Official nameJamhuriya al Yamaniya (Republic of Yemen)CapitalsSana'a (Legislative and Administrative), Aden (Commercial)Population estimate (2015)26·83 millionInternet domain extension.yeCurrencyThe unit of currency is the riyal (YER), which consists of 100 fils.TerritoryYemen is bounded in the north by Saudi Arabia, east by Oman, south by the Gulf of Aden and west by the Red Sea.LanguageThe official language is Arabic.Source: The Statesman's Yearbook 2018. Palgrave Macmillan, London Synonyms and related words