The CFA franc, or Franc of the Financial Community of Africa, is the name of two currencies, the West African CFA franc, used in eight West African countries, and the Central African CFA franc, used in six Central African countries. Although separate, the two CFA franc currencies have always been at parity and are effectively interchangeable. The ISO currency codes are XAF for the Central African CFA franc and XOF for the West African CFA franc.

A currency is a standardization of money in any form, in use or circulation as a medium of exchange, for example banknotes and coins. A more general definition is that a currency is a system of money in common use within a specific environment over time, especially for people in a nation state. Under this definition, the British Pound sterling (£), euros (€), Japanese yen (¥), and U.S. dollars (US$) are examples of (government-issued) fiat currencies. Currencies may act as stores of value and be traded between nations in foreign exchange markets, which determine the relative values of the different currencies. Currencies in this sense are either chosen by users or decreed by governments, and each type has limited boundaries of acceptance; i.e., legal tender laws may require a particular unit of account for payments to government agencies.