Satun is one of the southern provinces of Thaïland.
The name Satun is a Thai version of its original Malay name: Setul.
Until 1813 Satun was a district of the Malay state of Kedah, then known as Setul Mambang Segara or Mukim Setul n Malay.
After that date it was administered by a governor sent from Nakhon Si Thammarat.
In 1897 Satun became part of Monthon Saiburi (now Kedah), which in 1909 was divided between British Empire and Siam as part of Anglo-Siamese Treaty of 1909.
While most of Kedah was ceded to Britain, Satun was awarded to Siam because it had a relatively large Thai population.
Satun was then incorporated into Monthon Phuket. The monthon system was ended in 1933, and Satun province became a first-level subdivision of Thailand.