Bislig, officially the City of Bislig, is a 3rd class component city in the province of Surigao del Sur, Philippines. According to the 2020 census, it has a population of 99,290 people. It is the most populous among the cities and municipalities in the province of Surigao del Sur. Barangay Mangagoy, the downtown area often dubbed by its residents as "the little city within the city", is the center of trade and industry of Bislig which has a population of 32,464 as of the 2015 estimate.