Deepest gulfs

As of 2026-10-17, Gulf of Mexico tops the list with 4,384 m.

1. #1 Gulf of Mexico — 4,384 m

   marginal sea of the Atlantic Ocean

   source 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

   source 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

    source Wikidata