Western Asia: West Asia or Southwest Asia
Western Asia, West Asia, or Southwest Asia, is the westernmost sub-region of the larger geographical region of Asia, as defined by some academics, UN bodies and other institutions. It is almost entirely a part of the Middle East, and includes Anatolia, the Arabian Peninsula, Iran, Mesopotamia, the Levant, the island of Cyprus, the Sinai Peninsula, and partly the Caucasus Region (Transcaucasia). The region is considered to be separated from Africa by the Isthmus of Suez in Egypt, and separated from Europe by the waterways of the Turkish Straits and the watershed of the Greater Caucasus. Central Asia lies to its northeast, while South Asia lies to its east. Eight seas surround the region (clockwise): the Aegean Sea, the Black Sea, the Caspian Sea, the Persian Gulf, the Arabian Sea, the Gulf of Aden, the Red Sea, and the Mediterranean Sea.
Western Asia covers an area of 5,994,935 km2 (2,314,657 sq mi), with a population of around 313 million. Out of the 21 countries located fully or partly within the region, 13 are a part of the Arab world. The most populous countries in Western Asia are Iran, Turkey, Iraq, Saudi Arabia and Yemen.