The island dates only to 1722, when a canal was constructed as a shortcut to bypass a bend in the Om Kret branch of the Chao Phraya river. As the canal was widened several times, the section cut off eventually became a separate island. The island continues to serve as a refuge to the Mon tribes who dominated central Thailand between the 6th and 10th centuries and have retained a distinct identity in their version of Buddhism and, particularly at Ko Kret, their pottery.