, it is one of four large bays and gulfs of this sea, the others being the Onega Bay (south-west), the Dvina Bay (south), and the Mezen Bay. Read more on Wikipedia.

   Wikidata
9. #9 Gulf of Bothnia — 295 m

   the northernmost arm of the Baltic Sea

   The Gulf of Bothnia is the northernmost arm of the Baltic Sea, between Finland's west coast and the northern part of Sweden's east coast. It is divided into the Bothnian Bay, the (North) Kvarken and the Bothnian Sea. In the south of the gulf lies Åland, between the Sea of Åland and the Archipelago Sea. Read more on Wikipedia.

   Wikidata
10. #10 Gulf of Panama — 220 m

    gulf in the Pacific Ocean

    The Gulf of Panama is a gulf of the Pacific Ocean off the southern coast of Panama, where most of eastern Panama's southern shores adjoin it. The Gulf has a maximum width of 250 kilometres, a maximum depth of 220 metres (722 ft) and the size of 2,400 square kilometres (930 sq mi). The Panama Canal connects the Gulf of Panama with the Caribbean Sea, thus linking the Pacific and Atlantic oceans. The Panamanian capital Panama City is the main urban centre on the gulf shore. Read more on Wikipedia.

    Wikidata