Western Asia, West Asia, Southwestern Asia or Southwest Asia is the westernmost subregion of Asia. The concept is in limited use, as it significantly overlaps with the Middle East (or the Near East), the main difference usually being the exclusion of the majority of Egypt (which would be counted as part of North Africa) and the inclusion of the Caucasus. The term is sometimes used for the purposes of grouping countries in statistics. The total population of Western Asia is an estimated 300 million as of 2015.
"Western Asia" was in use as a geographical term in the early 19th century, even before "Near East" became current as a geopolitical concept.
In the context of the history of classical antiquity, "Western Asia" could mean the part of Asia known in classical antiquity, as opposed to the reaches of "interior Asia", i.e. Scythia, and "Eastern Asia" the easternmost reaches of geographical knowledge in classical authors, i.e. Transoxania and India.
In the 20th century, "Western Asia" was used to denote a rough geographical era in the fields of archaeology and ancient history, especially as a shorthand for "the Fertile Crescent excluding Ancient Egypt" for the purposes of comparing the early civilizations of Egypt and the former.