| Island’s Name | Island group | Country/Dependency |
|---|
|
| Caballo | Manila Bay |  Philippines |
| Cabanaas | Algarve islands |  Portugal |
| Cabbage | Holston River,  Tennessee |  United States |
| Cabrera |  Balearic Islands |  Spain |
| Cacela da Abóbora | Algarve islands | Portugal |
| Cacela | Algarve islands | Portugal |
| Caillou | Timbalier Bay, Louisiana | United States |
| Caja de Muertos |  Puerto Rico | United States |
| Calayan | Babuyan Islands, Cagayan | Philippines |
| Calf of Eday | The North Isles,  Orkney Islands |  United Kingdom, Scotland |
| Calf of Flotta | The South Isles, Orkney Islands | United Kingdom, Scotland |
| Calf of Man |  Isle of Man | Crown dependency |
| Callinan | Stoney Lake,  Ontario |  Canada |
| Calumet | Timbalier Bay, Louisiana | United States |
| Calvert |  British Columbia | Canada |
| Cambalhão | Estremadura islands | Portugal |
| Camelot | St. Lawrence River, Ontario | Canada |
| Cameron |  Nunavut | Canada |
| Cameron | Lake Joseph, Ontario | Canada |
| Camiguin | Babuyan Islands, Cagayan | Philippines |
| Camorta | Central group of the Nicobar Islands |  India |
| Camp | Lake Winnipesaukee,  New Hampshire | United States |
| Campania | British Columbia | Canada |
| Campbell | Torres Strait Islands,  Queensland |  Australia |
| Campbell | Campbell Islands |  New Zealand |
| Campbell | British Columbia | Canada |
| Campbells | Mississippi River,  Illinois | United States |
| Campobello |  New Brunswick | Canada |
| Cancún | Caribbean Sea,  Quintana Roo |  Mexico |
| Candlana Bar | Willamette River,  Oregon | United States |
| Canna | Inner Hebrides | United Kingdom, Scotland |
| Isla del Caño | Bahia de Coronado |  Costa Rica |
| Cannon Rock | | Northern Ireland |
| Cantin | French River, Ontario | Canada |
| Cape Barren | Furneaux Group, Bass Strait,  Tasmania | Australia |
| Cape Breton |  Nova Scotia | Canada |
| Capraia | Tuscan Archipelago |  Italy |
| Caprara | Tremiti Islands | Italy |
| Caprera | Maddalena archipelago,  Sardinia | Italy |
| Capri | Gulf of Naples | Italy |
| Car | Lower Lough Erne |  Ireland |
| Car Nicobar | Northern group of the Nicobar Islands | India |
| Cara | Inner Hebrides | United Kingdom, Scotland |
| Carcass |  Falkland Islands | United Kingdom |
| Isla Carmen | Baja California Sur | Mexico |
| Carmen | Laguna de Términos,  Campeche | Mexico |
| Carmines | York River,  Virginia | United States |
| Carmona | Beira Baixa islands | Portugal |
| Caroline | Line Islands |  Kiribati |
| Carpmael | Georgian Bay, Ontario | Canada |
| Carrington | Great Salt Lake,  Utah | United States |
| Carroll | Mississippi River, Illinois | United States |
| Isla de la Cartuja | Guadalquivir River, Seville,  Andalusia | Spain |
| Cascalheira | Alentejo islands | Portugal |
| Casse-Tete | Timbalier Bay, Louisiana | United States |
| Cast-off | Allegheny River,  Pennsylvania | United States |
| Cat | Bahamas |  Bahamas |
| Cat | Mascarene Islands |  Mauritius |
| Cat | Mississippi River,  Arkansas | United States |
| Cat | Apostle Islands,  Wisconsin | United States |
| Cat | Gulf Coast,  Mississippi | United States |
| Cat Ba | Ha Long Bay |  Vietnam |
| Catalina | Channel Islands of California,  California | United States |
| Catalina De La Romana | La Romana |  Dominican Republic |
| Çatalada | Aegean Sea |  Turkey |
| Catanduanes | Catanduanes, Luzon | Philippines |
| Catfish | Missouri River,  Missouri | United States |
| Caye Caulker | Caribbean Sea |  Belize |
| Cava | Orkney Islands | United Kingdom, Scotland |
| Caviana | Mouth of the Amazon River,  Pará |  Brazil |
| Cavus adasi | Kiremit islands group | Turkey |
| Cayman Brac |  Cayman Islands | United Kingdom |
| Cebu | Visayas | Philippines |
| Cedar | St. Lawrence River, Ontario | Canada |
| Cedar | Willamette River, Oregon | United States |
| Cedros | Pacific Ocean,  Baja California | Mexico |
| Central Coronado | Coronado Islands, Baja California | Mexico |
| Center | San Juan Islands,  Washington | United States |
| Centre | Georgian Bay, Ontario | Canada |
| Cerf | Seychelles |  Seychelles |
