| Island | Country or location | Eponym | | Ackerman Island | United States}} United States | Joseph Ackerman |
| Agios Efstratios | Greece}} Greece | Saint Eustratius (Όσιος Ευστράτιος ο Θαυματουργός), who lived on the island in the 9th century as an exile, because he was opposed to the iconoclastic policies of the Byzantine Emperor Leo the Armenian |
| Agios Georgios | Greece}} Greece | Saint George |
| Alejandro Selkirk Island | Chile}} Chile | Alexander Selkirk |
| Alexander Island | Antarctica}} Antarctica | Alexander I of Russia |
| Allen Island | Australia}} Australia | John Allen |
| Amherst Island | Canada}} Canada | Jeffery Amherst, 1st Baron Amherst |
| Amherst Island | Canada}} Canada | Jeffery Amherst, 1st Baron Amherst |
| Amund Ringnes Island | Canada}} Canada | Amund Ringnes |
| Annenkov Island | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | Mikhail Annenkov |
| Annette Island | United States}} United States | Annette Whitney Dall |
| Axel Heiberg Island | Canada}} Canada | Axel Heiberg |
| Baffin Island | Canada}} Canada | William Baffin |
| Bainbridge Island | United States}} United States | Commodore William Bainbridge |
| Baker Island | United States}} United States | Captain Michael Baker |
| Ball's Pyramid | Australia}} Australia | Lieutenant Henry Ball |
| Banks Island | Canada}} Canada | Joseph Banks |
| Baranof Island | United States}} United States | Alexander Andreyevich Baranov |
| Barrow Island | Australia}} Australia | Sir John Barrow, 1st Baronet |
| Bartolomé Island | Ecuador}} Ecuador | Sir Bartholomew James Sulivan |
| Bathurst Island | Australia}} Australia | Henry Bathurst, 3rd Earl Bathurst |
| Bathurst Island | Canada}} Canada | Henry Bathurst, 3rd Earl Bathurst |
| Beauchene Island | Falkland Islands}} Falkland islands | Jacques Gouin de Beauchêne |
| Bedford Island | Antarctica}} Antarctica | Thomas Bedford |
| Belcher Islands | Canada}} Canada | Edward Belcher |
| Bellingshausen Island | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | Fabian von Bellingshausen |
| Bentinck Island | Canada}} Canada | Lord George Bentinck (possibly) |
| Bering Island | Russia}} Russia | Vitus Bering |
| Berkner Island | Antarctica}} Antarctica | Lloyd Berkner |
| Bermuda | Bermuda}} Bermuda | Juan de Bermúdez |
| Bernard Island | Antarctica}} Antarctica | Claude Bernard |
| Bernier Island | Australia}} Australia | Pierre-François Bernier (presumably) |
| Bismarck Archipelago | Papua New Guinea}} Papua New Guinea | Otto von Bismarck |
| Bjarnason Island | Canada}} Canada | Matt Bjarnason |
| Blakely Island | United States}} United States | Johnston Blakeley |
| Block Island | United States}} United States | Adriaen Block |
| Borden Island, Northwest Territories/Nunavut | Canada}} Canada | Robert Borden |
| Bougainville | Papua New Guinea}} Papua New Guinea | Louis Antoine de Bougainville |
| Boularderie Island | Canada}} Canada | Louis-Simon le Poupet de la Boularderie |
| Bouvet Island | Norway}} Norway | Jean-Baptiste Charles Bouvet de Lozier |
| Bowen Island, British Columbia | Canada}} Canada | James Bowen (Royal Navy officer) |
| Bowen Island (Jervis Bay) | Australia}} Australia | Richard Bowen RN |
| Bowyer Island, British Columbia | Canada}} Canada | Sir George Bowyer, 5th Baronet |
| Brenton Island | South Africa}} South Africa | Jahleel Brenton |
| Bristol Island | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | Augustus Hervey, 3rd Earl of Bristol |
| Brock Island, Northwest Territories | Canada}} Canada | Reginald W. Brock |
| Brown Island, Northwest Territories | United States}} United States | John G. Brown |
