| Island’s Name | Island group(s) | Country/Countries |
| Rab | |  Croatia |
| Rabbit | There are four Rabbit islands in NZ, the best known is in Tasman Bay |  New Zealand |
| Rabbit | Lower Lough Erne |  Ireland |
| Rabbit | |  Lebanon |
| Rabbit | Calcasieu Lake,  Louisiana |  United States |
| Rabbit | Georgian Bay,  Ontario |  Canada |
| Rabbit | Mississippi River,  Mississippi | United States |
| Racoon | Louisiana | United States |
| Ragged | Lake Winnipesaukee,  New Hampshire | United States |
| Ragged |  Nunavut | Canada |
| Rakino | Hauraki Gulf | New Zealand |
| Raiatea | Windward Islands, Society Islands,  French Polynesia |  Overseas Lands of France |
| Rainsford | Boston Harbor,  Massachusetts | United States |
| Raippaluoto | Ostrobothnia |  Finland |
| Rakahanga | Cook Islands |  Cook Islands |
| Ram Island | Stonington, Connecticut | United States |
| Rambutyo | Admiralty Islands |  Papua New Guinea |
| Ramea |  Newfoundland and Labrador | Canada |
| Ramree | |  Myanmar |
| Ramshead | Lake Mead,  Nevada | United States |
| Randall's | East River,  New York | United States |
| Randolph | Grand Bay,  New Brunswick | Canada |
| Random | Newfoundland and Labrador | Canada |
| Rangiroa | Palliser Islands,  Tuamotus, French Polynesia | France |
| Rangitata | Rangitata River | New Zealand |
| Rangitoto | Hauraki Gulf | New Zealand |
| Raoul | Kermadec Islands | New Zealand |
| Raroia | Tuamotus, French Polynesia | France |
| Rarotonga | Cook Islands | Cook Islands |
| Raspberry | Mississippi River,  Minnesota | United States |
| Raspberry | Kodiak Archipelago,  Alaska | United States |
| Rat | Rat Islands group of the Aleutian Islands, Alaska | United States |
| Rat | City Island Harbor, New York | United States |
| Rathlin | Northern Ireland |  United Kingdom |
| Rathlin O'Birne | | Ireland |
| Rato | Estremadura islands |  Portugal |
| Ile aux Rats | Cosmoledo atoll |  Seychelles |
| Rattlesnake | Clear Lake,  California | United States |
| Rattlesnake | Okanagan Lake,  British Columbia | Canada |
| Rattlesnake | Lake Winnipesaukee, New Hampshire | United States |
| Ravenga | Banks Islands |  Vanuatu |
| Île de Ré | Pertuis d'Antioche | France |
| Reao | Tuamotus, French Polynesia | France |
| Rearlaplap | Arno Atoll |  Marshall Islands |
| Rebbenesøy | Karlsøy and Tromsø |  Norway |
| Ile aux Récifs | Inner Islands | Seychelles |
| Reclaimed | Inner Islands | Seychelles |
| Red Rock | San Francisco Bay, California | United States |
| Redbud | Susquehanna River,  Pennsylvania | United States |
| Redhead | Lake Winnipesaukee, New Hampshire | United States |
| Redman Point Bar | Mississippi River,  Arkansas and  Tennessee | United States |
| Redonda | Lesser Antilles |  Antigua and Barbuda |
| Reedy | Delaware River,  Delaware | United States |
| Reichenau | Lake Constance |  Germany |
| Reindeer | Lake Winnipeg,  Manitoba | Canada |
| Reinøya | Karlsøy and Tromsø | Norway |
| Rema | Lake Tana |  Ethiopia |
| Rémire | Amirante Islands | Seychelles |
| Renaissance Island |  Aruba |  Kingdom of the Netherlands |
| René-Levasseur | Manicouagan Reservoir,  Quebec | Canada |
| Rennell | Rennell and Bellona Province, Solomon Islands |  Solomon Islands |
| Rennesøy | Ryfylke Islands, Rogaland | Norway |
| Residence | St. Joseph's Atoll | Seychelles |
| Resolution | Nunavut | Canada |
| Resolution | | New Zealand |
| Resource Island | St. Joseph's Atoll | Seychelles |
| Revillagigedo | Alexander Archipelago, Alaska | United States |
| Rharbi | Kerkenna Islands |  Tunisia |
| Rhineia | Cyclades |  Greece |
| Rhodes | Dodecanese | Greece |
| Rice | Lost Lake, Louisiana | United States |
| Rikers | Upper East River, New York | United States |
| Rincah | |  Indonesia |
| Ringvassøy | Karlsøy and Tromsø | Norway |
| Ripapa | Lyttelton Harbour | New Zealand |
