| Inverclyde | Inverclyde |
| Inverness | Inverness |
| inversion | inversion |
| inversionslag | inversion layer |
| investering | investment |
| investering i forureningskontrol | pollution control investment |
| Investiturstriden | Investiture Controversy |
| Investor AB | Investor AB |
| Inđija | Inđija |
| Io | Io |
| Ioan Gruffudd | Ioan Gruffudd |
| IOC | International Olympic Committee |
| iod | iodine |
| Iokaste | Jocasta |
| Iolanda Balas | Iolanda Balaş |
| Ion | Ion |
| Ion Antonescu | Ion Antonescu |
| Ion-motor | Ion thruster |
| ionbytning | ion exchange |
| ionbytter | ion exchanger |
| ioner | ion |
| ioniserende stråling | ionising radiation |
| Ionisk | Ionian mode |
| Ioniske Hav | Ionian Sea |
| ionosfære | ionosphere |
| Iota | Iota |
| Iowa | Iowa |
| IP-adresse | IP address |
| Ip-port | Port |
| IP-telefoni | Voice over IP |
| Ipabog | Ipabog |
| Iphigenia på Tauris | Iphigénie en Tauride |
| IPN | Interplanetary Internet |
| IPod | IPod |
| IPod shuffle | IPod shuffle |
| IPsec | IPsec |
| Ipswich | Ipswich |
| Iquique | Iquique |
| ir | verdigris |
| IR spektrometer | Infrared spectroscopy |
| IRA | Irish Republican Army |
| Ira Levin | Ira Levin |
| Irak | Iraq |
| Irakisk dinar | Iraqi dinar |
| Irakiske byer | List of places in Iraq |
| Irakiske oprørere | Iraqi insurgency |
| Irakiske Regerende Råd | Iraqi Governing Council |
| Irakkrigen | Iraq War |
| Iraklio | Heraklion |
| Iraks fodboldlandshold | Iraq national football team |
| Iraks nationalvåben | Coat of arms of Iraq |
| Iraks provinser | Governorates of Iraq |
| Iran | Iran |
| Iran-Contra-skandalen | Iran-Contra Affair |
| Iran-Irak-krigen | Iran-Iraq War |
| Irans flag | Flag of Iran |
| Irans nationalvåben | Coat of arms of Iran |
| Irans parlament | Majlis of Iran |
| Irans politik | Politics of Iran |
| Irans præsident | President of Iran |
| Irans religiøse leder | Supreme Leader of Iran |
| Iranske kalender | Iranian calendar |
| Iranske sprog | Iranian languages |
| Irazú | Irazú Volcano |
| IRC | Internet Relay Chat |
| IRC-klienter | List of Internet Relay Chat clients |
| Irenæus | Irenaeus |
| Irgun | Irgun |
| iridium | iridium |
| Iridoid | Iridoid |
| Iris | Iris |
| Iris-slægten | Iris |
| Irish Glen of Imaal-terrier | Glen of Imaal Terrier |
| Irkut | Irkut River |
| Irkutsk | Irkutsk |
| Irkutsk oblast | Irkutsk Oblast |
| Irland | Ireland |
| Irokeserføderationen | Iroquois |
| Iron Maiden | Iron Maiden |
| Ironforge | Ironforge |
| Ironi | Irony |
| Ironman | Ironman Triathlon |
| Irrationale tal | Irrational number |
| Irredentisme | Irredentism |
| Irritere | Needle |
| irsk | Irish |
| Irsk dans | Irish dance |
| Irsk folkemusik | Music of Ireland |
| Irsk whisky | Irish whiskey |
| Irske Hav | Irish Sea |
| Irske republik | Republic of Ireland |
| Irvin McDowell | Irvin McDowell |
| Irving Berlin | Irving Berlin |
| is | ice cream |
| Is This It | Is This It |
| Isaac Albéniz | Isaac Albéniz |
| Isaac Asimov | Isaac Asimov |
| Isaac Newton | Isaac Newton |
| Isabel Allende | Isabel Allende |
| Isabella | Isabel |
| Isabella af Hainaut | Isabelle of Hainaut |
| Isabelle Adjani | Isabelle Adjani |
| Isadora Duncan | Isadora Duncan |
| Isaiah Berlin | Isaiah Berlin |
| Isang Yun | Isang Yun |
| Isao Takahata | Isao Takahata |
| Isarco | Isarco River |
| isbjerg | iceberg |
| isbjørn | polar bear |
| Ischia | Ischia |
| ISCO | International Standard Classification of Occupations |
| ISCSI | ISCSI |
| Isentropisk proces | Isentropic process |
| Iserlohn | Iserlohn |
| Isernhagen | Isernhagen |
| Isfahan | Esfahan |
| Isfugl | Common Kingfisher |
| Ishavet | Arctic Ocean |