| Bruny Island | Australia}} Australia | Bruni d'Entrecasteaux |
| Burnaby Island | Canada}} Canada | Robert Burnaby |
| Busta Rhymes Island | United States}} United States | Busta Rhymes |
| Bylot Island | Canada}} Canada | Robert Bylot |
| Camano Island | United States}} United States | Jacinto Caamaño |
| Campobello Island | Canada}} Canada | Lord William Campbell (with name Italianized) |
| Cape Chidley Islands | Canada}} Canada | John Chidley |
| Charles Alexander Island | Russia}} Russia | Charles Alexander |
| Charles Island | United States}} United States | Charles Deal |
| Charlton Island | Canada}} Canada | Charles I of England |
| Charron Island | Canada}} Canada | François Charron |
| Cheeseman Island | New Zealand}} New Zealand | Thomas Frederick Cheeseman |
| Chichagof Island | United States}} United States | Vasili Chichagov |
| Chirikof Island | United States}} United States | Alexei Chirikov |
| Choiseul Island | Solomon Islands}} Solomon Islands | Étienne François, duc de Choiseul |
| Churchill Island | Australia}} Australia | John Churchill |
| Clapperton Island | Canada}} Canada | Hugh Clapperton |
| Clark Island | Australia}} Australia | Lieutenant Ralph Clark |
| Clark Island | United States}} United States | Midshipman John Clark |
| Clarke Island | Australia}} Australia | William Clarke |
| Clerke Rocks | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | Charles Clerke |
| Coats Island | Canada}} Canada | William Coats |
| Cockburn Island | Canada}} Canada | Francis Cockburn |
| Colville Island | United States}} United States | Andrew Colville |
| Cook Islands | Cook Islands}} Cook Islands | James Cook |
| Cook Island | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | James Cook |
| Cooper Island | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | Robert Palliser Cooper |
| Cornwallis Island | Canada}} Canada | William Cornwallis |
| Cortes Island, British Columbia | Canada}} Canada | Hernán Cortés |
| Crown Prince Frederik Island | Canada}} Canada |
| Crozier Island | Greenland}} Greenland | Francis Crozier |
| Curtis Island | Australia}} Australia | Roger Curtis |
| Dall Island | United States}} United States | William Healey Dall |
| Darwin Island | Ecuador}} Ecuador | Charles Darwin |
| Davaar Island | Scotland}} Scotland | Saint Barr |
| Dawson Island | Chile}} Chile | See Dawson (surname) |
| Decatur Island | United States}} United States | Stephen Decatur |
| Delarof Islands | United States}} United States | Evstratii Ivanovich Delarov |
| D'Entrecasteaux Islands | Papua New Guinea}} Papua New Guinea | Bruni D'Entrecasteaux |
| Diego Garcia | British Indian Ocean Territory}} British Indian Ocean Territory | Diego García de Moguer |
| Diego Ramírez Islands | Chile}} Chile | Diego Ramírez |
| Digges Islands | Canada}} Canada | Dudley Digges |
| Diomede Islands | United States}} United States {{flagicon|Russia}} Russia | Saint Diomedes |
| Dirk Hartog Island | Australia}} Australia | Dirk Hartog |
| Dorre Island | Australia}} Australia | Peter Dorre |
| Douglas Island | United States}} United States | John Douglas |
| Douglas Island | Canada}} Canada | James Douglas (presumably) |
| D'Oyly Carte Island | England}} England | Richard D'Oyly Carte |
| Doumer Island | Antarctica}} Antarctica | Paul Doumer |
| Drake's Island | England}} England | Francis Drake |
| Drummond Island | United States}} United States | Gordon Drummond |
| Dundas Island | Canada}} Canada | Henry Dundas, 1st Viscount Melville |
| Dundas Island | Canada}} Canada | Henry Dundas, 1st Viscount Melville |
| D'Urville Island | New Zealand}} New Zealand | Jules Dumont d'Urville |
