Ipil is a first class municipality and the provincial capital of Zamboanga Sibugay, Philippines. According to the 2015 census, it has a population of 74,656 people, being the most populous municipality of Zamboanga Sibugay. Ipil is located three hours from the key cities in the region, including Dapitan, Dipolog, Pagadian and Zamboanga City. The Ipil seaport is 4 kilometres south of the town center. ^ "Region IX ". Census of Population : Total Population by Province, City, Municipality and Barangay.