| Island's Name | Island group(s) | Country/Countries |
|---|
|
| Haaf Gruney |  Shetland Islands |  Scotland |
| Hadseløya | Vesterålen |  Norway |
| Hailuoto | |  Finland |
| Hainan | |  China |
| Hajógyári-sziget | Danube River |  Hungary |
| Halfmoon | Georgian Bay  Ontario |  Canada |
| Half Moon | South Shetland Islands | Claimed by Argentine Antarctica,  Argentina,  Antártica Chilena Province of  Chile, and  British Antarctic Territory of the United Kingdom |
| Half Moon |  Louisiana |  United States |
| Halfmile | Lake Winnipesaukee,  New Hampshire | United States |
| Halib | |  Eritrea |
| Halifax | |  Namibia |
| Halki | Dodecanese |  Greece |
| Hallig Habel | North Frisian Islands |  Germany |
| Hamburger Hallig | North Frisian Islands | Germany |
| Hamilton Island | Whitsundays, Australia |  Australia |
| Hanerahu | Väinameri Sea |  Estonia |
| Hanikatsi laid | Väinameri Sea | Estonia |
| Hans | Kennedy Channel of Nares Strait | Claimed by both  Denmark and Canada |
| Hao |  Tuamotus,  French Polynesia |  France |
| Hara | Gulf of Finland | Estonia |
| Harat | Dahlak Archipelago | Eritrea |
| Harbour Round |  Newfoundland and Labrador | Canada |
| Hareidlandet | Møre og Romsdal | Norway |
| Harilaid | Baltic Sea | Estonia |
| Harmil | Dahlak Archipelago | Eritrea |
| Harris | Rice Lake, Ontario | Canada |
| Hascosay | Shetland Islands | Scotland |
| Hatch | Georgian Bay Ontario | Canada |
| Hateruma | Yaeyama Islands part of the Sakishima Islands part of the Ryukyu Islands |  Japan |
| Hatoma | Yaeyama Islands part of the Sakishima Islands part of the Ryukyu Islands | Japan |
| Hatteras | Outer Banks,  North Carolina | United States |
| Havra | Shetland Islands | Scotland |
| Hawai‘i |  Hawaii | United States |
| Hawar | Hawar Islands |  Bahrain |
| Hawk |  New Jersey | United States |
| Hawkesbury |  British Columbia | Canada |
| Hawks Nest | Lake Winnipesaukee, New Hampshire | United States |
| Hay | Georgian Bay Ontario | Canada |
| Hayden | Columbia River,  Oregon | United States |
| Hayman Island | Whitsundays, Australia | Australia |
| Hecate | British Columbia | Canada |
| Hei Ling Chau | Islands District,  Hong Kong | China |
| Heimaey | Vestmannaeyjar |  Iceland |
| Helgö | Lake Mälaren |  Sweden |
| Heligoland | Heligoland Bight,  Schleswig-Holstein | Germany |
| Helliar Holm |  Orkney Islands | Scotland |
| Helnæs | Islands of the waters south of Funen | Denmark |
| Hen | Lake Erie, Ontario | Canada |
| Hen and Chicken | Georgian Bay Ontario | Canada |
| Henderson |  Pitcairn Islands | British overseas territories |
| Henderson | Shackleton Ice Shelf, Antarctica | |
| Henderson | Ohio River,  Kentucky | United States |
| Hendurabi | Persian Gulf |  Iran |
| Hengam | Persian Gulf | Iran |
| Henry | San Juan Islands,  Washington | United States |
| Isle aux Herbes |  Alabama | United States |
| Hereheretue | Duke of Gloucester Islands, Tuamotus, French Polynesia | France |
Herm  | Channel Islands |  Guernsey |
| Hermit | Lake Winnipesaukee, New Hampshire | United States |
| Heron | Lake Mead,  Nevada | United States |
| Heron Island | Queensland, Australia | Australia |
| Herrs | Allegheny River,  Pennsylvania | United States |
| Hertsön | | Sweden |
| Herschel | Lake Huron Ontario | Canada |
| Herschel |  Yukon | Canada |
| Hertzberg | Georgian Bay Ontario | Canada |
| Hess | Susquehanna River, Pennsylvania | United States |
| Hesselø | The Kattegat | Denmark |
| Hestan | Solway Firth, Scotland | United Kingdom |
