Salman bin Abdulaziz Al Saud is King of Saudi Arabia, reigning since 2015, and was also Prime Minister of Saudi Arabia from 2015 to 2022. The 25th son of King Abdulaziz, the founder of Saudi Arabia, he assumed the throne on 23 January 2015. Prior to his accession, he was Crown Prince of Saudi Arabia from 18 June 2012 to 23 January 2015. Salman is the third oldest living head of state, the oldest living monarch, and Saudi Arabia's first head of state born after the unification of Saudi Arabia. He has a reported personal wealth of at least $18 billion, which makes him the third wealthiest royal in the world and one of the wealthiest individuals in the world.

The King of Saudi Arabia, officially the King of the Kingdom of Saudi Arabia, is the monarch and head of state/government of the Kingdom of Saudi Arabia who holds absolute power. He is the head of the Saudi Arabian royal family, the House of Saud. The king is the supreme commander-in-chief of the Royal Saudi Armed Forces and the head of the Saudi national honors system. The king is called the "Custodian of the Two Holy Mosques", a title that signifies Saudi Arabia's jurisdiction over the mosques of Masjid al-Haram in Mecca and Al-Masjid an-Nabawi in Medina. The title has been used many times through the history of Islam. The first Saudi king to use the title was Faisal; however, King Khalid did not use the title after him. In 1986, King Fahd replaced "His Majesty" with the title of Custodian of the Two Holy Mosques, and it has been since used by both King Abdullah and King Salman. The king has been named the most powerful and influential Muslim and Arab leader in the world according to the Muslim 500.