| Rank | Country | Maritime claims |
| Greenland | territorial sea: 3 nm
exclusive fishing zone: 200 nm or agreed boundaries or median line
continental shelf: 200 nm or agreed boundaries or median line |
| Grenada | territorial sea: 12 nm
exclusive economic zone: 200 nm |
| Guam | territorial sea: 12 nm
exclusive economic zone: 200 nm |
| Guatemala | territorial sea: 12 nm
exclusive economic zone: 200 nm
continental shelf: 200-m depth or to the depth of exploitation |
| Guernsey | territorial sea: 3 nm
exclusive fishing zone: 12 nm |
| Guinea | territorial sea: 12 nm
exclusive economic zone: 200 nm |
| Guinea-Bissau | territorial sea: 12 nm
exclusive economic zone: 200 nm |
| Guyana | territorial sea: 12 nm
exclusive economic zone: 200 nm
continental shelf: 200 nm or to the outer edge of the continental margin |
| Haiti | territorial sea: 12 nm
contiguous zone: 24 nm
exclusive economic zone: 200 nm
continental shelf: to depth of exploitation |
| Heard Island and McDonald Islands | territorial sea: 12 nm
exclusive fishing zone: 200 nm |
| Holy See (Vatican City) | none (landlocked) |
| Honduras | territorial sea: 12 nm
contiguous zone: 24 nm
exclusive economic zone: 200 nm
continental shelf: natural extension of territory or to 200 nm |
| Hong Kong | territorial sea: 3 nm |
| Hungary | none (landlocked) |
| Iceland | territorial sea: 12 nm
exclusive economic zone: 200 nm
continental shelf: 200 nm or to the edge of the continental margin |
| India | territorial sea: 12 nm
contiguous zone: 24 nm
exclusive economic zone: 200 nm
continental shelf: 200 nm or to the edge of the continental margin |
| Indian Ocean | void |
| Indonesia | measured from claimed archipelagic straight baselines
territorial sea: 12 nm
exclusive economic zone: 200 nm |
| Iran | territorial sea: 12 nm
contiguous zone: 24 nm
exclusive economic zone: bilateral agreements or median lines in the Persian Gulf
continental shelf: natural prolongation |
| Iraq | territorial sea: 12 nm
continental shelf: not specified |
| Ireland | territorial sea: 12 nm
exclusive fishing zone: 200 nm |
| Isle of Man | territorial sea: 12 nm
exclusive fishing zone: 12 nm |
| Israel | territorial sea: 12 nm
continental shelf: to depth of exploitation |
| Italy | territorial sea: 12 nm
continental shelf: 200 m depth or to the depth of exploitation |
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