| Edgell Island | Canada}} Canada | Captain Edgell |
| Edgeøya | Norway}} Norway | Thomas Edge |
| Eilean Chaluim Chille | Scotland}} Scotland | Saint Columba |
| Eilean Donan | Scotland}} Scotland | Saint Donan |
| Ellef Ringnes Island | Canada}} Canada | Ellef Ringnes |
| Ellesmere Island | Canada}} Canada | Francis Egerton, 1st Earl of Ellesmere |
| Ellis Island | United States}} United States | Samuel Ellis (colonial New Yorker) |
| Ernst Thälmann Island | Cuba}} Cuba | Ernst Thälmann |
| Faure Island | Australia}} Australia | Pierre Faure |
| Fergusson Island | Papua New Guinea}} Papua New Guinea | Sir James Fergusson, 6th Baronet |
| Fernandina Island | Ecuador}} Ecuador | Ferdinand II of Aragon |
| Fernando de Noronha | Brazil}} Brazil | Fernão de Loronha |
| Fisher Island | United States}} United States | Carl G. Fisher |
| Flaherty Island | Canada}} Canada | Robert J. Flaherty |
| Flinders Island | Australia}} Australia | Matthew Flinders |
| Floreana Island | Ecuador}} Ecuador | Juan José Flores |
| Fort Denison | Australia}} Australia | William Denison |
| Fox Island | United States}} United States | J.L. Fox |
| Franklin Island | Antarctica}} Antarctica | Sir John Franklin |
| Franklin Island | Greenland}} Greenland | Sir John Franklin |
| Franz Josef Land | Russia}} Russia | Franz Joseph I |
| Fraser Island | Australia}} Australia | Eliza Fraser |
| Fraser Island | Canada}} Canada | Robert James Fraser |
| Freeman Island | United States}} United States | J.D. Freeman |
| Frobisher's Farthest | Canada}} Canada | Martin Frobisher |
| Frost Island | United States}} United States | Boatswain John Frost |
| Galiano Island, British Columbia | Canada}} Canada | Dionisio Alcalá Galiano |
| Gambier Island, British Columbia | Canada}} Canada | James Gambier, 1st Baron Gambier |
| Gambier Islands | French Polynesia}} French Polynesia | James Gambier, 1st Baron Gambier |
| Geiger Key | United States}} United States | Henry Huling Geiger |
| Graham Island | Canada}} Canada | Sir James Graham, 2nd Baronet |
| Graham Bell Island | Russia}} Russia | Alexander Graham Bell |
| Gravina Island | United States}} United States | Federico Carlos Gravina y Nápoli |
| Gravina Islands | United States}} United States | Federico Carlos Gravina y Nápoli |
| Gribbell Island | Canada}} Canada | Rev. Francis Barrow Gribbell |
| Grindal Island | Australia}} Australia | Thomas Grindall |
| Guemes Island | United States}} United States | Juan Vicente de Güemes, 2nd Count of Revillagigedo |
| Guss Island | United States}} United States | Guss Hoffmaster |
| Guy Fawkes Island | Ecuador}} Ecuador | Guy Fawkes |
| Hall Island | Russia}} Russia | Charles Francis Hall |
| Hannah Island | Greenland}} Greenland | Hannah (Tookoolito) |
| Hans Island | Canada}} Canada or {{flagicon|Greenland}} Greenland | Hans Hendrik |
| Hantzsch Island | Canada}} Canada | Bernhard Hantzsch |
| Harstine Island | United States}} United States | Lt. Henry J. Hartstene |
| Havelock Island | India}} India | Henry Havelock |
| Hawkesbury Island | Canada}} Canada | Charles Jenkinson, 1st Earl of Liverpool (Lord Hawkesbury) |
| Heard Island and McDonald Islands | Australia}} Australia | William Heard and John McDonald |
| Hearst Island | Antarctica}} Antarctica | William Randolph Hearst |
| Henderson Island | Pitcairn Islands}} Pitcairn Islands | Captain Henderson EIC |
| Hendrik Island | Greenland}} Greenland | Hendrik Olsen |
| Henry Island | United States}} United States | Henry Wilkes |
| Henry Lawrence Island | India}} India | Henry Montgomery Lawrence |
| Herron Island | United States}} United States | Lewis Herron |
