This article features a list of islands sorted by their name beginning with the letter K.
K
| Island's Name | Island group(s) | Country/Countries |
| Kachelotplate | East Frisian Islands |  Germany |
| Kácsa-sziget | Tisza |  Hungary |
| Kagalaska | Andreanof Islands group of the Aleutian Islands,  Alaska |  United States |
| Kahoolawe |  Hawaiian Islands | United States |
| Kakawaie | Lake Kagawong,  Ontario | .svg.png) Canada |
| Kakeromajima | Amami Islands part of the Satsunan Islands part of the Ryukyu Islands |  Japan |
| Kakrasaar | |  Estonia |
| Kalamos | Ionian Islands |  Greece |
| Kalolimnos | Dodecanese | Greece |
| Kalpeni | Lakshadweep |  India |
| Kalymnos | Dodecanese | Greece |
| Kållandsö | Vänern lake |  Sweden |
| Kalsoy |  Faroe Islands |  Denmark |
| Kamenka | Kolyma Bay |  Russia |
| Kanaga | Andreanof Islands group of the Aleutian Islands, Alaska | United States |
| Kapingamarangi | |  Federated States of Micronesia |
| Kapiti | |  New Zealand |
| Kapussaar | | Estonia |
| Karaginsky | Bering Sea Group | Russia |
| Kardiotissa | Cyclades Islands | Greece |
| Karkarpko | Chukchi Sea Group | Russia |
| Karmøy | Rogaland |  Norway |
| Kárpathos | Dodecanese | Greece |
| Karsibór | Oder Lagoon islands |  Poland |
| Kásos | Dodecanese | Greece |
| Kastellórizo | Dodecanese | Greece |
| Kastos | Ionian Islands | Greece |
| Kat O |  Hong Kong |  China |
| Katič | Adriatic Sea |  Montenegro |
| Kau Sai Chau | Hong Kong | China |
| Kauai | Hawaiian Islands | United States |
| Kaukura | Palliser Islands,  Tuamotus,  French Polynesia |  France |
| Kaʻula | Hawaiian Islands | United States |
| Kavaratti | Lakshadweep | India |
| Kayak | Gulf of Alaska, Alaska | United States |
| Kea | Cyclades | Greece |
| Keewaydin |  Florida | United States |
| Kefalonia | Ionian Islands | Greece |
| Kelefesia | Haʻapai |  Tonga |
| Kelleys | Lake Erie,  Ohio | United States |
| Kelly | Mississippi River,  Illinois | United States |
| Kelly's | Conception Bay,  Newfoundland and Labrador | Canada |
| Kenosha | Lake Abitibi Ontario | Canada |
| Kentucky Bend Bar | Mississippi River,  Arkansas and  Mississippi | United States |
| Keppel |  Falkland Islands |  United Kingdom |
| Keri | Gulf of Finland | Estonia |
| Keros | Cyclades | Greece |
| Kerrera | Inner Hebrides |  Scotland |
| Keskmine Vaika | Vaika Islands | Estonia |
| Kesselaid | | Estonia |
| Keswick Island | Queensland | .svg.png) Australia |
| Key Biscayne | Biscayne Bay, Florida | United States |
| Key Haven | Florida Keys, Florida | United States |
| Key Largo | Florida Keys, Florida | United States |
| Key West | Florida Keys, Florida | United States |
| Key Vaca | Florida Keys, Florida | United States |
| Khalki | Dodecanese | Greece |
| Kharg | Persian Gulf |  Iran |
| Khvostof | Rat Islands group of the Aleutian Islands, Alaska | United States |
| Kigigak | Ninglick River, Alaska | United States |
| Kihnu | Gulf of Riga | Estonia |
| Kikaigashima | Amami Islands part of the Satsunan Islands part of the Ryukyu Islands | Japan |
| Kila | |  Cyprus |
| Kili | Ralik Chain |  Marshall Islands |
| Kili Holm | The North Isles,  Orkney Islands | Scotland |
| Killygowan | Upper Lough Erne | United Kingdom |
| Killisnoo | Alexander Archipelago, Alaska | United States |
| Kiltan | Lakshadweep | India |
| Kimolos | Cyclades | Greece |
| Kinali | Princes' Islands |  Turkey |
| Kinaros | Dodecanese | Greece |
| King |  British Columbia | Canada |
| King | Bering Sea, Alaska | United States |
| King | Bass Strait,  Tasmania | Australia |
| King George | South Shetland Islands |  Antarctica |
| King | Allegheny River,  Pennsylvania | United States |
| King's | River Shannon |  Ireland |
| King's | Georgian Bay Ontario | Canada |
| King William |  Nunavut | Canada |
| Kinmen (Quemoy) | Kinmen County |  Republic of China |
| Kinnausy | Lower Lough Erne | Ireland |
| Kiritimati | Line Islands |  Kiribati |
| Kis-Tisza-sziget | Tisza | Hungary |
| Kish | Persian Gulf | Iran |
