Zamboanga Peninsula is a peninsula and an administrative region in the Philippines. Designated as Region IX, the region consists of three provinces, namely, Zamboanga del Norte, Zamboanga del Sur, and Zamboanga Sibugay. The region was previously known as Western Mindanao before the enactment of Executive Order No. 36 on September 19, 2001. Pagadian City is the regional center.
The cities that make up the Zamboanga Peninsula Region, also known as Region 9, are:
1. Isabela City
2. Dapitan City
3. Dipolog City