!Yemen Yemen is a country, Region - Western Asia, Capital - San'a', Population in 2003 - 20,010,000, Population density - 38 per sq km, Surface area - 527,968 sq km, and Currency - rial. Formerly, it was a province in the SW. of Arabia, bounded on the N. by Hedjaz, bordering on the Red Sea, and forming the Arabia Felix of the ancients; about 400 m. in length and 150 m. in breadth; it is a highly fertile region, and yields tropical and sub-tropical fruits, in particular coffee, dates, gums, spices, and wheat.