| isolationism | izolacjonizm |
| isolationist | izolacjonista |
| isomer | izomer |
| Isometric projection | Rzut izometryczny |
| isomorphism | izomorfizm |
| Isone | Isone |
| Isonoe | Isonoe |
| Isopoda | Równonogi |
| Isopods | Równonogi |
| Isoprene | Izopren |
| Isopyrum | Zdrojówka |
| isoquant | izokwanta |
| Isoquinoline | Izochinolina |
| Isorno | Isorno |
| Isoroku Yamamoto | Isoroku Yamamoto |
| Isosorbide dinitrate | Diazotan izosorbidu |
| Isospin | Izospin |
| Isostasy | Izostazja |
| Isothermal process | Przemiana izotermiczna |
| Isotone | Izoton |
| isotope | izotopy |
| Isozyme | Izoenzymy |
| Isoëtes | Porybliny |
| ISP | dostawca usług internetowych |
| Isparta | Isparta |
| Isparta Province | Isparta |
| Ispica | Ispica |
| Ispringen | Ispringen |
| Israel | Izrael |
| Israel Albert Horowitz | Israel Horowitz |
| Israel Ba-Aliya | Israel Ba-Aliya |
| Israel BaAliya | Israel Ba-Aliya |
| Israel Central Bureau of Statistics | Centralne Biuro Statystyki Izraela |
| Israel Defense Forces | Siły Obronne Izraela |
| Israel Defense Forces attack Gaza Strip | Izrael atakuje strefę Gazy |
| Israel in Egypt | Izrael w Egipcie |
| Israel in the Eurovision Song Contest | Izrael w Konkursie Piosenki Eurowizji |
| Israel invades Gaza Strip | Izrael atakuje strefę Gazy |
| Israel Museum | Muzeum Izraela |
| Israel national football team | Reprezentacja Izraela w piłce nożnej |
| Israel Putnam | Isreal Putnam |
| Israel Railways | Israel Railways |
| Israel Tal | Israel Tal |
| Israel Zolli | Izrael Zolli |
| Israeli | izraelski |
| Israeli agora | Agora |
| Israeli literature | Literatura hebrajska |
| Israeli settlement | Osiedla żydowskie |
| Israeli Space Agency | Izraelska Agencja Lotów Kosmicznych |
| Israeli wine | Izrael |
| Israeli-Palestinian conflict | Wojny izraelsko-arabskie |
| Israelite | Żydzi |
| Israir Airlines | Israir |
| ISS assembly sequence | Etapy montażu ISS |
| Issachar | Issachar |
| Issei Sagawa | Issei Sagawa |
| Issel | IJssel |
| Issenheim | Issenheim |
| Isser Harel | Isser Harel |
| ISSF shooting events | Strzelectwo |
| issue | wydanie |
| Issue tracking system | Ticket tracking |
| issuer | emitent |
| Issus | Issos |
| Issyk | Issyk |
| Issyk Kul | Issyk-Kul |
| Issyk Kul Province | Obwód issykkulski |
| Issyk kurgan | Kurhan Issyk |
| Issyk-Kul | Issyk-Kul |
| Istanbul | Stambuł |
| Istanbul Biennial | Biennale w Stambule |
| Istanbul Cup | Istanbul Cup |
| Istanbul Modern | Muzeum Sztuki Nowoczesnej w Stambule |
| Istanbul Park | Istanbul Autodrom Circuit |
| Istanbul Province | Stambuł |
| Istarawshan | Istarawszan |
| Istari | Istari |
| Isthmian League | Isthmian League |
| isthmus | przesmyk |
| Isthmus of Corinth | Przesmyk Koryncki |
| Isthmus of Panama | Przesmyk Panamski |
| Isthmus of Perekop | Przesmyk Perekopski |
| Isthmus of Tehuantepec | Przesmyk Tehuantepec |
| isthmus of the fauces | cieśń gardzieli |
| İstiklal Marşı | Hymn Turcji |
| İstiklâl Marşı | Hymn Turcji |
| Istiqlal Party | Partia Istiqlal |
| Istituto Nazionale di Statistica | Istituto Nazionale di Statistica |
| Istok | Wschód |
| ISTP | ISTP |
| Istra county | Istarska županija |
| Istria | Istria |
| Istria County | Istarska županija |
| Istriot language | Język istriocki |
| Istro-Romanian language | Język istrorumuński |
| Istro-Romanians | Język istrorumuński |
| István Bilek | István Bilek |
| István Dobó | István Dobó |
| István Nyers | István Nyers |
| István Rózsavölgyi | István Rózsavölgyi |
| István Szabó | István Szabó |
| István Széchenyi | István Széchenyi |
| István Tisza | István Tisza |
| István Tóth | István Tóth |
| ISU Grand Prix of Figure Skating | Grand Prix w łyżwiarstwie figurowym |
| ISU Judging System | Code of Points |
| Isuzu | Isuzu |
| Isuzu MU Wizard | Opel Frontera |
| Isère | Isère |
| Isère River | Isère |
| Isérables | Isérables |
| it | ono |
| it goes without saying | wiadomo |
| It Happened One Night | Ich noce |
| it is necessary to | trzeba |
| it is possible | można |
| it is worth | warto |
| it never rains but it pours | biednemu zawsze wiatr w oczy |
