Hejaz is a historical region of the Arabian Peninsula that includes the majority of the western region of Saudi Arabia, covering the cities of Mecca, Medina, Jeddah, Tabuk, Yanbu, Taif and Al-Bahah. It is thus known as the "Western Province", and it is bordered in the west by the Red Sea, in the north by Jordan and the Gulf of Suez, in the east by the Najd, and in the south by Yemen. Its largest city is Jeddah, which is the second-largest city in Saudi Arabia, with Mecca and Medina, respectively, being the third- and fourth-largest cities in the country.
As the location of the holy cities of Mecca and Medina, respectively the first and second holiest sites in Islam, the Hejaz is significant in the Arabo-Islamic historical and political landscape. This region is the most populated in Saudi Arabia, and Arabic is the predominant language, as in the rest of Saudi Arabia, with Hejazi Arabic being the most widely spoken dialect here. Some Hejazis are of ethnically diverse origins, although the vast majority are of Arab origin.