| Hooker Island | Russia}} Russia | Joseph Dalton Hooker |
| Hopkins Island | Australia}} Australia | John Hopkins |
| Hormuz Island | Iran}}Iran | Hormizd I |
| Hornby Island, British Columbia | Canada}} Canada | Geoffrey Hornby |
| Howe Island, Ontario | Canada}} Canada | William Howe, 5th Viscount Howe |
| Hutt Island, British Columbia | Canada}} Canada | John Hutt (Royal Navy officer) |
| Île Bizard, Quebec | Canada}} Canada | Jacques Bizard |
| Île d'Orléans, Quebec | Canada}} Canada | Henri II, Duke of Orléans |
| Île Jésus, Quebec | Canada}} Canada | Jesus |
| Île Perrot | Canada}} Canada | François-Marie Perrot |
| Île Saint-Louis | France}} France | Louis IX of France |
| Îles Laval | Canada}} Canada | François de Laval |
| Inchcolm | Scotland}} Scotland | Saint Columba |
| Inch Kenneth | Scotland}} Scotland | Saint Kenneth |
| Inchmarnock | Scotland}} Scotland | Saint Mearnag |
| Inchmurrin | Scotland}} Scotland | Saint Meadhran/Mirren |
| Innis Chonan | Scotland}} Scotland | Saint Conan |
| Isabela Island | Ecuador}} Ecuador | Isabella I of Spain |
| Island of Mozambique | Mozambique}} Mozambique | Mussa Bin Bique |
| Isle La Motte | United States}} United States | Pierre La Motte |
| Isle Martin | Scotland}} Scotland | Saint Martin |
| Jackson Island | Russia}} Russia | Frederick George Jackson |
| Jahleel Island | South Africa}} South Africa | Jahleel Brenton |
| James Island | United States}} United States | Reuben James |
| James Ross Island | Antarctica}} Antarctica | James Clark Ross |
| Jan Mayen Island | Norway}} Norway | Jan Jacobs May van Schellinkhout |
| Jens Munk Island | Canada}} Canada | Jens Munk |
| Joe Island | Greenland}} Greenland | Joe (Ipiirvik or Ebierbing) |
| John Lawrence Island | India}} India | John Lawrence, 1st Baron Lawrence |
| Johnston Atoll | United States}} United States | Captain Charles J. Johnston |
| Jones Island | United States}} United States | Jacob Jones |
| Jorge Montt Island | Chile}} Chile | Jorge Montt |
| Juan Fernández Islands | Chile}} Chile | Juan Fernández (explorer) |
| Keats Island (British Columbia) | Canada}} Canada | Richard Goodwin Keats |
| Kennedy Island | Solomon Islands}} Solomon Islands | John F. Kennedy |
| Keppel Island | Falkland Islands}} Falkland Islands | Admiral Augustus Keppel |
| Kerguelen | French Southern and Antarctic Lands}} French Southern and Antarctic Lands | Yves-Joseph de Kerguelen de Trémarec |
| Kermadec Islands | New Zealand}} New Zealand | Jean-Michel Huon de Kermadec |
| Ketron Island | United States}} United States | William Kittson (name badly misspelt by cartographers) |
| Kilian Island | Canada}} Canada | Bernhard Kilian |
| King George Island | Antarctica}} Antarctica | George III of the United Kingdom |
| King George Islands | Canada}} Canada | George III of the United Kingdom |
| King George Islands | French Polynesia}} French Polynesia | George III of the United Kingdom |
| King Island | Australia}} Australia | Philip Gidley King |
| King William Island | Canada}} Canada | William IV of the United Kingdom |
| Kirkland Island | Canada}} Canada | John Kirkland |
| Korovin Island | United States}} United States | Ivan Korovin (presumably) |
| Kupreanof Island | United States}} United States | Ivan Antonovich Kupreianov |
| Kupriyanov Islands | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | Ivan Kupriyanov |
| Lady Franklin Island | Canada}} Canada | Lady Jane Franklin |
| Lady Julia Percy Island | Australia}} Australia | Lady Julia Helen Percy |
| Lanzarote | Spain}} Spain | Lancelotto Malocello |
| Lemesurier Island | United States}} United States | Midshipman William Le Mesurier |