| Ishockey | Ice hockey |
| Ishtar | Ishtar |
| Ishøj | Ishøj |
| Ishøj Kommune | Ishøj |
| ISI | Inter-Services Intelligence |
| Isildur | Isildur |
| Isis | Isis |
| iskias | sciatica |
| Isla Dawson | Dawson Island |
| Isla de los Estados | Isla de los Estados |
| Isla del Coco | Cocos Island |
| Isla Lang Fisher | Isla Fisher |
| Isla Sorna | Isla Sorna |
| islam | Islam |
| Islam i Bulgarien | Islam in Bulgaria |
| Islamabad | Islamabad |
| Islamisk kalender | Islamic calendar |
| Islamisk kunst | Islamic art |
| Islamiske begreber | List of Islamic terms in Arabic |
| Islamiske ekspansion | Muslim conquests |
| Islamiske helligdage | Muslim holidays |
| Islamisme | Islamism |
| islamofobi | Islamophobia |
| Islams historie | History of Islam |
| Islams profeter | Prophets of Islam |
| Island | Iceland |
| Islands Brygge Station | Islands Brygge station |
| Islands byer og bygder | List of settlements in Iceland |
| Islands flag | Flag of Iceland |
| Islands Folkekirke | Church of Iceland |
| Islands historie | History of Iceland |
| Islands politik | Politics of Iceland |
| Islands provinser | Counties of Iceland |
| Islands præsidenter | President of Iceland |
| islandsk | Icelandic |
| Islandsk hest | Icelandic horse |
| islandsk hvinand | Barrow's goldeneye |
| Islandsk króna | Icelandic króna |
| Islandsk ryle | Knot |
| Isle of Man | Isle of Man |
| Isle of Wight | Isle of Wight |
| Isles of Scilly | Isles of Scilly |
| islom | great northern diver |
| ISM-bånd | ISM band |
| Ismael | Ishmael |
| Ismail Haniyeh | Ismail Haniyeh |
| Ismail Kadaré | Ismail Kadare |
| Ismet Inönü | İsmet İnönü |
| ISO | ISO |
| ISO-fil | ISO image |
| ISO-norm | ISO standard |
| Isochor | Isochoric process |
| Isoelektrisk punkt | Isoelectric point |
| Isola di San Pietro | San Pietro Island |
| Isole Tremiti | Tremiti Islands |
| Isolerende sprog | Analytic language |
| Isoleret sprog | Language isolate |
| isolering | insulation |
| isomer | isomer |
| Isonoe | Isonoe |
| Isopren | Isoprene |
| Isoroku Yamamoto | Isoroku Yamamoto |
| Isortoq | Isortoq |
| Isoterm | Isothermal process |
| isotop | isotope |
| Isotoptabel | Isotope table |
| Israel | Israel |
| Israel Defence Forces | Israel Defense Forces |
| Israel Museum | Israel Museum |
| Israel Security Forces | Israeli Security Forces |
| Israels historie | History of the State of Israel |
| Israels mur på Vestbredden | Israeli West Bank barrier |
| Israels nationalvåben | Emblem of Israel |
| isslag | freezing rain |
| Isstok | Ice stock sport |
| Istanbul | Istanbul |
| istandsættelse af anlæg | installation restoration |
| Isted | Idstedt |
| Istedløven | Isted Lion |
| Istid | Ice age |
| Istrien | Istria |
| Isuzu | Isuzu |
| Isère | Isère |
| IT-industrien | information technology industry |
| IT-Universitetet i København | IT University of Copenhagen |
| Italien | Italy |
| italiener | Italian |
| italiensk | Italian |
| Italiensk Arum | Arum italicum |
| Italiensk for begyndere | Italian for Beginners |
| Italiensk renæssance | Italian Renaissance |
| Italienske og franske musikudtryk | Italian musical terms used in English |
| Italienær | English |
| Italo | Italo disco |
| Italo disco | Italo disco |
| ITAR-TASS | ITAR-TASS |
| ITER | ITER |
| Iterativ | Cycling |
| Ithaka | Ithaca |
| ITIL | Information Technology Infrastructure Library |
| Itzehoe | Itzehoe |
| Iudaea | Iudaea Province |
| Iunu | Heliopolis |
| IUPAC nomenklatur | International Union of Pure and Applied Chemistry nomenclature |
| Ivald | Ivaldi |
| Ivaldesønnerne | Sons of Ivaldi |
| Ivan Basso | Ivan Basso |
| Ivan den Grusomme af Rusland | Ivan IV of Russia |
