Abdullah I bin al-Hussein, King of Jordan (February 1882 – 20 July 1951) born in Mecca, Hejaz, Ottoman Empire, (in modern-day Saudi Arabia) is the second of three sons of Sharif Hussein bin Ali, Sharif and Emir of Mecca and his first wife Abdiyya bint Abdullah (d. 1886).

He is educated in Istanbul, Turkey and Hijaz.

From 1909 to 1914, Abdullah sits in the Ottoman legislature, as deputy for Mecca, but allies with Britain during the First World War.

Between 1916 to 1918, working with the British guerrilla leader T. E. Lawrence, he plays a key role as architect and planner of the Great Arab Revolt against Ottoman rule, leading guerrilla raids on garrisons.

He is the ruler of Transjordan and its successor state, Jordan, from 1921 to 1951—first as Emir under a British Mandate from 1921 to 1946, then as King of an independent nation from 1946 until his assassination.