King Abdul-Aziz of Saudi Arabia (1876 - 9 November 1953) (Arabic: ??? ?????? ?? ????? 鈥楢bd al-鈥楢ziz Al Su鈥榰d) was the first monarch of Saudi Arabia; the third Saudi State. He was usually called Ibn Saud in English-speaking countries.

Beginning with the reconquest of his family's ancestral home city of Riyadh in 1902; he consolidated his control over the Najd in 1922; then conquered the Hijaz in 1925. Having conquered almost all of central Arabia; he united his dominions into the Kingdom of Saudi Arabia in 1932. As King; he presided over the discovery of petroleum in Saudi Arabia in 1938 and the beginning of large-scale oil exploitation after World War II.