| Cessions Towhead | Mississippi River, Arkansas | United States |
| Cezi | Zhoushan Archipelago |  China |
| Chafarinas | Plazas de Soberanía, Strait of Gibraltar | Spain |
| Champlain | Georgian Bay, Ontario | Canada |
| Champlain Monument | Georgian Bay, Ontario | Canada |
| Chandeleur | Louisiana | United States |
| Chandra | Bajuni Islands |  Somalia |
| Ko Chang | Gulf of Thailand |  Thailand |
| Changbai | Zhoushan Archipelago | China |
| Change |  Newfoundland and Labrador | Canada |
| Changzhi | Zhoushan Archipelago | China |
| Chantry | Lake Huron, Ontario | Canada |
| Charles | Nunavut | Canada |
| Charles |  Connecticut | United States |
| Charlton | Nunavut | Canada |
| Chases | Lake Winnipesaukee, New Hampshire | United States |
| Chausey | Channel Islands |  France |
| Cheduba | |  Myanmar |
| Chek Lap Kok |  Hong Kong | China |
| Chełminek | Oder Lagoon islands |  Poland |
| Chelat | Lakshadweep | India |
| Chergui | Kerkenna Islands |  Tunisia |
| Cheung Chau | Islands District, Hong Kong | China |
| Chick | Lake Erie, Ontario | Canada |
| Chicot | Louisiana | United States |
| Chief's | Lake Joseph, Ontario | Canada |
| Chiefs | Lake Couchiching, Ontario | Canada |
| Chillicothe | Illinois River, Illinois | United States |
| Chiloane | |  Mozambique |
| Chiloé | Chiloé Archipelago |  Chile |
| Isla Chincha Centro | Chincha Islands |  Peru |
| Isla Chincha Norte | Chincha Islands | Peru |
| Isla Chincha Sur | Chincha Islands | Peru |
| Chios | Aegean Islands |  Greece |
| Chira | Gulf of Nicoya | Costa Rica |
| Chirinkotan | Kuril Islands  Sakhalin Oblast |  Russia |
| Chirpoy | Kuril Islands Sakhalin Oblast | Russia |
| Chizumulu | Lake Malawi |  Malawi |
| Choctaw Island No. 78 | Mississippi River, Arkansas | United States |
| Choiseul | Melanesia |  Solomon Islands |
| Choupique | Louisiana | United States |
| Chouteau | Mississippi River, Illinois | United States |
| Chovaye | Bajuni Islands | Somalia |
| Chowra | Central group of the Nicobar Islands | India |
| Christian | Georgian Bay, Ontario | Canada |
Christmas  | Indian Ocean | Self-governing Territory of Australia |
| Chrysi | | Greece |
| Cula | Bajuni Islands | Somalia |
| Churchill | Georgian Bay, Ontario | Canada |
| Cicia | Lau Islands of Fiji |  Fiji |
| Čiovo | |  Croatia |
| Île de la Cité | Seine River, Paris | France |
| City | Halifax River,  Florida | United States |
| City | Florida | United States |
| City | Mississippi River,  Iowa | United States |
| City | The Bronx,  New York | United States |
| City | Susquehanna River, Pennsylvania | United States |
| Clackamette | Willamette River, Oregon | United States |
| Clare | Clew Bay islands | Ireland |
| Clarence | South Shetland Islands | Claimed by Argentine Antarctica,  Argentina,
 Antártica Chilena Province of Chile,
and the  British Antarctic Territory of the United Kingdom |
| Isla Clarión | Revillagigedo Islands,  Colima | Mexico |
| Clarion | Allegheny River, Pennsylvania | United States |
| Clark | San Juan Islands, Washington | United States |
| Clarksville | Mississippi River, Illinois | United States |
| Clear | | Ireland |
| Cleenishmeen | Lower Lough Erne | Ireland |
| Clipperton | Pacific Ocean | France |
| Clooney | Louisiana | United States |
| Cloquet | Mississippi River,  Minnesota | United States |
| Club | Georgian Bay, Ontario | Canada |
| Club | St. Lawrence River, Ontario | Canada |
| Coats | Nunavut | Canada |
| Cobra | Algarve islands | Portugal |
| Coburg | Nunavut | Canada |
| Cockburn | Lake Huron, Ontario | Canada |
| Cayo Coco | Greater Antilles |  Cuba |
| Coco | Algarve islands | Portugal |
| Cocos | Pacific Ocean | Costa Rica |
| Cocos |  Guam | United States |
| Cod | Newfoundland and Labrador | Canada |
| Coelleira |  Galicia | Spain |
| Coëtivy | Seychelles | Seychelles |
| Cogley | Allegheny River, Pennsylvania | United States |
| Coiba | Veraguas |  Panama |
| Coleman | Mississippi River, Illinois | United States |
| Coll | Inner Hebrides | United Kingdom, Scotland |
| Collanmore | Clew Bay islands | Ireland |
| Colonsay | Inner Hebrides | United Kingdom, Scotland |
| Comfort | Louisiana | United States |