| Roaninish | County Donegal | Ireland |
| Roanoke | Outer Banks,  North Carolina | United States |
| Roastbeef | |  Namibia |
| Robben | Table Bay |  South Africa |
| Robert | South Shetland Islands | Claimed by:
Argentine Antarctica,  Argentina,
 Antártica Chilena Province of  Chile, and
 British Antarctic Territory of the United Kingdom |
| Isla Robertson | South Orkney Islands | Claimed by the: United Kingdom as part of the  Falkland Islands and by
Argentina |
| Robertson | Cumberland River, Tennessee | United States |
| Robertson | Tygart Valley River,  West Virginia | United States |
| Robins | Peconic Bay, New York | United States |
| Robinson Crusoe | Juan Fernández Islands | Chile |
| Roche Babri | Inner Islands | Seychelles |
| Roche Bouquet | Inner Islands | Seychelles |
| Roche Canon | Inner Islands | Seychelles |
| Roche Du Sud | Inner Islands | Seychelles |
| Roche Grande Maman | Inner Islands | Seychelles |
| Roche Tortue | Inner Islands | Seychelles |
| Rocher Des Oiseaux | |  Mauritius |
| Ile Roches | | Mauritius |
| Rock | Willamette River,  Oregon | United States |
| Rock | Green Bay,  Wisconsin | United States |
| Rockabill | | Ireland |
| Rockall | North Atlantic | United Kingdom |
| Roderick | British Columbia | Canada |
| Roi-Namur | Kwajalein Atoll, Ralik Chain | Marshall Islands |
| Ilhéu das Rólas | Gulf of Guinea |  São Tomé and Príncipe |
| Rolvsøya | | |
| Rømø | North Sea |  Denmark |
| Romsø | Great Belt | Denmark |
| Ronde | |  Grenada |
| Île Ronde | | Mauritius |
| Île Ronde | Amqui, Quebec | Canada |
| Île Ronde | Beauceville, Quebec | Canada |
| Île Ronde (Île du Docteur) | Beauharnois, Quebec | Canada |
| Île Ronde | roadstead of Brest, .svg.png) Brittany | France |
| Île Ronde | Contrecœur, Quebec | Canada |
| Île Ronde | Dundee, Quebec | Canada |
| Île Ronde | Grand-Remous, Quebec | Canada |
| Île Ronde | Gros-Mécatina, Quebec | Canada |
| Île de la Ronde (Île Tekakwitha) | Kahnawake, Quebec | Canada |
| Île Ronde | La Pêche, Quebec | Canada |
| Île Ronde | La Tuque, Quebec | Canada |
| Île Ronde | Lac-Casault, Quebec | Canada |
| Île Ronde | Lac-Tremblant-Nord, Quebec | Canada |
| Île Ronde | Léry, Quebec | Canada |
| Île Ronde | L′Isle-Verte, Quebec | Canada |
| Île Ronde | Mont-Laurier, Quebec | Canada |
| Île Ronde | Mont-Saint-Michel, Quebec | Canada |
| Île Ronde | Notre-Dame-de-Pontmain, Quebec | Canada |
| Île Ronde | Potton, Quebec | Canada |
| Île Ronde | Preissac, Quebec | Canada |
| Île Ronde | Rimouski, Quebec | Canada |
| Île Ronde (Île Brûlée) | Rimouski, Quebec | Canada |
| Île Ronde | Îles Laval, Rivière des Prairies, Quebec | Canada |
| Île Ronde | Rouyn-Noranda, Quebec | Canada |
| Île Ronde | Saint-Antoine-de-l′Isle-aux-Grues, Quebec | Canada |
| Île Ronde | Saint-Boniface, Quebec | Canada |
| Île Ronde | Saint-François-du-Lac, Quebec | Canada |
| Île Ronde | Saint-Henri-de-Taillon, Quebec | Canada |
| Île Ronde | Saint-Hippolyte, Quebec | Canada |
| Île Ronde | Saint-Ignace-de-Loyola, Quebec | Canada |
| Île Ronde | Saint-Lucien, Quebec | Canada |
| Île Ronde | Saint-Paul-de-l′Île-aux-Noix, Quebec | Canada |
| Île Ronde | Saint-Roch-de-Mékinac, Quebec | Canada |
| Île Ronde | Saint-Sulpice, Quebec | Canada |
| Île Ronde | Sainte-Thérèse-de-la-Gatineau, Quebec | Canada |
| Île Ronde | Senneterre, Quebec | Canada |
| Île Ronde | Inner Islands | Seychelles |
| Île Ronde (Île Chapdelaine) | Shawinigan, Quebec | Canada |
| Île Ronde | Val-Brillant, Quebec | Canada |
| Île Ronde | Vaudreuil-Dorion, Quebec | Canada |
| Île Ronde (Île Bray) | Vaudreuil-Dorion, Quebec | Canada |
| Rondeau | Ohio River,  Kentucky | United States |
| Rongelap Atoll | Ralik Chain | Marshall Islands |
| Rongerik Atoll | Kwajalein Atoll, Ralik Chain | Marshall Islands |
| Roosevelt | East River, New York | United States |
| Rose | Georgian Bay, Ontario | Canada |
