Mohammed Amin al-Husseini (Arabic: محمد أمين الحسيني; c. 1897 – 4 July 1974) was a Palestinian Arab nationalist and Muslim leader in Mandatory Palestine. He was the scion of the al-Husayni family of Jerusalemite Arab nobles, who trace their origins to the Islamic prophet Muhammad.
Husseini was born in Jerusalem, Ottoman Empire in 1897, he received education in Islamic, Ottoman, and Catholic schools. In 1912, he pursued Salafist religious studies in Cairo. Husseini later went on to serve in the Ottoman army during World War I. At war's end he stationed himself in Damascus as a supporter of the Arab Kingdom of Syria, but following its disestablishment, he moved back to Jerusalem, shifting his pan-Arabism to a form of Palestinian nationalism. From as early as 1920, he actively opposed Zionism, and as a leader of the 1920 Nebi Musa riots, was sentenced for ten years imprisonment but pardoned by the British. In 1921, Herbert Samuel, the British High Commissioner appointed him Grand Mufti of Jerusalem, a position he used to promote Islam while rallying a non-confessional Arab nationalism against Zionism. During the 1921–1936 period, he was considered an important ally by the British authorities. His appointment by the British for the role of grand mufti of all Palestine (a new role established by the British) helped divide the Palestinian leadership structure and national movement.