Prior to A.D. 1813, Satun was a district of Kedah, known as Mukim Setul, meaning "the district of santol tree" Historical, Satun had a strong link with Kedah until A.D. 1909, under the Anglo-Siamese Agreement, when the Siamese government then agreed to relinquish the states of Kedah, Kelantan, Tregganu, and Perlis to Britain in exchange for the British's renunciation of its Extra-territorial Rights in Siam (former of Thailand). The consequence of the Anglo-Siamese Agreement shifted the status of Satun from being part of Kedah to that of Phuket and later in 1925 was under the jurisdiction of Nakhon Si Thammarat.