Bislig, officially called the City of Bislig and often referred to as Bislig City, is a third class city in the province of Surigao del Sur, Mindanao, Philippines. According to the 2010 census, it has a population of 96,578 people.Barangay Mangagoy, the downtown area often dubbed as "the little city within the city", is the center of trade and industry of Bislig which has a population of 50,000. It is the largest barangay in the city in terms of population and land area. Since Brgy.