| Country | Country name |
| Hong Kong | conventional long form: Hong Kong Special Administrative Region conventional short form: Hong Kong local long form: Xianggang Tebie Xingzhengqu local short form: Xianggang abbreviation: HK |
| Hungary | conventional long form: Republic of Hungary conventional short form: Hungary local long form: Magyar Koztarsasag local short form: Magyarorszag |
| Iceland | conventional long form: Republic of Iceland conventional short form: Iceland local long form: Lydveldid Island local short form: Island |
| India | conventional long form: Republic of India conventional short form: India local long form: Republic of India/Bharatiya Ganarajya local short form: India/Bharat |
| Indian Ocean | void |
| Indonesia | conventional long form: Republic of Indonesia conventional short form: Indonesia local long form: Republik Indonesia local short form: Indonesia former: Netherlands East Indies, Dutch East Indies |
| Iran | conventional long form: Islamic Republic of Iran conventional short form: Iran local long form: Jomhuri-ye Eslami-ye Iran local short form: Iran former: Persia |
| Iraq | conventional long form: Republic of Iraq conventional short form: Iraq local long form: Al Jumhuriyah al-Iraqiyah local short form: Al Iraq |
| Ireland | conventional long form: none conventional short form: Ireland local long form: none local short form: Eire |
| Isle of Man | conventional long form: none conventional short form: Isle of Man abbreviation: I.O.M. |
| Israel | conventional long form: State of Israel conventional short form: Israel local long form: Medinat Yisra'el local short form: Yisra'el |
| Italy | conventional long form: Italian Republic conventional short form: Italy local long form: Repubblica Italiana local short form: Italia former: Kingdom of Italy |
| Jamaica | conventional long form: none conventional short form: Jamaica |
| Jan Mayen | conventional long form: none conventional short form: Jan Mayen |
| Japan | conventional long form: none conventional short form: Japan local long form: Nihon-koku/Nippon-koku local short form: Nihon/Nippon |