- Buol City is a city located in the province of Zamboanga Sibugay in the Philippines. It is the capital city of the province and is situated on the western coast of Mindanao island. Buol City has a population of around 98,795 people as of 2020. The city is known for its beautiful beaches, diverse marine life, and vibrant festivals such as the Zamboanga Sibugay Hermosa Festival. The economy of Buol City is primarily based on agriculture, fishing, and trade. Surrounding the city are lush forests and mountain ranges, making it a popular destination for nature lovers and adventure enthusiasts.