Abdullah bin Saud Al Saud (Arabic: عبد الله بن سعود آل سعود, romanized: ʿAbd Allāh bin Suʿūd Āl Suʿūd; died May 1819) was the ruler of the First Saudi State from 1814 to 1818. He was the last ruler of the First Saudi State and was executed in Constantinople under the Ottoman Empire. Although the Ottomans maintained several garrisons in the Nejd thereafter, they were unable to prevent the rise of the Emirate of Nejd, also known as the Second Saudi State, led by Turki bin Abdullah.