Official nameRépublique du Niger (Republic of Niger)CapitalNiameyPopulation estimate (2015)19·90 millionInternet domain extension.neCurrencyThe unit of currency is the franc CFA (XOF).TerritoryNiger is bounded in the north by Algeria and Libya, east by Chad, south by Nigeria, south-west by Benin and Burkina Faso, and west by Mali.LanguagesThe official language is French. Hausa, Djerma and Fulani are national languages.Source: The Statesman's Yearbook 2018. Palgrave Macmillan, London Synonyms and related words