List of royal families on the Arabian Peninsula in the 20th century

This is a list of royal families on the Arabian Peninsula in the 20th century.
 * Bahrain (independent since 1971): House of Khalifa (Al Khalifah).
 * Hejaz (1916–1925): Hashemites (Al Hashim).
 * Idrisid Emirate of Asir (1908–1934): Idrisid dynasty.
 * Jabal Shammar (1836–1921): House of Rashīd (Rasheed, Rashidi): historical Arabian dynasty ruling Hail, northern Nejd.
 * Kuwait: House of Sabah (Al Sabah).
 * Oman: House of Busaid (Al Bu Said).
 * Saudi Arabia: House of Saud (Al Saud).
 * Qatar (independent since 1971): House of Thani (Al Thani), originally bedouin from Nejd.
 * House of Al-Daweesh the ruling branch of the Mutayr tribe ruled Najd for a time
 * United Arab Emirates (Trucial States until 1971) – royal families:
 * Abu Dhabi: House of Nahyan (Al Nahyan).
 * Ajman: House of Nuaimi (Al Nuaimi).
 * Dubai: House of Maktoum (Al Maktoum).
 * Fujairah: House of Sharqi (Al Sharqi).
 * Ras Al Khaimah and Sharjah: House of Qasimi (Al Qasimi).
 * Umm Al Quwain: House of Mualla (Al Mualla).


 * Yemen:
 * Federation of South Arabia (1962–1967): see "House" under "Federation of South Arabia § List of rulers". Abolished in 1967 and replaced by the People's Democratic Republic of Yemen (South Yemen; Aden).
 * Mutawakkilite Kingdom of Yemen (1918–1970): the Rass House (al-Rassi), abolished in 1970 after being defeated by the Yemen Arab Republic (North Yemen, Sanaa) in the North Yemen Civil War (1962–1970).