Musa Kazim al-Husayni (Arabic: موسى كاظم الحسيني, Musa Kazem al-Ḥussaynī) (Jerusalem, 1850–1934) was nominated to several senior posts in the Ottoman administration. He belongs to the prominent al-Husayni family of northeastern Jerusalem. He was mayor of Jerusalem (1918-1920), chairman of the Palestinian Arab Action Committee and leader of the Palestinian national movement from 1922 until 1934.
Husayni was a graduate from the Istanbul School of Administration and held many administrative positions (among others district Governor of Yemen, 1908) in the Ottoman Empire from which he retired on the eve of World War I.
He was elected president of the Arab Executive Committee at the 3rd Congress in Haifa, 14 December, 1920 and held this position until 1928. He was dismissed from the office of mayor of Jerusalem after his involvement in the 1920 Palestine riots.
Husayni was head and member of the Palestinian Delegations to London in the 1920-30s. He acted as leader of the demonstration protesting Zionist immigration in Jaffa on 27 October, 1933 where he was injured, hastening his death on 27 March, 1934. He was the father of Abd al-Qadir al-Husayni.
- Gelber, Yoav (1997). Jewish–Transjordanian Relations 1921-48: Alliance of Bars Sinister. London: Routledge. ISBN 0-7146-4675-X