| Lennox Island | Canada}} Canada | Charles Lennox, 4th Duke of Richmond |
| Lewis Island | Australia}} Australia | George Lewis |
| Little Island | Australia}} Australia | John Little |
| Little Wellington Island | Chile}} Chile | Arthur Wellesley, 1st Duke of Wellington |
| Loks Land Island | Canada}} Canada | Michael Lok |
| Lockwood Ø | Greenland}} Greenland | James Booth Lockwood |
| Lopez Island | United States}} United States | Gonzalo López de Haro |
| Lord Howe Island | Australia}} Australia | Richard Howe, 1st Earl Howe |
| Louise Island | Canada}} Canada | Princess Louise, Duchess of Argyll |
| Lulu Island | Canada}} Canada | Lulu Sweet |
| Macauley Island | New Zealand}} New Zealand | George Mackenzie Macaulay |
| MacDonald Island | Canada}} Canada | James F. MacDonald |
| Mackenzie King Island | Canada}} Canada | William Lyon Mackenzie King |
| MacKlintok Island | Russia}} Russia | Francis Leopold McClintock |
| Macquarie Island | Australia}} Australia | Lachlan Macquarie |
| Magdalen Islands | Canada}} Canada | Madeleine Fontaine, seigneur François Doublet's wife |
| Malcolm Island | Canada}} Canada | Pulteney Malcolm |
| Manoel Island | Malta}} Malta | António Manoel de Vilhena |
| Mansel Island | Canada}} Canada | Robert Mansell |
| Manuel Rodriguez Island | Chile}} Chile | Manuel Rodríguez Erdoíza |
| Marchena Island | Ecuador}} Ecuador | Frey Antonio de Marchena |
| Margaret Island | Hungary}} Hungary | Saint Margaret of Hungary |
| Mauritius | Mauritius}} Indian Ocean | Maurice of Nassau |
| Mayne Island | Canada}} Canada | Richard Mayne |
| McIntyre Island | Antarctica}} Antarctica | Robert McIntyre, USN |
| McNeil Island | United States}} United States | William Henry McNeill |
| McNish Island | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | Harry McNish |
| Melville Island | Australia}} Australia | Robert Dundas, 2nd Viscount Melville |
| Melville Island | Canada}} Canada | Robert Dundas, 2nd Viscount Melville |
| Milne Land | Greenland}} Greenland | David Milne |
| Mitkof Island | United States}} United States | Admiral Prokofy Mitkov |
| Money Island | China}} China (claimed by Taiwan and Vietnam) | William Taylor Money |
| Montagu Island | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | John Montagu, 4th Earl of Sandwich |
| Moresby Island | Canada}} Canada | Fairfax Moresby |
| Moresby Island | Canada}} Canada | Fairfax Moresby |
| Moreton Island | Australia}} Australia | James Douglas, 14th Earl of Morton |
| Mornington Island | Australia}} Australia | Richard Wellesley, 1st Marquess Wellesley (also Earl of Mornington) |
| Moore Island | Canada}} Canada | Elwood S. Moore |
| Mudge Island | Canada}} Canada | William Fitzwilliam Mudge |
| Nansen Island | Antarctica}} Antarctica | Fridtjof Nansen |
| Nansen Island | Russia}} Russia | Fridtjof Nansen |
| Necker Island | British Virgin Islands}} British Virgin Islands | Johannes de Neckere |
| Necker Island | United States}} United States | Jacques Necker |
| Neil Island | India}} India | James George Smith Neill |
| Nicholson Island | India}} India | R.T. Nicholson |
| Normanby Island | Papua New Guinea}} Papua New Guinea | George Phipps, 2nd Marquess of Normanby |
| North Rona | Scotland}} Scotland | Saint Ronan |
| North Seymour Island | Ecuador}} Ecuador | Lord Hugh Seymour |
| North Tweedsmuir Island | Canada}} Canada | John Buchan, 1st Baron Tweedsmuir |
| Ogasawara Islands | Japan}} Japan | Ogasawara Sadayori |
| Orcas Island | United States}} United States | Juan Vicente de Güemes, 2nd Count of Revillagigedo, whose full name included the name Horcasitas |
