| Island of California | Île de Californie |
| Island of Montreal | Île de Montréal |
| Island of Mozambique | Île de Mozambique |
| Island of stability | Îlot de stabilité |
| islander | insulaire |
| Islands of Belize | Liste des îles du Belize |
| Islands of Vanuatu | Liste des îles du Vanuatu |
| Islas Chafarinas | Îles Chafarinas |
| Islas Marías | Îles Marías |
| isle | île |
| Isle of Arran | Arran |
| Isle of Balar | Balar |
| Isle of Jura Single Malt | Jura |
| Isle of Man | Île de Man |
| Isle of Man Airport | Aéroport du Ronaldsway |
| Isle of Man National Anthem | Arrane Ashoonagh dy Vannin |
| Isle of Mann | île de Man |
| Isle of Mull | Mull |
| Isle of Portland | Île de Portland |
| Isle of Skye | Skye |
| Isle of Wight | Île de Wight |
| Isle of Youth | Île de la Jeunesse |
| Isle River | Isle |
| Isle-les-Villenoy | Isle-les-Villenoy |
| Isles of Scilly | Sorlingues |
| islet | îlot |
| Islisberg | Islisberg |
| Islom Karimov | Islom Karimov |
| Islote Horacio | Horace |
| Ismael Falcón | Falcón |
| Ismael Urzaiz | Ismael Urzáiz |
| Ismail al-Mansur | Al-Mansur |
| İsmail Cem İpekçi | İsmail Cem |
| İsmail Enver | Ismail Enver |
| Ismail Haniyeh | Ismaël Haniyeh |
| Ismail I | Ismail Ier |
| Ismail Ibn Sharif | Moulay Ismail |
| Ismail Kadare | Ismail Kadare |
| Ismail Omar Guelleh | Ismail Omar Guelleh |
| Ismail Qemali | Ismail Qemali |
| Ismail Samani | Ismail Ier |
| Ismaili | Ismaélisme |
| Ismailia Governorate | Ismaïlia |
| Ismaily SC | Ismailia |
| Ismaël Bangoura | Ismaël Bangoura |
| Ismaël Bullialdus | Ismaël Boulliau |
| Ismaïlia | Ismaïlia |
| Ismene | Ismène |
| Ismenias | Isménias |
| İsmet İnönü | İsmet İnönü |
| Ismoil Somoni Peak | Pic Ismail Samani |
| Isny im Allgäu | Isny im Allgäu |
| ISO | Iso |
| ISO image | Télescope spatial ISO |
| ISO standard | norme ISO |
| ISO week date | Numérotation ISO des semaines |
| isobar | isobare |
| Isobaric process | Courbe de niveau |
| Isochoric process | Transformation isochore |
| Isocrates | Isocrate |
| Isoelectric point | Point isoélectrique |
| Isoelectronicity | Isoélectronique |
| ISOFIX | ISOFIX |