| Hestur |  Faroe Islands | Denmark |
| Heybeliada | Princes' Islands |  Turkey |
| Hickory | West Lake Ontario | Canada |
| Hiddensee | Islands of the Baltic Sea | Germany |
| Hiiumaa | West Estonian archipelago; Baltic Sea | Estonia |
| Hilbre Island | Hilbre Islands | United Kingdom |
| Hildasay | Shetland Islands | Scotland |
| Hinchinbrook Island | North Queensland, Australia | Australia |
| Hinnøya | Vesterålen | Norway |
| Hisingen | Kattegat, Västergötland and Bohuslän | Sweden |
| Hispaniola | Antilles |  Haiti and  Dominican Republic |
| Hitra | Trondheimsfjord | Norway |
| Hiu | Torres Islands |  Vanuatu |
| Hiwassee | Chickamauga Lake,  Tennessee | United States |
| Hjelm | | Denmark |
| Hjortø | Islands of the waters south of Funen | Denmark |
| Hoak | Susquehanna River, Pennsylvania | United States |
| Hobbs | Tennessee River, Alabama | United States |
| Hobulaid | Väinameri Sea | Estonia |
| Hoëdic |  Bretagne | France |
| Hoeksche Waard |  South Holland |  Netherlands |
| Hoffman | Illinois River,  Illinois | United States |
| Hog | North Channel, Ontario | Canada |
| Hog | Ottawa River, Ontario | Canada |
| Hog | Essequibo River |  Guyana |
| Hog | Narragansett Bay,  Rhode Island | United States |
| Hog |  Wisconsin | United States |
| Hog |  Michigan | United States |
| Hog | James River,  Virginia | United States |
| Hog | Petaluma River,  California | United States |
| Hog | Tomales Bay, California | United States |
| Hog | Aleutian Islands,  Alaska | United States |
| Hokkaidō | Japanese Archipelago | Japan |
| Holm of Faray | The North Isles, Orkney Islands | Scotland |
| Holm of Huip | The North Isles, Orkney Islands | Scotland |
| Holm of Papay | The North Isles, Orkney Islands | Scotland |
| Holm of Scockness | The North Isles, Orkney Islands | Scotland |
| Hong Kong Island | Hong Kong | China |
| Honshū | Japanese Archipelago | Japan |
| Hooge | North Frisian Islands | Germany |
| Hope | British Columbia | Canada |
| Hope | Georgian Bay, Ontario | Canada |
| Hopen | Svalbard | Norway |
| Hõralaid | Väinameri Sea | Estonia |
| Hormuz | Persian Gulf | Iran |
| Horn |  Mississippi | United States |
| Hornby | Gulf Islands, British Columbia | Canada |
| Horse | Thimble Islands,  Connecticut | United States |
| Horse | Shetland Islands | Scotland |
| Horse | Summer Isles | Scotland |
| Horse Islands | Newfoundland and Labrador | Canada |
| Houat | Bretagne | France |
| Housay | Out Skerries, Shetland Islands | Scotland |
| Howakil | Dahlak Archipelago | Eritrea |
| Howe | Saint Lawrence River Ontario | Canada |
| Howell | Missouri River, Missouri | United States |
| Howland Island | | |
| Hoy | The South Isles, Orkney Islands | Scotland |
| Huahine | Windward Islands, Society Islands, French Polynesia | Overseas collectivity of France |
| Hauhine Iti | Windward Islands, Society Islands, French Polynesia | Overseas collectivity of France |
| Hauhine Nui | Windward Islands, Society Islands, French Polynesia | Overseas collectivity of France |
| Huckleberry | Georgian Bay (Parry Sound) Ontario | Canada |
| Hülgerahu | Väinaeri Sea | Estonia |
| Hull | Lake Winnipesaukee, New Hampshire | United States |
| Hunda | The South Isles, Orkney Islands | Scotland |
| Hundvåg | Øyane archipelago, Stavanger Municipality, Rogaland | Norway |
| Huney | Shetland Islands | Scotland |
| Hurricane | Illinois River, Illinois | United States |
| Hurricane | Ohio River, Kentucky | United States |
| Hvar | |  Croatia |
| Hydra | Saronic Islands | Greece |
|
