| Isengard | Isengard |
| Isenthalpic process | Przemiana izentalpowa |
| Isentropic process | Przemiana izentropowa |
| Iseo | Iseo |
| Iserlohn | Iserlohn |
| Isernia | Isernia |
| Isetnofret | Isetnofret |
| Isetta | BMW Isetta |
| Isfahan | Isfahan |
| Isfahan Province | Isfahan |
| Isfara | Isfara |
| ISFET | ISFET |
| Ish-bosheth | Iszbaal |
| Ishenbai Kadyrbekov | Iszegnbaj Kadyrbekow |
| Ishihara color test | Tablice Ishihary |
| Ishikawa | Prefektura Ishikawa |
| Ishikawa diagram | Diagram Ishikawy |
| Ishikawa Prefecture | Prefektura Ishikawa |
| Ishim | Iszym |
| Ishim River | Iszym |
| Ishimbay | Iszymbaj |
| Ishirō Honda | Ishirō Honda |
| Ishmael | Izmael |
| Ishpuinis of Urartu | Ispini |
| Ishtar | Isztar |
| Ishtar Gate | Brama Isztar |
| Ishvara | Iśwara |
| Ishøj | Gmina Ishøj |
| Isidor Gunsberg | Isidor Gunsberg |
| Isidor Isaac Rabi | Isidor Isaac Rabi |
| Isidore | Izydor |
| Isidore Mvouba | Isidore Mvouba |
| Isidore of Alexandria | Izydor |
| Isidore of Kiev | Izydor z Kijowa |
| Isidore of Miletus | Izydor z Miletu |
| Isidore of Seville | Izydor z Sewilli |
| Isidore the Laborer | Izydor Oracz |
| Isildur | Isildur |
| Ising model | Model Isinga |
| Isis | Izyda |
| Isisaurus | Isizaur |
| Iskar | Iskyr |
| İskenderun | Aleksandretta |
| Isla Aves | Wyspa Ptasia |
| Isla de Alborán | Isla de Alborán |
| Isla de Aves | Wyspa Ptasia |
| Isla de la Juventud | Isla de la Juventud |
| Isla de los Estados | Wyspa Stanów |
| Isla Grande de Tierra del Fuego | Ziemia Ognista |
| Isla Margarita | Margarita |
| Isla Perejil | Perejil |
| Islam | islam |
| Islamabad | Islamabad |
| Islamabad Capital Territory | Stołeczne Terytorium Islamabadu |
| Islamic | islamski |
| Islamic architecture | Architektura islamu |
| Islamic calendar | Kalendarz muzułmański |
| Islamic calligraphy | Kaligrafia arabska |
| Islamic clergy | Ulem |
| Islamic Courts Union | Unia Trybunałów Islamskich |
| Islamic fundamentalism | Fundamentalizm islamski |
| Islamic Jihad | Islamski Dżihad |
| Islamic Jihad Movement in Palestine | Palestyński Islamski Dżihad |
| Islamic Movement of Uzbekistan | Islamski Ruch Uzbekistanu |
| Islamic philosophy | Filozofia świata islamu |
| Islamic Renaissance Party of Tajikistan | Islamska Partia Odrodzenia Tadżykistanu |
| Islamic republic | Republika islamska |
| Islamic Republic of Iran | Iran |
| Islamic Republic of Mauritania | Mauretania |
| Islamic Republic of Pakistan | Pakistan |
| Islamic Salvation Front | Islamski Front Ocalenia |
| Islamic studies | islamistyka |
| Islamic view of Aaron | Aaron |
| Islamic view of Abraham | Abraham |
| Islamic view of Adam | Adam |
| Islamic view of Ezra | Księga Ezdrasza |
| Islamic view of Ishmael | Izmael |
| Islamic view of Jesus | Isa |
| Islamic view of Lot | Lot |
| Islamic view of Moses | Mojżesz |
| Islamic view of Noah | Noe |
| Islamic view of Solomon | Salomon |
| Islamic view of Virgin Mary | Maria w islamie |
| Islamic view of Zechariah | Zachariasz |
| Islamism | Islamizm |
| Islamitic | Islam |
| Islamization | islamizacja |
| Islamize | islamizować |
| Islamophobia | islamofobia |
| island | wyspa |
| Island arc | Łuk wysp |
| island ecosystem | ekosystem wysp |
| Island Fox | Lis wyspowy |
| Island hopping | Taktyka żabich skoków |
| Island of California | Kalifornia |
| Island of Mozambique | Mozambik |
| Island of stability | Wyspa stabilności |