| Kiska | Rat Islands group of the Aleutian Islands, Alaska | United States |
| Kita daitō | Daitō Islands part of the Ryukyu Islands | Japan |
| Kita Kojima | Senkaku Islands | Japan |
| Kitchener | Lake Huron, Ontario | Canada |
| Kithnos | Cyclades | Greece |
| Kızılada | Mediterranean | Turkey |
| Kleides | | Cyprus |
| Klein Bonaire | .svg.png) Netherlands Antilles |  Kingdom of the Netherlands |
| Klein Curaçao | Netherlands Antilles | Kingdom of the Netherlands |
| Klippa | Haapsalu Bay | Estonia |
| Kloostrisaar | Lake Pühajärv | Estonia |
| Knarrholmen | Southern Gothenburg Archipelago | Sweden |
| Knight | Lake Champlain,  Vermont | United States |
| Knockemdown Key | Florida Keys, Florida | United States |
| Knox Atoll | Ratak Chain | Marshall Islands |
| Kobjeltak | Arno Atoll | Marshall Islands |
| Koch | Nunavut | Canada |
| Kodakarajima | Tokara Islands part of the Satsunan Islands part of the Ryukyu Islands | Japan |
| Kodiak | Kodiak Archipelago, Alaska | United States |
| Koh Dek Koul | |  Cambodia |
| Koh Kong | | Cambodia |
| Koh Poulo Wai | | Cambodia |
| Koh Preab | | Cambodia |
| Koh Pring | | Cambodia |
| Koh Rong | | Cambodia |
| Koh Rong Sanloem | | Cambodia |
| Koh Russei | | Cambodia |
| Koh Sdach | | Cambodia |
| Koh Seh | | Cambodia |
| Koh Tang | | Cambodia |
| Koh Thmei | | Cambodia |
| Koh Thonsay | | Cambodia |
| Kohama | Yaeyama Islands part of the Sakishima Islands part of the Ryukyu Islands | Japan |
| Kőhidi-sziget | | Hungary |
| Kõinastu laid | Väinameri Sea | Estonia |
| Koipsi | Kolga Bay | Estonia |
| Kokanongwi | Georgian Bay, Ontario | Canada |
| Kolfage | Lake Huron, Ontario | Canada |
| Kolmenasva | Matsalu Bay | Estonia |
| Koločep | Elafit islands |  Croatia |
| Koltur | Faroe Islands | Denmark |
| Kolyuchin | Chukchi Sea Group | Russia |
| Koński Smug | Oder Lagoon islands | Poland |
| Koppos | | Cyprus |
| Korčula | Central Dalmatian Archipelago, Adriatic Sea | Croatia |
| Kordylia | | Cyprus |
| Kõrksaar | Gulf of Riga | Estonia |
| Kornati | Kornati archipelago | Croatia |
| Korom-sziget | Tisza | Hungary |
| Kós | Dodecanese | Greece |
| Kosa Meechkyn | Bering Sea Group | Russia |
| Koster Islands | | Sweden |
| Kotlin | | Russia |
| Koufonisi | Cyclades | Greece |
| Kowloon Rock | Hong Kong | China |
| Koyama | Bajuni Islands |  Somalia |
| Kozloduy | Danube River |  Bulgaria |
| Kōzu-shima | Izu Islands | Japan |
| Krassi | Gulf of Finland | Estonia |
| Kräsuli | Tallinn Bay | Estonia |
| Kreenholm | Narva River | Estonia |
| Krk | | Croatia |
| Krenitzin | Fox Islands group of the Aleutian Islands, Alaska | United States |
| Kruzof | Alexander Archipelago, Alaska | United States |
| Ksamil Islands | Ionian Islands |  Albania |
| Kuba-jima | Senkaku Islands | Japan |
| Kubbar | Persian Gulf |  Kuwait |
| Kuchinoerabushima | Ōsumi Islands part of the Satsunan Islands part of the Ryukyu Islands | Japan |
| Kuchinoshima | Tokara Islands part of the Satsunan Islands part of the Ryukyu Islands | Japan |
| Kugong | Belcher Islands, Nunavut | Canada |
| Kuiu | Alexander Archipelago, Alaska | United States |
| Kumari | Väinameri Sea | Estonia |
| Kumbli | Tallinn Bay | Estonia |
| Kumejima | Okinawa Islands part of the Ryukyu Islands | Japan |
| Kunoy | Faroe Islands | Denmark |
| Kuper | Gulf Islands, British Columbia | Canada |
| Kupreanof | Alexander Archipelago, Alaska | United States |
| Kurima | Miyako Islands part of the Sakishima Islands part of the Ryukyu Islands | Japan |
| Kuroshima | Yaeyama Islands part of the Sakishima Islands part of the Ryukyu Islands | Japan |
| Kuruvadweep | Kabini River, Kerala | India |
| Kura Rock | Aran Region |  Azerbaijan |
| Kuusisto | |  Finland |
| Kvaløya | Tromsø Municipality | Norway |
| Kvitsøy | Kvitsøy islands, Rogaland | Norway |
| Kvitøya | Svalbard | Norway |
| Kwajalein | Ralik Chain | Marshall Islands |
| Kyra Panagia | Sporades | Greece |
| Kythira | Ionian Islands | Greece |
| Kythnos | Cyclades | Greece |
| Kyūshū | Japanese Archipelago | Japan |
See also