Saudis (Suʿūdiyyūn) or Saudi Arabians are the citizens and nationals of Kingdom of Saudi Arabia. They are mainly composed of Arabs and live in the five historical Regions: Najd, Hejaz, Asir, Tihamah and Al-Ahsa; the regions which the Kingdom of Saudi Arabia was founded on or what was formerly known as the Kingdom of Hejaz and Nejd in the Arabian Peninsula. Saudis speak one of the dialects of Peninsular Arabic, including the Hejazi, Najdi, Gulf and Southern Arabic dialects (which includes Bareqi), as a mother tongue. According to the 2022 census, Saudi nationals represented approximately 18,800,000 making up 58.4% of the total population. The word Saudi originated from the name of the ruling family House of Saud, today it used as an inclusive name for the country and its citizens. The first official population census of Saudi Arabia was in 1974. It had 6,218,361 Saudi nationals and 791,105 non-nationals for a total of 7,009,466. Of those, 5,147,056 people were settled and the number of nomads recorded were 1.86 million. Until the 1960s, much of the population was nomadic or seminomadic; due to rapid economic and urban growth, more than 95% of the population now is settled. 80% of Saudis live in three major urban centers—Riyadh, Jeddah, or Dammam. Some cities and oases have densities of more than . Despite the rapid growth in Saudi Arabia over the past decades, it is experiencing a rapid decline not only in mortality, but followed by fertility rates, which fell from about seven children on average per woman in the last century to 2.4 in 2016, based on the latest population survey conducted by the Saudi Authority for Statistics. Saudi Arabia has lagged far behind in increasing its population compared to its neighbors such as Iraq and Syria. The number of Arab tribes in Saudi Arabia is very many, divided into many families and tribes, since Saudi Arabia is in the center of the Arabian Peninsula Culture of Saudi Arabia The cultural setting of Saudi Arabia is Arab and Islam, and is deeply religious, conservative, traditional, and family oriented.