| Ross | | Antarctica |
| Ross | Willamette River, Oregon | United States |
| Ross | Allegheny River, Pennsylvania | United States |
| Rosscor | Lower Lough Erne | Ireland |
| Røst | Lofoten | Norway |
| Rostam | Persian Gulf |  Iran |
| R. Thompson's | Allegheny River, Pennsylvania | United States |
| Rotoroa | Hauraki Gulf | New Zealand |
| Rottumeroog | Eemsmond,  Groningen | Netherlands |
| Rottumerplaat | Eemsmond, Groningen | Netherlands |
| Rotuma | |  Fiji |
| Rough | Lower Lough Erne | Ireland |
| Rough | Solway Firth |  Scotland |
| Round | Krenitzin Islands subgroup of the Fox Islands group of the Aleutian Islands, Alaska | United States |
| Round | Coast Land District, British Columbia | Canada |
| Round | Lillooet Land District, British Columbia | Canada |
| Round | Nanaimo Land District, British Columbia | Canada |
| Round | Rupert Land District, British Columbia, Canada |
| Round | Dorset | United Kingdom |
| Round (Pak Sha Chau, 白沙洲) | North District,  Hong Kong |  China |
| Round (Ngan Chau, 銀洲) | Southern District, Hong Kong | China |
| Round | Manitoba | Canada |
| Round (a.k.a. Bumpkin) | Massachusetts | United States |
| Round |  Maryland | United States |
| Round | Straits of Mackinac,  Michigan | United States |
| Round | Detroit River, Michigan | United States |
| Round | Mississippi Sound, Mississippi | United States |
| Round | New Brunswick | Canada |
| Round | Lake Winnipesaukee, New Hampshire | United States |
| Round | Newfoundland and Labrador | Canada |
| Round |  Nova Scotia | Canada |
| Round | Coutts Inlet, Baffin Bay, Nunavut | Canada |
| Round | Cross Bay, Chesterfield Inlet, Nunavut | Canada |
| Round | Buckeye Lake, Fairfield County,  Ohio | United States |
| Round | Algoma, Ontario | Canada |
| Round | Frontenac, Ontario | Canada |
| Round | Kenora, Ontario | Canada |
| Round | Lanark, Ontario | Canada |
| Round | Leeds, Ontario | Canada |
| Round | Lennox and Addington, Ontario | Canada |
| Round | Parry Sound, Ontario | Canada |
| Round | Sudbury, Ontario | Canada |
| Round | Thunder Bay, Ontario | Canada |
| Round | Frankland Islands,  Queensland |  Australia |
| Round | Hogan Group, northern Bass Strait,  Tasmania | Australia |
| Round Bottle | Newfoundland and Labrador | Canada |
| Round Head | Newfoundland and Labrador | Canada |
| Round Rocks | Nunavut | Canada |
| Round Shag | Newfoundland and Labrador | Canada |
| Round Wolf | Newfoundland and Labrador | Canada |
| Rousay | The North Isles,  Orkney Islands | Scotland |
| Rowa | Banks Islands | Vanuatu |
| Rowett | South Shetland Islands | Claimed by Argentine Antarctica, Argentina, Antártica Chilena Province of Chile, and British Antarctic Territory of the United Kingdom |
| Rowley | Queen Elizabeth Islands, Nunavut | Canada |
| Isle Royale | Lake Superior, Michigan | United States |
| Rozenburg |  South Holland | Netherlands |
| Ruapuke | | New Zealand |
| Rubud Al Gharbiyah | Hawar Islands |  Bahrain |
| Rubud Al Sharqiyah | Hawar Islands | Bahrain |
| Ruden |  Mecklenburg-Vorpommern | Germany |
| ostrov Rudolfa | Franz Josef Land |  Russia |
| Rügen | Mecklenburg-Vorpommern | Germany |
| Rugged | South Shetland Islands | Claimed by Argentine Antarctica, Argentina, Antártica Chilena Province of Chile, and British Antarctic Territory of the United Kingdom |
| Ruhnu | Gulf of Riga |  Estonia |
| Rùm | Small Isles of the Inner Hebrides | Scotland |
| Rush | Mississippi River,  Iowa | United States |
| Rusk Holm | The North Isles, Orkney Islands | Scotland |
| Russell | Lake Huron Ontario | Canada |
| Russel | Nunavut | Canada |
| Russel | St. Clair River, Michigan | United States |
| Russell | Frankland Group National Park, Queensland | Australia |
| Russell | Southern Moreton Bay Islands, Queensland | Australia |
| Rysa Little | The South Isles, Orkney Islands | Scotland |