Zamboanga Peninsula

Zamboanga Peninsula, also known as Region IX, is a region of the Philippines, located in Mindanao. It has a population of 3,875,576 as of the 2020 Census, and a land area of 16,904.03 square kilometers.

The region is composed of the provinces of Zamboanga del Norte, Zamboanga del Sur, and Zamboanga Sibugay, the highly-urbanized city of Zamboanga City, and the component city of Isabela City. Its regional center is Pagadian City, Zamboanga del Sur.

In the 2022 elections, the region had 2,298,930 registered voters.