The King of the Kingdom of Bahrain is the monarch and head of state of the Kingdom of Bahrain. The House of Khalifa has been the ruling family since 1783. Between 1783 and 1971, the Bahraini monarch held the title of hakim, and, from 1971 until 2002, the title of emir. On 14 February 2002, the emir of Bahrain, Hamad bin Isa Al Khalifa, declared Bahrain a kingdom and proclaimed himself the first king. The king enjoys wide ranging powers, which include appointing the prime minister and the cabinet, holding supreme command over the Defence Force, chairing the Higher Judicial Council, appointing the parliament's upper house and dissolving its elected lower house.

The House of Khalifa is the ruling family of the Kingdom of Bahrain. The Al Khalifas profess Sunni Islam and belong to the Anizah tribe. Some members of this tribe joined the Utub alliance which migrated from Najd in central Arabia to Kuwait, then ruled all of Qatar, more specifically Al Zubarah, which they built and ruled over before settling in Bahrain in the early 17th century. The current head of the family is Hamad bin Isa Al Khalifa, who became the Emir of Bahrain in 1999 and proclaimed himself King of Bahrain in 2002, in fact becoming a constitutional monarch.