The International Organization for Standardization publishes a list of standard currency codes referred to as the ISO 4217 code list. Below, we list ISO 4217 codes for currencies in circulation, plus some (marked with an asterisk) that are not officially recognized by the ISO. This list excludes obsolete and old Euro-zone currencies.

The first two letters of the ISO 4217 three-letter code are the same as the code for the country name, and, where possible, the third letter corresponds to the first letter of the currency name.

The ISO 4217 standard includes a crude mechanism for expressing the relationship between a major currency unit and its corresponding minor currency unit. This mechanism is called the currency " exponent " and assumes a base of 10. For example, USD (the United States dollar) is equal to 100 of its minor currency unit the " cent ".

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