Mapun (formerly Cagayan de Tawi-Tawi or Cagayan de Sulu) is a fourth class partially urban municipality in the province of Tawi-Tawi, Philippines. According to the 2010 census, it has a population of {{#property:P1082}} people.Mapun is an island municipality in the Sulu Sea on the southwestern extreme of the Philippines, located very close to Sabah, Malaysia. The people inhabiting the island are known as Jama Mapun or "people of Mapun". Their dialect is Pullun Mapun, which means "Mapun dialect".