Muhammad bin Abdul Rahman Al Saud (Arabic: محمد بن عبد الرحمن آل سعود Muḥammad bin ʿAbd ar Raḥman Āl Suʿūd; c. 1877 – 25 July 1943) was an Arabian soldier and politician who played a role in the conquests of his half-brother Abdulaziz that led to the formation of the Kingdom of Saudi Arabia.