Sibutu is a sixth class municipality and island in the province of Tawi-Tawi, Philippines. According to the 2010 census, it has a population of people. It lies about east of the coast of Sabah, Malaysia. The municipality covers the main island of Sibutu as well as four small uninhabited islands south of the main island, which are, from north to south: Sicolan Calch Island, Sicolan Island, Sicolan Islet, and Saluag Island, the latter being the southernmost island of the Philippines.
Sibutu Island has an area is . It is an important site for nature conservation.