word | | Country name |
| form | 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 |
| form | 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 |
| form | Iraq | conventional long form: Republic of Iraq conventional short form: Iraq local long form: Al Jumhuriyah al-Iraqiyah local short form: Al Iraq |
| form | Ireland | conventional long form: none conventional short form: Ireland local long form: none local short form: Eire |
| form | Isle of Man | conventional long form: none conventional short form: Isle of Man abbreviation: I.O.M. |
| form | Israel | conventional long form: State of Israel conventional short form: Israel local long form: Medinat Yisra'el local short form: Yisra'el |
| form | Italy | conventional long form: Italian Republic conventional short form: Italy local long form: Repubblica Italiana local short form: Italia former: Kingdom of Italy |
| form | Jamaica | conventional long form: none conventional short form: Jamaica |
| form | Jan Mayen | conventional long form: none conventional short form: Jan Mayen |
| form | Japan | conventional long form: none conventional short form: Japan local long form: Nihon-koku/Nippon-koku local short form: Nihon/Nippon |
| form | Jersey | conventional long form: Bailiwick of Jersey conventional short form: Jersey |
| form | Jordan | conventional long form: Hashemite Kingdom of Jordan conventional short form: Jordan local long form: Al Mamlakah al Urduniyah al Hashimiyah local short form: Al Urdun former: Transjordan |