Official nameRépublique du Bénin (Republic of Benin)CapitalPorto-NovoPopulation estimate (2015)10·88 millionInternet domain extension.bjCurrencyThe unit of currency is the franc CFA (XOF).TerritoryBenin is bounded in the east by Nigeria, north by Niger and Burkina Faso, west by Togo and south by the Gulf of Guinea.LanguageThe official language is French.Source: The Statesman's Yearbook 2018. Palgrave Macmillan, London Synonyms and related words