| Ostrovul Sfintu Gheorghe | Romania}} Romania | Saint George |
| Palmerston Island | Cook Islands}} Cook Islands | Henry Temple, 2nd Viscount Palmerston |
| Parker Island | Canada}} Canada | Lieutenant George Ferdinand Hastings Parker |
| Pavlof Islands | United States}} United States | Pitka Pavlof |
| Pearse Island | Canada}} Canada | William Alfred Rombulow Pearse, RN |
| Pender Island | Canada}} Canada | Daniel Pender |
| Peter Island | British Virgin Islands}} British Virgin Islands | Pieter Adriensen |
| Peter I Island | Antarctica}} Antarctica (claimed by Norway) | Peter I of Russia |
| Phillip Island | Australia}} Australia | Arthur Phillip |
| Pickersgill Islands | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | Richard Pickersgill |
| Picton | Chile}} Chile | Thomas Picton |
| Pitt Island | New Zealand}} New Zealand | William Pitt, 1st Earl of Chatham |
| Porcher Island | Canada}} Canada | Edwin Augustus Porcher |
| Pribilof Islands | United States}} United States | Gavriil Pribilof |
| Prince Leopold Island | Canada}} Canada | Prince Leopold of Saxe-Coburg-Saalfeld |
| Prince of Wales Island (Alaska) | United States}} United States | George Augustus Frederick, Prince of Wales |
| Prince of Wales Island (Nunavut), | Canada}} Canada | Albert Edward, Prince of Wales |
| Prince of Wales Island (Queensland) | Australia}} Australia | George Augustus Frederick, Prince of Wales |
| Prince Charles Island | Canada}} Canada | Charles, Prince of Wales |
| Prince Edward Island | Canada}} Canada | Prince Edward Augustus, Duke of Kent and Strathearn, father of Queen Victoria |
| Prince Patrick Island | Canada}} Canada | Prince Arthur William Patrick, Duke of Connaught and Strathearn |
| Prinsesse Dagmar Island | Greenland}} Greenland | Princess Dagmar of Denmark |
| Príncipe Island | São Tomé and Príncipe}} São Tomé and Príncipe | Afonso, Prince of Portugal |
| Quadra Island, British Columbia | Canada}} Canada | Juan Francisco de la Bodega y Quadra |
| Queen Adelaide Archipelago | Chile}} Chile | Adelaide of Saxe-Meiningen |
| Queen Elizabeth Islands | Canada}} Canada | Queen Elizabeth II |
| René-Levasseur Island | Canada}} Canada | René Levasseur |
| Revillagigedo Island | United States}} United States | Juan Vicente de Güemes, 2nd Count of Revillagigedo |
| Revillagigedo Islands | Mexico}} Mexico | Juan Vicente de Güemes, 2nd Count of Revillagigedo |
| Rikers Island | United States}} United States | Abraham Rycken (Dutch settler) |
| Robinson Island | Chile}} Chile | Robinson Crusoe (fictional character) |
| Robinson Island | Hong Kong}} Hong Kong | Sir Hercules Robinson, former Governor of Hong Kong |
| Rob Roy Island | Solomon Islands}} Solomon Islands | Rob Roy MacGregor |
| Roderick Island | Canada}} Canada | Roderick Finlayson |
| Roosevelt Island | Antarctica}} Antarctica | Franklin D. Roosevelt |
| Roosevelt Island | United States}} United States | Franklin D. Roosevelt |
| Ross Island | Antarctica}} Antarctica | James Clark Ross |
| Rothschild Island | Antarctica}} Antarctica | Édouard Alphonse de Rothschild |
| Rudolf Island | Russia}} Russia | Rudolf, Crown Prince of Austria |
| Sabine Island | Greenland}} Greenland | Edward Sabine |
| Saint Barthélemy | France}} France | Bartholomew Columbus |
| St Catherine's Island | Wales}} Wales | Catherine of Alexandria |
| Saint Helena | Saint Helena, Ascension and Tristan da Cunha}} Saint Helena, Ascension and Tristan da Cunha | Helena of Constantinople |
| St Ignace Island | Canada}} Canada | Ignatius of Loyola |
| Saint John | United States Virgin Islands}} United States Virgin Islands | John the Apostle |
