Zamboanga was one of the provinces of the Philippines. The town of Zamboanga (now Zamboanga City) was its capital. On June 6, 1952, Zamboanga was divided into two: Zamboanga del Norte and Zamboanga del Sur.

One of the chief cities of Mindanao and a busy seaport, it is the hub of a major iron-producing and lumbering area, which has large-scale rubber cultivation, plywood mills, and resin plants. The city is situated at the foot of high mountains. Although it is in a mostly Muslim area, the city is predominantly Christian. Points of interest include a 16th-century Spanish fort and the mosque at Talangkusay, a famous Moro ceremonial center.

Sources:
Wikipedia: Zamboanga province
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved.