Demographics
Main article: Demographics of Saudi Arabia
Saudi Arabia's 2001 population is estimated to be about 22.7 million, including about 6.4 million resident foreigners. Until the 1960s, most of the population was nomadic or seminomadic; due to rapid economic and urban growth, more than 95% of the population now is settled. Some cities and oases have densities of more than 1,000 people per square kilometer.
Most Saudis are ethnically Arab. Some are of mixed ethnic origin and are descended from Turks, Iranians, Indonesians, Indians, Africans, and others, most of whom immigrated as pilgrims and reside in the Hijaz region along the Red Sea coast. Many Arabs from nearby countries are employed in the kingdom. There also are significant numbers of Asian expatriates mostly from India, Pakistan, Bangladesh, Indonesia, and the Philippines. There are less than 100,000 Westerners in Saudi Arabia.
Culture
Main article: Culture of Saudi Arabia
Saudi Arabia forbids the public practice of any religion besides Islam. Those who follow other belief systems--often foreign-born "guest workers"--must do so in private.