| Isadora Duncan | Isadora Duncan |
| Isadore Singer | Isadore Singer |
| Isaiah Berlin | Isaiah Berlin |
| Isambard Kingdom Brunel | Isambard Kingdom Brunel |
| Isami Kondō | Kondō Isami |
| Isan | Isan |
| Isao Takahata | Isao Takahata |
| ISAPI | ISAPI |
| Isar | Isar |
| Isarco | Isarco River |
| isard | chamois |
| Isaura | Escrava Isaura |
| Isaurie | Isauria |
| Isaïe | Isaiah |
| Isba | Izba |
| ISBN | International Standard Book Number |
| Ischia | Ischia |
| Ischigualasto | Ischigualasto |
| Ischémie myocardique | Ischaemic heart disease |
| ISCO | International Standard Classification of Occupations |
| ISCSI | ISCSI |
| Ise-jingû | Ise Shrine |
| Iselle | Iselle |
| Iseltwald | Iseltwald |
| Isen | Isen |
| Isengard | Isengard |
| Isenthal | Isenthal |
| Isentropique | Isentropic process |
| Iseo | Iseo |
| ISeries | IBM System i |
| Iserlohn | Iserlohn |
| Isernia | Isernia |
| Iset | Iset River |
| Isetta | Isetta |
| Isfahan | Isfahan |
| Isfjorden | Isfjord |
| Ishak Pasa | Ishak Pasha Palace |
| Ishikawa | Ishikawa |
| Ishirō Honda | Ishirō Honda |
| Ishpuhini | Ishpuinis of Urartu |
| Ishtar | Ishtar |
| Ishtar Alabina | Ishtar |
| Ishvara | Ishvara |
| Ishøj | Ishøj |
| Isidor Gunsberg | Isidor Gunsberg |
| Isidor Isaac Rabi | Isidor Isaac Rabi |
| Isidore | Isidore |
| Isidore de Charax | Isidore of Charax |
| Isidore de Kiev | Isidore of Kiev |
| Isidore de Milet | Isidore of Miletus |
| Isidore de Séville | Isidore of Seville |
| Isidore Exelmans | Rémi Joseph Isidore Exelmans |
| Isidore Geoffroy Saint-Hilaire | Isidore Geoffroy Saint-Hilaire |
| Isidore Mvouba | Isidore Mvouba |
| ISight | ISight |
| Isildur | Isildur |
| Isin | Isin |
| Isis | Isis |
| Isis-Néféret | Isetnofret |
| Isistius | Isistius |
| Iskar | Iskar |
| İskenderun | İskenderun |
| Iskitim | Iskitim |
| Iskra | Iskra |
| Isla | Senglea |
| Isla de Aves | Isla Aves |
| Isla Grande de Tierra del Fuego | Tierra del Fuego |
| Isla Mágica | Isla Mágica |
| islam | Mohammedanism |
| Islam en Bulgarie | Islam in Bulgaria |
| Islam en Finlande | Islam in Finland |
| Islam en France | Islam in France |
| Islam en Grèce | Islam in Greece |
| Islam en Hongrie | Islam in Hungary |
| Islam en Islande | Islam in Iceland |
| Islam en Roumanie | Islam in Romania |
| Islam en Suède | Islam in Sweden |
| Islam en Ukraine | Islam in Ukraine |
| Islamabad | Islamabad |
| islamique | Islamic |
| Islamofascisme | Islamofascism |
| Island | Island |
| Island Def Jam Music Group | The Island Def Jam Music Group |
| islandais | Icelandic |
| Islandaise | Icelander |
| Islande | Iceland |
| Islanders de New York | New York Islanders |
| Isle | Isle River |
| Isle-les-Villenoy | Isle-les-Villenoy |
| Islington | London Borough of Islington |
| Islisberg | Islisberg |
| Islom Karimov | Islom Karimov |
| Islâmâbâd | Islamabad |
| Ismael Urzáiz | Ismael Urzaiz |
| İsmail Cem | İsmail Cem İpekçi |
| Ismail Enver | İsmail Enver |
| Ismail Ier | Ismail I |
| Ismail Kadare | Ismail Kadare |
| Ismail Omar Guelleh | Ismail Omar Guelleh |
| Ismail Qemali | Ismail Qemali |
| Ismailia | Ismaily SC |
| Ismaily SC | Ismaily SC |
| Ismaélisme | Ismaili |
| Ismaël | Ishmael |
| Ismaël Bangoura | Ismaël Bangoura |
| Ismaël Boulliau | Ismaël Bullialdus |
| Ismaël Haniyeh | Ismail Haniyeh |
| Ismaïl II | Ismail II |
| Ismaïlia | Ismaïlia |
| İsmet İnönü | İsmet İnönü |
| ISMN | International Standard Music Number |
| Ismène | Ismene |
| Isménias | Ismenias |
| Isny im Allgäu | Isny im Allgäu |
| Iso | ISO |
| isobare | isobar |
| isobathe | contour line |
| Isocrate | Isocrates |
| Isocyanate de méthyle | Methyl isocyanate |
| isocèle | isosceles |
| Isoenzyme | Isozyme |
| ISOFIX | ISOFIX |
| Isoforme | Isoform |
| Isogomphodon | Daggernose shark |
| Isojoki | Isojoki |
| Isokyrö | Isokyrö |
| Isola del Giglio | Giglio Island |
| isolant | insulator |
| Isolat | Language isolate |
| isolateur | insulator |
