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| Name | Entry in The World Factbook | |
| Hague,The [US Embassy] | Netherlands | |
| Haifa [US Consular Agency] | Israel | |
| Hainan Dao | China | |
| Halifax [US Consulate General] | Canada | |
| Halmahera | Indonesia | |
| Hamburg [US Consulate General] | Federal Republic of Germany | |
| Hamilton [US Consulate General] | Bermuda | |
| Hanoi | Vietnam | |
| Harare [US Embassy] | Zimbabwe | |
| Hatay | Turkey | |
| Havana [US post not maintained, representation by US Interests Section (USINT) of the Swiss Embassy] | Cuba | |
| Hawaii | United States | |
| Heard Island | Heard Island and McDonald Islands | |
| Helsinki [US Embassy] | Finland | |
| Hermosillo [US Consulate] | Mexico | |
| Hispaniola | Dominican Republic; Haiti | |
| Hokkaido | Japan | |
| Holy See, The | Vatican City | |
| Hong Kong [US Consulate General] | Hong Kong | |
| Honiara [US Consulate] | Solomon Islands | |
| Honshu | Japan | |
| Hormuz, Strait of | Indian Ocean | |
| Horn, Cape (Cabo de Hornos) | Chile | |
| Home, Îles de | Wallis and Futuna | |
| Horn of Africa | Ethiopia; Somalia | |
| Hudson Bay | Arctic Ocean | |
| Hudson Strait | Arctic Ocean | |
| I | Inaccessible Island | St. Helena |
| Indochina | Cambodia; Laos; Vietnam | |
| Inner Mongolia (Nei Mongol) | China | |
| Ionian Islands | Greece | |
| Ionian Sea | Atlantic Ocean | |
| Irian Jaya | Indonesia | |
| Irish Sea | Atlantic Ocean | |
| Islamabad [US Embassy] | Pakistan | |
| Islas Malvinas | Falkland Islands (Islas Malvinas) | |
| Istanbul [US Consulate General] | Turkey | |
| Italian Somaliland | Somalia | |
| Iwo Jima | Japan | |
| Izmir [US Consulate General] | Turkey | |
| J | Jakarta [US Embassy] | Indonesia |
| Japan, Sea of | Pacific Ocean | |
| Java | Indonesia | |
| Java Sea | Indian Ocean | |
| Jeddah [US Consulate General] | Saudi Arabia | |
| Jerusalem [US Consulate General] | Israel; West Bank | |
| Johannesburg [US Consulate General] | South Africa | |
| Juan de Fuca, Strait of | Pacific Ocean | |
| Juan Fernandez, Isla de | Chile | |
| Juventud, Isla de la (Isle of Youth) | Cuba | |
| K | Kabul [US Embassy now closed] | Afghanistan |
| Kaduna [US Consulate General] | Nigeria | |
| Kalimantan | Indonesia | |
| Kamchatka Peninsula (Poluostrov Kamchatka) | Soviet Union | |
| Kampala [US Embassy] | Uganda | |
| Kampuchea | Cambodia | |
| Karachi [US Consulate General] | Pakistan | |
| Kara Sea | Arctic Ocean | |
| Karimata Strait | Indian Ocean | |
| Kathmandu [US Embassy] | Nepal |
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