Bayog is a third class municipality in the province of Zamboanga del Sur, Philippines. According to the 2015 census, it has a population of 33,591 people. Potential tourist attractions in Bayog include the 90 feet Buco Falls, the Sigacad Hot Spring in Barangay Sigacad, and the Balumbunan Caves, which feature thousands of exotic birds. ^ "Region IX ". Census of Population : Total Population by Province, City, Municipality and Barangay. PSA. Retrieved 20 June 2016.