Bayugan is a city in the province of Agusan del Sur, Philippines. It has a population of 99,361 according to the NSO Census of 2010. The City is classified as a third class city according to The Local Government Code of 1991 (Republic Act No. 7160). Being the only city in the 1st Congressional Disctrict and the only city in the province of Agusan del Sur, Bayugan serves as "The Growth Center" of the province.