The crown prince of Saudi Arabia () is the second-most important position in Saudi Arabia, second to the King, and is his designated successor. Currently, the Crown Prince assumes power with the approval of the Allegiance Council after he is nominated by the King. This system was introduced to the country during the reign of King Abdullah. In the absence of the King, an order is issued to have the Crown Prince manage the affairs of the state until the King's return.
Styles of the Crown Prince
The Crown Prince is referred to as His Royal Highness and then Sir from there after.

History of the crown prince position
The last crown prince of the Second Saudi State was Abdulaziz, who lost the title when Abdul Rahman bin Faisal, his father, lost his state after the Rashidis conquered Riyadh in 1890. The Al Sauds went into exile and took refuge in multiple Arab states of the Persian Gulf for nearly a decade. After the defeat at the battle of Sarif in 1900, Abdul Rahman bin Faisal gave up all ambitions to recover his patrimony. Despite this, Abdulaziz and his relatives remained determined to regain Nejd. Throughout the early 1900s, the Al Sauds went on multiple raiding expeditions and wars of conquest to attempt to regain Nejd from the Rashidis. Their efforts were highly successful, and as a result, they successfully formed the third Saudi state. When Abdulaziz had taken enough land to become recognized as an Emir, he designated his eldest son Turki as his heir. When Turki died during the flu pandemic of 1919, Abdulaziz designated his second son Saud to be heir and further succession would be brother to brother. The Al Sauds went on to expand their borders out of Nejd and established multiple iterations of the third Saudi state. In 1932, after Abdulaziz administered the Nejd and Hejaz as two separate states, he unified them and formed Saudi Arabia. Abdulaziz declared himself king, and designated Saud, one of his sons, as crown prince.

When King Abdulaziz discussed succession before his death, he was seen to favor Prince Faisal as a possible successor over crown prince Saud due to Faisal's extensive knowledge from years of experience. Many years before, King Abdulaziz recognized Faisal as the most brilliant of his sons and gave him multiple responsibilities in war and diplomacy. "I only wish I had three Faisals", King Abdulaziz once said when discussing who would succeed him. However, King Abdulaziz made the decision to keep Prince Saud as crown prince. His last words to his two sons, the future King Saud and the next in line Prince Faisal, who were already battling each other, were "You are brothers, unite!" Shortly before his death, King Abdulaziz stated, "Verily, my children and my possessions are my enemies."

A fierce power struggle between Abdulaziz's most senior sons, Saud and Faisal, erupted immediately after Abdulaziz's death. Faisal was declared the Prime Minister of Saudi Arabia in 1954, but had limited powers. Soon after, Saudi Arabia began having financial issues and debt as a result of Saud's disastrous policies. Saud was often associated among other things with the plundering of oil revenues, luxurious palaces, and conspiracy inside and outside of Saudi Arabia while Faisal was associated with sobriety, piety, puritanism, thriftiness, and modernization. As the severity of the issues in Saudi Arabia became much worse, the House of Saud forced King Saud to delegate most of his executive powers to Faisal in 1958. However, Faisal was still unable to use his powers as Saud continued to block them, which prompted Faisal to resign. As Saud continued to handle general affairs ineptly, he was bringing Saudi Arabia to the brink of collapse. On 4 March 1964, Faisal and his brothers launched a bloodless coup d'état against Saud. Faisal was made regent, and Saud remained King as a purely ceremonial role. In November, the ulema, cabinet and senior members of the ruling family forced Saud to abdicate altogether, and Faisal became king in his own right. On 6 January 1965, Saud went to the palace with his uncle Abdullah bin Abdul Rahman to declare his allegiance to King Faisal.
The next in line, Prince Mohammed, was crown prince for a short time but disclaimed that title in favour of Prince Khalid in 1965.