| Comino | Kemmuna, Maltese Islands |  Malta |
| Cominotto | Maltese Islands | Malta |
| Con Son | Con Dao | Vietnam |
| Conanicut | Narragansett Bay,  Rhode Island | United States |
| Conception | Seychelles | Seychelles |
| Conejera | Balearic Islands | Spain |
| Conejo | Gulf of Fonseca |  Honduras |
| Constance | St. Lawrence River, Ontario | Canada |
| Isla Contadora | Pearl Islands | Panama |
| Cook | |  Cook Islands(self-governing in free association with New Zealand) |
| Coon | Mississippi River, Illinois | United States |
| Coon | Louisiana | United States |
| Copinsay | Orkney Islands | United Kingdom, Scotland |
| Coquet |  England | United Kingdom |
| Coreille | Ottawa River, Ontario | Canada |
| Corfu | Ionian Islands | Greece |
| Corisco | Rio Muni estuary |  Equatorial Guinea |
| Corn Holm | Orkney Islands | United Kingdom, Scotland |
| Cornwall | Nunavut | Canada |
| Cornwall | St. Lawrence River, Ontario | Canada |
| Cornwallis | Nunavut | Canada |
| Cornwallis | South Shetland Islands | Claimed by Argentine Antarctica, Argentina,
Antártica Chilena Province of Chile,
and the British Antarctic Territory of the United Kingdom |
| Coron | | Philippines |
| Coronation | South Orkney Islands | Claimed by the United Kingdom
as part of the Falkland Islands
and by Argentina |
| Corratistune | Upper Lough Erne | Ireland |
| Corregidor | Manila Bay | Philippines |
Corsica  | | France |
| Cortes | Discovery Islands, British Columbia | Canada |
| Corvo |  Azores | Portugal |
| Cosmoledo | Outer Islands of the Seychelles | Seychelles |
| Cotnam | Ottawa River, Ontario | Canada |
| Cottel | Newfoundland and Labrador | Canada |
| Cottonwood Bar | Mississippi River, Louisiana | United States |
| Couba | Mississippi River, Louisiana | United States |
| Coughran's | Lower Lough Erne | Ireland |
| Courson | Allegheny River, Pennsylvania | United States |
| Cousin | Seychelles | Seychelles |
| Cousine | Seychelles | Seychelles |
| Cove | Lake Huron, Ontario | Canada |
| Cove | Lake Winnipesaukee, New Hampshire | United States |
| Cow | Rice Lake, Ontario | Canada |
| Cow | Lake Winnipesaukee, New Hampshire | United States |
| Cox | British Columbia | Canada |
| Cozumel | Caribbean | Mexico |
| Cracroft | British Columbia | Canada |
| Cranberry | Lake Huron, Ontario | Canada |
| Crane | San Juan Islands, Washington | United States |
| Crawford | Georgian Bay, Ontario | Canada |
| Credit | Mississippi River, Iowa | United States |
| Cres | Adriatic Sea | Croatia |
| Crescent | Bay of Isles, South Georgia | British overseas territory |
| Crescent | Georgian Bay, Ontario | Canada |
| Crete | | Greece |
| Crevinishaughy | Lower Lough Erne | Ireland |
| Crim Rocks | Isles of Scilly | United Kingdom |
| Crooked | Florida | United States |
| Crosier | Charleston Lake, Ontario | Canada |
| Crowlin | Inner Hebrides | United Kingdom, Scotland |
| Crown | Lake Muskoka, Ontario | Canada |
| Crown Prince Frederik | Nunavut | Canada |
| Crozier | Kennedy Channel,  Greenland |  Denmark |
| Cruls (also known as Crulls Islands) | Wilhelm Archipelago | Antarctica |
| Crull's | Allegheny River, Pennsylvania | United States |
| Crump Island | Lesser Antilles |  Antigua and Barbuda |
| Cruninish | Lower Lough Erne | Ireland |
| Cseke-sziget | Danube River |  Hungary |
| Csepel-sziget | Danube River | Hungary |
| Cuba | Greater Antilles | Cuba |
| Culatra | Algarve islands | Portugal |
| Culebra | Causeway Islands, Panama Canal | Panama |
| Culebrita | Culebra archipelago, Puerto Rico | United States |
| Cumberland | Ohio River,  Kentucky | United States |
| Cunda | Aegean Sea | Turkey |
Curaçao  | Lesser Antilles |  Kingdom of the Netherlands |
| Curieuse | Seychelles | Seychelles |
| Cuttyhunk | Elizabeth Islands,  Massachusetts | United States |
| Île aux Cygnes | Seine River, Paris | France |
| Cypress | San Juan Islands, Washington | United States |
| Cyprus | Cyprus |  Cyprus and Akrotiri and Dhekelia, United Kingdom sovereign base areas. ( Northern Cyprus claims and controls one third of the island, although this is not recognised by any country except Turkey.) |