Portrait Prime Minister (Birth–Death) Term of office Political party Imam (Reign) Took office Left office Time in office Ibrahim bin Yahya Hamid al-Din (1915–1948) 17 February 1948 18 February 1948 1 day Independent Ahmad bin Yahya (1948–1962) Ali ibn Abdullah al-Wazir (1900–1980) February 1948 April 1948 N/A Independent Hassan ibn Yahya (1908–2003) April 1948 18 June 1955 N/A Independent Vacant (18 June 1955 – 28 September 1962)