- Ipil City is a city in the province of Zamboanga Sibugay in the Philippines. It is the capital of the province and serves as its center of trade, commerce, and government. It is located on the western coast of Mindanao, facing the Sulu Sea. Ipil City has a population of around 69,800 people, as of the 2020 census. The city is known for its beautiful beaches, coconut plantations, and as the gateway to many ecotourism destinations in Zamboanga Sibugay.