| Saint Kitts | Saint Kitts and Nevis}} Saint Kitts and Nevis | Saint Christopher |
| St. Lawrence Island, Alaska | United States}} United States | Lawrence of Rome |
| Saint Lucia | Saint Lucia}} Caribbean Sea | Saint Lucy |
| Saint Martin | France}} France
{{flagicon|Sint Maarten}} Sint Maarten | Martin of Tours |
| St Martin's | England}} England | Martin of Tours |
| St Mary's | England}} England | Saint Mary |
| St Michael's Isle | Isle of Man}} Isle of Man | Saint Michael |
| St Ninian's Isle | Scotland}} Scotland | Saint Ninian |
| St Patrick's Isle | Isle of Man}} Isle of Man | Saint Patrick |
| St Paul's Island | Malta}} Malta | Saint Paul of Tarsus |
| Saint Pierre Island | France}} France | Saint Peter |
| St Serf's Inch | Scotland}} Scotland | Saint Serf |
| Saint Tudwal's Islands | Wales}} Wales | Tudwal |
| Saint Vincent | Saint Vincent and the Grenadines}} Saint Vincent and the Grenadines | Vincent of Saragossa |
| Salisbury Island | Russia}} Russia | Rollin D. Salisbury |
| San Andrés Island | Colombia}} Colombia | Saint Andrew |
| San Clemente Island, California | United States}} United States | Saint Clement |
| San Cristóbal Island | Ecuador}} Ecuador | Saint Christopher |
| San Domino | Italy}} Italy | Saint Domnius |
| San Juan Island, Washington | United States}} United States | Juan Vicente de Güemes, 2nd Count of Revillagigedo |
| San Juan Islands, Washington | United States}} United States | Juan Vicente de Güemes, 2nd Count of Revillagigedo |
| San Niccolò | Italy}} Italy | Saint Nicholas |
| San Nicolas Island, California | United States}} United States | Saint Nicholas |
| San Pietro Island | Italy}} Italy | Saint Peter |
| Santa Catalina Island, California | United States}} United States | Catherine of Alexandria |
| Santa Isabel Island | Solomon Islands}} Solomon Islands | Saint Elizabeth |
| Santa Luzia | Cape Verde}} Cape Verde | Saint Lucy |
| Santa Maria Island | Portugal}} Portugal | Saint Mary |
| Sant'Antioco | Italy}} Italy | Saint Antiochus |
| Santiago Island | Cape Verde}} Cape Verde | Saint James |
| Santo Antão Island | Cape Verde}} Cape Verde | Saint Anthony |
| Santorini | Greece}} Greece | Saint Irene |
| São Jorge Island | Portugal}} Portugal | Saint George |
| São Miguel Island | Portugal}} Portugal | Saint Michael |
| São Nicolau Island | Cape Verde}} Cape Verde | Saint Nicholas |
| São Tomé Island | São Tomé and Príncipe}} São Tomé and Príncipe | Saint Thomas |
| São Vicente Island | Cape Verde}} Cape Verde | Vincent of Saragossa |
| Saunders Island, South Sandwich Islands | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | Charles Saunders (Royal Navy officer) |
| Saunders Island, Greenland | Greenland}} Greenland | James Saunders, RN |
| Schouten Island | Australia}} Australia | Joost Schouten |
| Seychelles | Seychelles}} Indian Ocean | Jean Moreau de Séchelles |
| Shaw Island | United States}} United States | John Shaw |
| Shaw Islands | Antarctica}} Antarctica | John E. Shaw |
| Shumagin Islands | United States}} United States | Nikita Shumagin |
| Sinclair Island (Washington) | United States}} United States | Arthur Sinclair |
| Sint Eustatius | Caribbean Netherlands}} Caribbean Netherlands | Saint Eustace |
| Sir Hugh Rose Island | India}} India | Hugh Rose, 1st Baron Strathnairn |
| Sir William Peel Island | India}} India | Sir William Peel |
| Smith Island | Australia}} Australia | William Smith |
| Smith Island | Antarctica}} Antarctica | William Smith (not same as above) |
| Smith Island | United States}} United States | John Smith |
| Solander Islands | New Zealand}} New Zealand | Daniel Solander |
