word | | Currency (code) |
| Islands | Solomon Islands | Solomon Islands dollar (SBD) |
| Isle | Isle of Man | Isle of Man pound (IMP), also known as the Manx pound note: the British pound is also legal tender, but change is given in IMP |
| ISO | Israel | new Israeli shekel (ILS); note - NIS is the currency abbreviation; ILS is the International Organization for Standardization (ISO) code for the NIS |
| Israeli | Gaza Strip | new Israeli shekel (ILS) |
| Israeli | Israel | new Israeli shekel (ILS); note - NIS is the currency abbreviation; ILS is the International Organization for Standardization (ISO) code for the NIS |
| Israeli | West Bank | new Israeli shekel (ILS); Jordanian dinar (JOD) |
| Jamaican | Jamaica | Jamaican dollar (JMD) |
| January | Akrotiri | euro (EUR) adopted 1 January 2008; note - the Cypriot pound (CYP) formerly used |
| January | Cyprus | Cypriot pound (CYP); euro (EUR) after 1 January 2008 |
| January | Dhekelia | euro (EUR) adopted 1 January 2008; note - the Cypriot pound (CYP) formerly used |
| January | Iraq | New Iraqi dinar (NID) as of 22 January 2004 |
| January | Malta | euro (EUR) as of 1 January 2008; Maltese lira (MTL) before then |
| January | Slovenia | euro (EUR) note: on 1 January 2007, the euro became Slovenia's currency; both the tolar and the euro were in circulation from 1 January until 15 January 2007 |
| January | Turkey | Turkish lira (TRY); old Turkish lira (TRL) before 1 January 2005 |
| Jersey | Jersey | Jersey pound note: the British pound is also legal tender |
| JMD | Jamaica | Jamaican dollar (JMD) |
| JOD | Jordan | Jordanian dinar (JOD) |
| JOD | West Bank | new Israeli shekel (ILS); Jordanian dinar (JOD) |
| Jordanian | Jordan | Jordanian dinar (JOD) |
| Jordanian | West Bank | new Israeli shekel (ILS); Jordanian dinar (JOD) |
| JPY | Japan | yen (JPY) |
| KD | Kuwait | Kuwaiti dinar (KD) |
| Kenyan | Kenya | Kenyan shilling (KES) |
| KES | Kenya | Kenyan shilling (KES) |
| KGS | Kyrgyzstan | som (KGS) |
| KHR | Cambodia | riel (KHR) |
| kina | Papua New Guinea | kina (PGK) |
| kip | Laos | kip (LAK) |
| KMF | Comoros | Comoran franc (KMF) |
| Kong | Hong Kong | Hong Kong dollar (HKD) |
| konvertibilna | Bosnia and Herzegovina | konvertibilna marka (convertible mark) (BAM) |
| Korean | Korea, North | North Korean won (KPW) |
| Korean | Korea, South | South Korean won (KRW) |
| koruna | Czech Republic | Czech koruna (CZK) |