Oceans and Seas

The following table lists the world's oceans and seas, according to area and average depth, including the Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern Ocean, Mediterranean Sea, Arctic Ocean, Caribbean Sea, Bering Sea, and more.

Greatest known
Place of
greatest known depth
sq. mi.sq. kmft.mft.m
Pacific Ocean60,060,700155,557,00013,2154,02836,19811,033Mariana Trench
Atlantic Ocean29,637,90076,762,00012,8803,92630,2469,219Puerto Rico Trench
Indian Ocean26,469,50068,556,00013,0023,96324,4607,455Sunda Trench
Southern Ocean17,848,30020,327,00013,100?16,4004,000?5,00023,7367,235South Sandwich Trench
Arctic Ocean5,427,00014,056,0003,9531,20518,4565,6257745'N; 175W
Mediterranean Sea21,144,8002,965,8004,6881,42915,1974,632Off Cape Matapan, Greece
Caribbean Sea1,049,5002,718,2008,6852,64722,7886,946Off Cayman Islands
South China Sea895,4002,319,0005,4191,65216,4565,016West of Luzon
Bering Sea884,9002,291,9005,0751,54715,6594,773Off Buldir Island
Gulf of Mexico615,0001,592,8004,8741,48612,4253,787Sigsbee Deep
Okhotsk Sea613,8001,589,7002,74983812,0013,65814610'E; 4650'N
East China Sea482,3001,249,2006171889,1262,7822516'N; 125E
Hudson Bay475,8001,232,300420128600183Near entrance
Japan Sea389,1001,007,8004,4291,35012,2763,742Central Basin
Andaman Sea308,000797,7002,85487012,3923,777Off Car Nicobar Island
North Sea222,100575,200308942,165660Skagerrak
Red Sea169,100438,0001,6114917,2542,211Off Port Sudan
Baltic Sea163,000422,200180551,380421Off Gotland
NOTE: For Caspian Sea, see Large Lakes of the World.
1. A decision by the International Hydrographic Organization in spring 2000 delimited a fifth world ocean.
2. Includes Black Sea and Sea of Azov.

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