| Somerville Island | Antarctica}} Antarctica | Crichton Somerville |
| Spieden Island | United States}} United States | Purser William Speiden |
| Søren Norby's Island | Greenland}} Greenland | Søren Norby |
| South Georgia | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | George III of the United Kingdom |
| South Tweedsmuir Island | Canada}} Canada | John Buchan, 1st Baron Tweedsmuir |
| Starbuck Island | Kiribati}} Kiribati | Valentine Starbuck |
| Stefansson Island | Canada}} Canada | Vilhjalmur Stefansson |
| Stewart Island | New Zealand}} New Zealand | William W. Stewart |
| Stretch Island | United States}} United States | Samuel Stretch |
| Stuart Island | United States}} United States | Frederick D. Stuart |
| Sverdrup Islands | Canada}} Canada | Otto Sverdrup |
| Sveti Đorđe | Montenegro}} Montenegro | Saint George |
| Sveti Nikola | Montenegro}} Montenegro | Saint Nicholas |
| Sveti Stefan | Montenegro}} Montenegro | Saint Stephen |
| Sweyn Holm | Scotland}} Scotland | Sweyn Asleifsson |
| Tagg's Island | England}} England | Tom Tagg |
| Tasmania | Australia}} Australia | Abel Tasman |
| Tanner Island | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | William G. Tanner |
| Taylor Island | Australia}} Australia | William Taylor |
| Tennent Islands | Canada}} Canada | James Emerson Tennent |
| Theodore Roosevelt Island | United States}} United States | Theodore Roosevelt |
| Thistle Island | Australia}} Australia | John Thistle |
| Tobias Island (Tuppiap Qeqertaa) | Greenland}} Greenland | Tobias Gabrielsen |
| Townshend Island | Australia}} Australia | Thomas Townshend, 1st Viscount Sydney |
| Traill Island | Greenland}} Greenland | Thomas Stewart Traill |
| Traversay Islands | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | Jean-Baptiste Prevost de Sansac, Marquis de Traversay |
| Tristan da Cunha | Saint Helena, Ascension and Tristan da Cunha}} Saint Helena, Ascension and Tristan da Cunha | Tristão da Cunha |
| U Thant Island | United States}} United States | U Thant |
| Valdes Island | Canada}} Canada | Cayetano Valdés y Flores |
| Vancouver Island | Canada}} Canada | George Vancouver |
| Vashon Island | United States}} United States | James Vashon |
| Vendovi Island | United States}} United States | Ro Veidovi |
| Victoria Island | Canada}} Canada | Queen Victoria |
| Waldron Island | United States}} United States | Richard Russell Waldron or Thomas Westbrook Waldron |
| Wales Island | Canada}} Canada | William Wales |
| Ward Hunt Island | Canada}} Canada | George Ward Hunt |
| Weddell Island | Falkland Islands}} Falkland Islands | James Weddell |
| Wellesley Islands | Australia}} Australia | Richard Wellesley, 1st Marquess Wellesley |
| Wellington Island | Chile}} Chile | Arthur Wellesley, 1st Duke of Wellington |
| Whidbey Island | United States}} United States | Joseph Whidbey |
| Wilson Island | Antarctica}} Antarctica | W. Stanley Wilson |
| Wilson Island | India}} India | Archdale Wilson |
| Wolf Island | Ecuador}} Ecuador | Theodor Wolf |
| Wolfe Island | Canada}} Canada | James Wolfe |
| Wollaston Islands | Chile}} Chile | William Hyde Wollaston |
| Woronkofski Island | United States}} United States | Lieutenant Woronkovski |
| Wrangel Island | Russia}} Russia | Ferdinand von Wrangel |
| Yakobi Island | United States}} United States | Ivan Iakobi |
| Yos Sudarso Island | Indonesia}} Indonesia | Yos Sudarso |
| Zarembo Island | United States}} United States | Dionizy Zaremba |
| Zavodovski Island | South Georgia and the South Sandwich Islands}} South Georgia and the South Sandwich Islands | Lieutenant Ivan Zavodovski |